SPRING, A Poem By Edna St. Vincent Millay

SPRING, A Poem By Edna St. Vincent Millay SPRINGBy: Edna St. Vincent Millay (1892-1950) To what purpose, April, do you return again?Beauty is not enough.You can no longer quiet me with the rednessOf little leaves opening stickily. I know what I know.The sun is hot on my neck as I observeThe spikes of the crocus.The smell of the earth is good. It is apparent that there is no death.But what does that signify?Not only under ground are the brains of menEaten by maggots. Life in itselfIs nothing,An empty cup, a flight of uncarpeted stairs.It is not enough that yearly, down this hill, AprilComes like an idiot, babbling and strewing flowers. Spring â€Å"Spring† is a powerful free verse poem written by Edna St. Vincent Millay, in 1921 . At first glance, this poem does not seem extremely meaningful. However, the time during which it was written, explains the poems true importance because it is after World War. It contains figurative language, specifically describing post war trauma. The tone and mood enforce the element of war to a greater extent. The atmosphere created by the author is vague, but looking deeply into the metaphorical language, allows you to truly understand the casualties. In the poem â€Å"Spring† written by Edna St. Vincent Millay, war is cruel and indescribable. In quatrain three, line three, Millay writes, â€Å"Not only under ground are the brains of men.† This depicts the battlefield. The author explains that as spring arrives, the reality of the war is forgotten. Citizens continue with their lives, forgetting about the casualties. The nice weather comes, but it should have never cover ed up the war. The author is also upset. She is angry regarding the month of April. Millay is trying to ask what the point of Spring is, after the death of so many. The bright flowers, the warm sun and the nice breeze are useless when there is no one to admire them.On another note, the written part of the poem consists of four quatrains and one couplet. Three lines of each quatrain are end-stopped, while the remaining one is enjambed. In the couplet, one line is enjamed and the other is end-stopped. In the first two quatrains, the author is unsatisfied. Millay could be indecisive about the month of April. However, the remainder of the poem identifies that she is frustrated with society. The last two lines of the fourth quatrain explain this theory. She is identifying life as pointless and useless. Millay may not believe in war and is angered by it. The couplet enforces this prediction even more. The tone of the last line indicates her frustration, anger and irritation. The rhythm is irregular with no specific rhyme scene. However, this free verse poem has a pattern similar to Shakespearean poems; the first eight lines are talking about a subject, which builds up to contradict against the rest of the poem. In this case, for the first eight lines, the poet discusses the climate and nature during April, and then contrasts it to war for the rest of the poem. There are some lines in this poem, which are metaphors and have symbolism. For example, the last two lines of the fourth quatrain. The â€Å"empty cup, † symbolizes the future. It explains our future to be nothing. This is also a metaphor because it compares life to an empty cup. Fighting will lead to nothing. This is the hidden message in this line. The atmosphere of the poem always relates back to war. There is a lot of imagery in the poem. For example, line four of the first quatrain. The reader can imagine the tiny leaves opening slowly, as the day goes by. This makes it a form of imagery. In the th ird line of the third quatrain, the author is referring to a place known as ‘No Mans Land. This is the land between two trenches that all soldiers feared, because of death, due to exploding shells. Cacophonic The entire poem is cacophonic. â€Å"The sun is hot /the spikes of the crocus /eaten by maggots ,† are all unpleasant phrases. These expressions helped create the tone, which is war and casualties. This poem is unique in another sense as well. The author is speaking to the season, which is quite preposterous. The last line of this poem is another unique phrase. The author personifies April. He remarks on April as knowing nothing. It just comes and brings some useless flowers, thinking that all will become well; these shall not be accepted because of the war. The poem was an understatement because truly looking at just the text, line eleven was the only sentence, which talked about the victims. Millay has chosen her words extremely carefully when writing this poem. She vaguely describes the true meaning and theme of this literature. What I mean by this is that, without a biography, it would be difficult to infer the true theme of this poem. War is embedded in the specific langu age and the result is a truly unique poem. The precise symbolism has true meaning when deeply investigated. An illusion has been created by the title of â€Å"Spring† giving this poem an even greater twist. â€Å"Spring† by Edna St. Vincent Millay is about war and the results; an inhospitable environment with casualties and no future.

Everything has to evolve or else it perishes Essay

Denial, and acceptance, these words are intertwined with innocence, and the loss of said innocence. In order for one to mature one has to accept the truth and make necessary adjustments. The people who deny the truth don’t experience the â€Å"fall from innocence† and may be blind to the things going on around them. If the innocent chooses to accept the truth the characters â€Å"evolves† and falls from innocence. If a character chooses to deny the truth it will take a toll on the character mentally, or physically. In A Separate Peace, John Knowles uses the archetype of the Fall from Innocence in order to illustrate Leper’s philosophy, â€Å"Everything has to evolve or else it perishes. † He demonstrates this theme through the characters of Leper, Finny, and Gene. Gene is a character in the book who loses his innocence. Gene is smart young man attending attending Devon school. He is best friend’s with Finny. Gene is always competing with Finny, most of the time Finny doesn’t realize this. Finny is oblivious to many of the things going around him and is always happy. Finny’s attitude and the way he carries himself frustrate Gene. Finny is â€Å"perfect† and nothing ever seems to go wrong in Finny’s life. Gene becomes jealous of Finny and begins to resent Finny for trying to sabotage his academics. These feelings of jealousy eventually cause Gene to push Finny off the tree. Gene tries to preserve his innocence by attempting to convince himself that he was not responsible for the fall and that it must have mysteriously happened. The fall shattered Finny’s legs. Deep down Gene knew that he was responsible for Finny’s fall. This experience was traumatizing for Gene. Gene would have to deal with the fact that HE was responsible for Finny not being able to do anything he loved. Gene was responsible for Finny not being able to be in the Olympics, not being able to enlist, and causing Finny to eventually lose his innocence. Gene was directly responsible for his best friend’s problems and he couldn’t ignore it. Gene chose not to enlist to stay with Finny, he chose to train for the Olympics for Finny, he probably would have done more if he had to. Gene did these to protect his innocence, and make himself feel better. He did not want to believe he was responsible and was trying to make up for the fall by doing these. After the fallt things don’t get better for Gene. It isn’t until Leper’s testimony that he must accept what he has done. When Leper confirms that it was not an accident and that Gene was responsible for breaking his best friend’s legs Gene can no longer pretend that everything is fine. Everyone including Finny knew that Gene was responsible. Gene could no longer act like he did not do it. Gene had to cope with his actions and their consequences. Accepting his actions are what lead to Gene losing his innocence. Finny is an example of the Innocent archetype, who â€Å"perishes† when he denies the truth. Finny is a prime example of the innocent, he seeks safety, he is naive and doesn’t understand or want to understand the evils of the world. Finny’s loss comes at the hands of his best friend Gene. Finny’s fall begins when he and Gene decide to jump off the tree and Finny falls off the tree. Finny is an exceptional athlete and has jumped off the tree many times. In his mind nothing like this could ever happen, he’s done things like this many times before, and has done them well. Falling off the tree could have never been his fault and he knew that. That is why he looked at Gene with â€Å"extreme interest† as he fell. Somewhere in his mind he felt that Gene could have been responsible for this but he didn’t want to believe this and chose not to. He could not believe that his best friend could have pushed him off the tree which led could have led to things for more severe than broken legs. When Gene tells Finny that he was responsible for his fall Finny continues to deny this and even apologizes for thinking Gene could have been responsible. Later on in the book when Brinker tries to find the truth about the fall and Finny has no choice but to accept the truth he continues to deny it. Rather than hearing all of the truth, that Gene was responsible for his fall, which would destroy his world he decides to leave the presence of everyone else. Finny’s suspicions were right but he, the innocent boy, can’t accept that anybody would be cruel enough to push him off the tree. As he takes the stairs to leave, he slips and falls. This fall would later be the cause of his death. Finny refuses to grow up, and accept the events taking place in his life, regardless of the evidence that shows his perfect world has many imperfections. His clouded judgement and refusal to accept the truth and evolve eventually leads to his death. Leper’s loss is portrayed through his insanity. Leper was once a sane, quiet boy who was interested in skiing, and went to school with Gene, and Finny. One day Leper found out that the army had skiing patrol and his passion for skiing lead to him enlisting in the army. Leper’s decision to enlist in the army was not influenced by the possible consequences and responsibilities of the war but by his passion to ski. Leper was not aware of the reality of the war, and what was going to happen once he enlisted. His innocence led him to believe that nothing bad could come from the war and he would only be skiing. Once he faced the reality of the war Leper could not handle it. The traumatic experiences from the war led to his insanity and him leaving the war. Leper was a timid, innocent boy who had not been exposed to the horrors of the real world and the war. Once he enlisted he had to face a world that he could not handle, his innocence was lost. In A Separate Peace three boys, Finny, Gene, and Leper all experience a â€Å"Fall from Innocence. † The three characters have to deal with circumstances they have never dealt with before. Not prepared to handle these events they experience a â€Å"Fall from Innocence. †

Human Rights And The United Nations - 959 Words

Human Rights is a conceptual idea that no matter who we are and where we are born every human is entitled to basic rights and freedoms. Human rights are not privileges and cannot be granted or revoked. They are inalienable and universal. The concept is thought provoking but becomes difficult once put into practice. This is because rights and freedoms are defined differently across societies and cultures. Different societies dictate how their people are treated and what their rights are. Key factors of implementing the idea of universal human rights must be questioned. These questions are; what constitutes basic human rights, who get to pick them, and who enforces them and how? Societies throughout history have exemplified how difficult defining and implementing valid rights and justices can be. The most modern example of an assembly defining and trying to enforce laws is the United Nations. The United Nations emerged from the ruins of WWII. The treaty that established the UN reaffirms faith in fundamental human rights. In 1948, the UN General Assembly adopted the Universal Declaration of Human Rights. This document lays the basis for modern international human rights law. The declaration lists 30 articles recognizing different aspects of human rights. Some principles include (1) all human beings are born free and equal in dignity and rights, (7) are free from discrimination, (3) given the right to life, liberty and personal security, (4) and the freedom from slavery orShow MoreRelatedHuman Rights And The United Nations2206 Words   |  9 PagesWhat are human rights? Some might ask. Human rights is a right that is believed to belong justifiably to every pe rson. But not everyone has these rights. How would you like to wake up everyday and hear gunshots and hearing a rocket hitting a buildings and your mom and dad hiding under a table. Then have strangers coming to your house and taking away your family. That is what the people in Syria feel like for the past 5 years. Things have gotten worse ever since ISIS came along and took over the areaRead MoreThe Human Rights Of The United Nations2236 Words   |  9 PagesI Introduction The term ‘human rights’ is difficult to define, but generally they are regarded as those fundamental and inalienable rights which are essential for life. They are rights inherent, interdependent, and indivisible to all human beings. This means they cannot be granted or taken away and include rights such as civil, political, economic, social and cultural rights. Each act of torture and ill-treatment, inflicted by one human being upon another, permanently scars all those touched byRead MoreThe Universal Human Rights Of The United Nations873 Words   |  4 PagesThe Universal Human Rights: From Paper to Reality According to the Office of High Commissioner of Human Rights of the United Nations, â€Å"human rights are rights inherent to all human beings, whatever our nationality, place of residence, sex, national or ethnic origin, color, religion, language, or any other status. We are all equally entitled to our human rights without discrimination. These rights are all interrelated, interdependent and indivisible† (United Nations Human Rights). In other wordsRead MoreThe United Nations Declaration Of Human Rights1498 Words   |  6 PagesDo you believe that there is a universal human rights regime or that human rights are more regional in nature? I argue that human rights are more regional in nature, due to three specific factors; economic development, political discourse and cultural relativism. The United Nations Declaration of Human Rights (UDHR) was created in the wake of the utter destruction that was World War Two. Constructed in 1948, it was the result of a collaboration between forty-eight countries. Though not legallyRead MoreHuman Trafficking : The United Nations Human Rights1162 Words   |  5 PagesQuin Smith and Colin Grande Federal Republic of Germany United Nations Human Rights Council The Athenian Academy Human Trafficking Quin Smith Intro Human trafficking is one of the biggest human rights issues facing our world today. This practice makes much money for those who traffic humans, and destroys the lives of its victims. Brothels have been legal in Germany since 2002, and it is no coincidence that Germany s largest brothel is just a few miles drive from the French border. 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A good addition to this webpage that would make it easier to read would be to shorten the paragraphs and configure charts. As it stands now, although it is an excellent website it could do with some improvements I would like to provide you with the best options for achieving an even greater website. Areas of improvement Most notably it is gaining the

Racism Is The Belief Of All Members Of A Specific Race

Racism is the belief of all members of a specific race to have the same specific characteristics or abilities to that ethnicity group. Racism is directed towards a specific person’s race based on the belief that one’s race is superior to the other. Racism has been a big issue ever since history could recall. Wherever there are different racial kinds of people, there would be racism. How does history, global issues, and societal up bringing affect racism in our current society. The history of racism started in the seventeenth century, when the Europeans came to North America; they wanted to conquer this new found land as their own, but there were already people inhabiting the land, the Native Americans. The Native Americans were viewed as blood thirsty savages and uncivilized in the eyes of the Europeans and their cultures, thus leading to genocide and mass murder in the attempt to wipe out the Native Americans and truly claim the land as their own. These discriminating views on the Native Americans carry over to today’s time. â€Å"Native Americans have the highest suicide rate in the United States according to the National institute of Mental Health† (S. Siddiqui, para 2). In addition, in the seventeenth century; Africans were kidnapped from different parts Africa, and were brought over to America as slaves. Some of these Africans were considered royalty in Africa but due to prejudice, these darker pigmented skinned people were viewed inferi or in comparison to the EuropeanShow MoreRelatedRacism : Racism And Racial Discrimination1425 Words   |  6 PagesRacism consists of ideologies and practices that seek to justify, or cause, the unequal distribution of privileges, rights or goods among different racial groups. Modern variants are often based in social perceptions of biological differences between peoples. These can take the form of social actions, practices or beliefs, or political systems that consider different races to be ranked as inherently superior or inferior to each other, based on presumed shared inheritable traits, abilities, or qualitiesRead MoreThe Oxford Dictionary Defines Racism As â€Å"Prejudice, Discrimination,1133 Words   |  5 PagesOxford Dictionary defines racism as â€Å"Prejudice, discrimination, or antagonism directed against someone of a different race based on the belief that one s own race is superior.† If further defines the same as â€Å"The belief that all members of each ra ce possess characteristics, abilities, or qualities specific to that race, especially so as to distinguish it as inferior or superior to another race or races.† (Oxford Dictionaries | English, 2017).There are different types of racism based on religion, nationalityRead MoreEssay on Analysis of Appiah ´s View of Racism 850 Words   |  4 PagesIn this paper I will be arguing that racist beliefs are cognitive problems according to Appiah’s account of racisms. 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In this paper, the discussion will be done on the social construction of race and gender andRead MoreDefinition Essay On Racism1005 Words   |  5 PagesThroughout society, the definition of racism varies drastically. Some people would define it as its definition, one race against another, then there are the other uninformed members of society who would define it as blacks against whites, but in all reality it’s any race against another. Though racism is usually defined as antagonism directed against someone of a different race based on the belief that ones own race is superior, this definition would mean one race hating another, a more accurateRead MoreRacism Is Not A Physical Action1533 Words   |  7 Pagesslavery, but also from institutionalized racism in the school system. Racism is more than a single person s actions towards another based on skin color. 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Racism is the belief that all members of each race possess characteristics or abilities specific to that race, especially so as to distinguish it asRead MoreThe Problem of Racial Discrimination1578 Words   |  6 PagesAssignment 2 Introduction Throughout the course of time, racial discrimination has been a part of the challenges facing all societies. This is because various groups in society began to spend increasing amounts of time working with individuals that shared similar ideas and characteristics as themselves. Over the course of time, this created various feelings about one group over that of the other. At the same time, feelings of jealousy and resentment fueled animosity between racial groups. 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Although the subculture groups follow the same laws and rules of the community, they share a distinctive set of

Essay on Identity Culture and Organization - 1986 Words

The primary goal for this essay is to discuss about the impacts of social media to the organizational culture in this modern business environment. The reasons to conduct this essay are firstly, the diffusion of social media have been focused specifically in relationship for organizations and the stakeholders. Secondly, the business organizations have been involving themselves to social media, for example, building its own community to their customers through Facebook and Twitter. Lastly, there are rare of proper evidences to prove the functionality and its limitation about social media to organizational culture. Therefore, in order to examine the topic comprehensively, certain relevant materials from journals, books, news and†¦show more content†¦From above, this can be identified that the ‘interaction’ is the key terms which shared by such definitions. Yet, will the organizational culture, especially the ‘interaction’, change its pattern by other factors? Indeed, not only the organization itself but its culture also had been transformed in this business world from time to time due to the globalization factor and the adoption of new technology (Kabasakal, Asugnab and Develioglu, 2006; Mills, 2010; Schein, 2010). Specially, through the emergence of technology in first generation of World Wide Web to the second generation (aka ‘Web 2.0’), the rapid development of social networking sites or social media and the Internet-based electronic commerce (aka ‘e-commerce’) had been changed the communication medium of an organization from traditional face to face style to the computer mediated communication style (Canessa and Riolo, 2003; Kabasakal et al., 2006; Harrison and Thomas, 2009; Mills, 2010). Such communication pattern not merely changes from the organization internally, but also externally, usually refers to customers. Undeniably, these led more and more organizations nowadays to adopt the use of social medias in latest forms to operate in their business routines, despite the fact that they had been tend to be costly, the effectiveness of the social medias as well as the efficiency helped the organization to deal with this cruel competitive businessShow MoreRelatedEffective Leadership Has Influenced The Organization s Culture And How Does Their Influence Shape Organisations Identity And924 Words   |  4 PagesOrganisation’s Culture and how does their influence Shape the of Organisations identity and Future? INTRODUCTION: Recently, researches have shown an increased interest in understanding the factual influence that leaders could do on the organizations. Undoubtedly, leaders play a critical role in the organization that they lead. More importantly the the changing nature of the economy that needs leaders to be aware of the dynamics that are essential for managing and leading organizations in the competitiveRead MoreCulture Can Be Both An Asset And A Liability1571 Words   |  7 PagesQuestion: Culture can be both an asset and a liability to an organisation Ravasi and Schultz (2006) wrote that Organizational culture is shared values and ideas that guide appropriate behaviour for various situations in the organization. Culture is created for people in an organization to behave consistently, which encompasses identical values, beliefs and principles of all the members (Needle 2010). Therefore, the culture in an organization can affect the ways of its members in work strategy andRead MoreLeadership Influences Organizational Culture And Employee Commitment1502 Words   |  7 Pagesunderstanding the mechanisms and processes through which leadership influences organizational culture and employee commitment, in order to develop a more complete understanding of the inner workings of leadership† (Bass, as cited by Aolio et al 2004 p.952) . Ellemers, Gilder, and Haslam (2004) agree that â€Å"additional understanding of work motivation can be gained by incorporating insights into social identity processes† (p. 459). Since motiv ational processes may be processed in group contexts, similarlyRead MoreThe Six Levers For Managing Organizational Culture1167 Words   |  5 PagesWithin organizations, large and small, there exists a sense of identity among its members that separates it from other organizations. This sense of identity is known as organizational culture. All over, managers seek to influence and change this into something that can be beneficial for the organization. In his article, â€Å"The Six Levers for Managing Organizational Culture†, Professor David W. Young defines the different elements that can influence and change the culture within the organization andRead MoreQuestions On Organizational Communication Concepts Essay1559 Words   |  7 PagesElements: According to Keyton (n.d.), organizational culture is defined as â€Å"the set of artifacts, values and assumptions that emerges from the interactions of organizational members† (p. 550). Some examples of artifacts and valu es include, norms, customs, how members should behave, and assumptions are revealed when talking about your work experiences. The culture of an organization can be simply what it feels like to be there (Keyton, n.d.). Every culture is dynamic, always changing and guides the constructionRead MoreCultural Identity In Unashamed By Lecrae741 Words   |  3 PagesLit Review Essay Cultural identity is the foundation in which identification is used to express his or her role in society. The distinction of cultural identity among a society affects a person’s role by pertaining to art and literature, as well as social organization element of culture. These examples of culture, refer to people all around the world. In the Story, Left behind, a native American student attending school is judged based on his ethnicity. In Unashamed by Lecrae, Lecrae uses musicRead MoreReading Work : In The New Workplace Centers Around Five Adult Educators1584 Words   |  7 Pagesmore important than stopping their work to do paperwork. Belfiore deduces that there were many instances when the value of documentation was not communicated to the employees. Because of these contradictions, Triple Z is a classic example of an organization in need of literacy training. Texco Texco is a multi-national company selling niche fabrics worldwide. Like Triple Z, documentation impacts everyone, and many contradictions are noted. Supervisors want the production line to reach daily quotasRead MoreToms of Maine Case Study666 Words   |  3 PagesToms of Maine Case Study Organizational culture is the basic pattern of shared assumptions that have been created by the corporation to enable the employees in the organization to have a shared norm. 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Particularly in the Political Systems metaphor, this review will evaluate how the two sources of power can contribute to functional identity, conflict, self-interestRead MoreWhat Makes A Successful Business?1136 Words   |  5 Pagesbusiness, one must understand the importance of bringing diversity into the workforce. To be able to obtain knowledge and strength from others individual traits shows deep facets in character. These traits show when working with individuals of many cultures and backgrounds in the workplace. A leader who has this ability can handle everyone uniquely and ethically and is in tune with what differentiates one associate from the next. Once one has a grasp on who they are then can one expect to lead a diverse

Water Level Warning by Gsm Free Essays

CHAPTER 1 INTRODUCTION Our entire project is based upon Embedded Systems. In this project we are using Microcontroller which controls all the operations in regarding the level of water in the dam. For this process we require the components such as microcontroller, GSM modem, control circuitry, power supply and three sensors. We will write a custom essay sample on Water Level Warning by Gsm or any similar topic only for you Order Now These three sensors are placed in three different threshold levels and are connected to the controller. If for suppose the level of water is being increasing in the dam, then immediately when the water level crossed the sensor at level-1, the information is passed to the controller and then the controller checks for the precaution instruction which is given a by the developer and forwards it to the GSM modem. The modem immediately sends that particular SMS to the mobiles for which it is assigned saying that â€Å"the Water level has crossed the threshold level-1†. The controlling part of the water level is also done by the controller through the instructions given by the developer. This includes the operations such as the number of gates to be opened, the number of threshold levels that are crossed. In this process the controller checks the number of threshold levels that are crossed and according to that the gates are being controlled. 1. 1 Embedded System Embedded systems are electronic devices that incorporate microprocessors with in their implementations. Embedded systems designers usually have a significant grasp of hardware technologies. They use specific programming languages and software to develop embedded systems and manipulate the equipment. Embedded systems often use a (relatively) slow processor and small memory size to minimize costs. An embedded system is a special-purpose system in which the computer is completely encapsulated by or dedicated to the device or system it controls. Unlike a general-purpose computer, such as a personal computer, an embedded system performs one or a few pre-defined tasks, usually with very specific requirements. Since the system is dedicated to specific tasks, design engineers can optimize it, reducing the size and cost of the product. Embedded systems are often mass-produced, benefiting from economies of scale. . 2 GSM Technology Global System for Mobile Communication (GSM) is a set of ETSI standards specifying the infrastructure for a digital cellular service. GSM (Global System for Mobile communication) is a digital mobile telephone system that is widely used in many parts of the world. GSM uses a variation of Time Division Multiple Access (TDMA) and is the most widely used of the thr ee digital wireless telephone technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot. GSM operates in the 900MHz, 1800MHz, or 1900 MHz frequency bands. GSM (Global System for Mobile communications) is the technology that underpins most of the world’s mobile phone networks. The GSM platform is a hugely successful wireless technology and an unprecedented story of global achievement and cooperation. GSM has become the world’s fastest growing communications technology of all time and the leading global mobile standard, spanning 218 countries. GSM is an open, digital cellular technology used for transmitting mobile voice and data services. GSM operates in the 900MHz and 1. GHz bands GSM supports data transfer speeds of up to 9. 6 kbps, allowing the transmission of basic data services such as SMS. Everyday, millions of people are making phone calls by pressing a few buttons. Little is known about how one person’s voice reaches the other person’s phone that is thousands of miles away. Even less is known about the security measures and protection b ehind the system. The complexity of the cell phone is increasing as people begin sending text messages and digital pictures to their friends and family. The cell phone is slowly turning into a handheld computer. All the features and advancements in cell phone technology require a backbone to support it. When a mobile subscriber roams into a new location area (new VLR), the VLR automatically determines that it must update the HLR with the new location information, which it does using an SS7 Location Update Request Message. The Location Update Message is routed to the HLR through the SS7 network, based on the global title translation of the IMSI that is stored within the SCCP Called Party Address portion of the message. The HLR responds with a message that informs the VLR whether the subscriber should be provided service in the new location. . 3 Micro controller Microcontrollers as the name suggests are small controllers. They are like single chip computers that are often embedded into other systems to function as processing/controlling unit. Microcontroller – A single chip used to control other devices. Any microcomputer system requires memory to store a sequence of instructions making up a program, parallel port or serial port for communicating with an external system, timer / counter for control purposes like generating time delays, Baud rate for the serial port, apart from the controlling unit called the Central Processing Unit. CHAPTER 2 DESCRIPTION OF PROJECT 2. 1 Block diagram and description [pic] Fig 2. 1 Block Diagram of dam level warning using GSM SMS In this block diagram we are using microcontroller, GSM modem, LCD, power supply, MAX-232, control circuitry, liquid level indicator. These all are mentioned below. Description The main aim is to send SMS when ever the water level crosses the threshold level. And necessary precautions are taken when ever the water exceeds the last level. To send an SMS to the concerned person we have certain steps to follow. In-order to work with any components basic requirement is power supply. Now the aim is to design the power supply section which converts 230V AC in to 5V DC. Since 230V AC is too high to reduce it to directly 5V DC, therefore we need a step-down transformer that reduces the line voltage to certain voltage that will help us to convert it in to a 5V DC. There are many types of power supply. Most are designed to convert high voltage AC mains electricity to a suitable low voltage supply for electronics circuits and other devices. A power supply can by broken down into a series of blocks, each of which performs a particular function. This power supply is connected to the micro controller. In a very simplistic form, a micro-controller system can be viewed as a system that reads from (monitors) inputs, performs processing and writes to (controls) outputs. Micro controllers are useful to the extent that they communicate with other devices, such as sensors, motors, switches, keypads, displays, memory and even other micro-controllers. Next input should be given to the microcontroller it is done by the level indicator. Level indicator has certain levels when the water touches the different levels of level indicator the micro controller takes the input as the level indicator is connected to the ports. This information is displayed on the LCD. When the LCD is ON the GSM (Global System for Mobile communication) gets activated by sending some commands to the microcontroller. For communication with the micro controller MAX 232 is used. This is used to convert the voltage level that is required for GSM, then the SMS is passed to the person or concerned authority using the GSM. For controlling the system we are using motors. Motors act as relays, which is an ON OFF switch. Through this relay action the motors work and controlling of the gates can be done. Hardware components 1. Power supply 2. micro controller 3. level indicator 4. MAX 232 5. GSM(Global system for Mobile communication) Modem 6. LCD(liquid crystal display) 7. control system 2. 2 Power supply The power supplies are designed to convert high voltage AC mains electricity to a suitable low voltage supply for electronics circuits and other devices. A power supply can by broken down into a series of blocks, each of which performs a particular function. A d. c power supply which maintains the output voltage constant irrespective of a. c mains fluctuations or load variations is known as â€Å"Regulated D. C Power Supply†. For example a 5V regulated power supply system as shown below: [pic] Fig 2. 2 5V regulated power supply system The regulated DC output is very smooth with no ripple. It is suitable for all electronic circuits. 2. 2. 1 Transformer Transformers convert AC electricity from one voltage to another with little loss of power. Transformers work only with AC and this is one of the reasons why mains electricity is AC. Step-up transformers increase voltage, step-down transformers reduce voltage. Most power supplies use a step-down transformer to reduce the dangerously high mains voltage (230V in UK) to a safer low voltage. Transformers waste very little power so the power out is (almost) equal to the power in. Note that as voltage is stepped down current is stepped up. 2. 2. 2 Rectifier A circuit which is used to convert a. c to dc is known as â€Å"rectifier†. The process of conversion a. c to d. is called â€Å"rectification† Types of rectifier: †¢ Half wave Rectifier †¢ Full wave rectifier 1. Centre tap full wave rectifier. 2. Bridge type full bridge rectifier. Bridge Rectifier: A bridge rectifier makes use of four diodes in a bridge arrangement to achieve full-wave rectification. This is a widely used configuration, both with individual diodes wired as shown and with single compone nt bridges where the diode bridge is wired internally. A bridge rectifier makes use of four diodes in a bridge arrangement as shown in fig below to achieve full-wave rectification. This is a widely used configuration, both with individual diodes wired as shown and with single component bridges where the diode bridge is wired internally. [pic] Fig 2. 2. 2 Bridge Rectifier arrangement 2. 2. 3 Filter A Filter is a device which removes the a. c component of rectifier output but allows the d. c component to reach the load. We have seen that the ripple content in the rectified output of half wave rectifier is 121% or that of full-wave or bridge rectifier or bridge rectifier is 48% such high percentages of ripples is not acceptable for most of the applications. Ripples can be removed by one of the following methods of filtering. †¢ A capacitor, in parallel to the load, provides an easier by –pass for the ripples voltage though it due to low impedance. At ripple frequency and leave the d. c. to appears the load. †¢ An inductor, in series with the load, prevents the passage of the ripple current (due to high impedance at ripple frequency) while allowing the d. c (due to low resistance to d. c) 2. 2. 4 Regulator Voltage regulator ICs is available with fixed (typically 5, 12 and 15V) or variable output voltages. The maximum current they can pass also rates them. Negative voltage regulators are available, mainly for use in dual supplies. Most regulators include some automatic protection from excessive current (‘overload protection’) and overheating (‘thermal protection’). Many of the fixed voltage regulator ICs has 3 leads and look like power transistors, such as the 7805 +5V 1A regulator shown on the right. The LM7805 is simple to use. You simply connect the positive lead of your unregulated DC power supply (anything from 9VDC to 24VDC) to the Input pin, connect the negative lead to the Common pin and then when you turn on the power, you get a 5 volt supply from the output pin. Regulator eliminates ripple by setting DC output to a fixed voltage. [pic] Fig 2. 2. 4 Regulator 2. 3 Micro controller (AT89C51) In this project work we are using AT89C51 micro-controller. This micro-controller plays a major role. Micro-controllers were originally used as components in complicated process-control systems. However, because of their small size and low price, Micro-controllers are now also being used in regulators for individual control loops. In several areas Micro-controllers are now outperforming their analog counterparts and are cheaper as well. A Micro controller consists of a powerful CPU tightly coupled with memory RAM, ROM or EPROM), various I / O features such as Serial ports, Parallel Ports, Timer/Counters, Interrupt Controller, Data Acquisition interfaces-Analog to Digital Converter (ADC), Digital to Analog Converter (ADC), everything integrated onto a single Silicon Chip. It does not mean that any micro controller should have all the above said features on chip, Depending on the need and area of application for which it is designed, The ON-CHIP features present in it may or may not include all the individual section said above. Any microcomputer system requires memory to store a sequence of instructions making up a program, parallel port or serial port for communicating with an external system, timer / counter for control purposes like generating time delays, Baud rate for the serial port, apart from the controlling unit called the Central Processing Unit 2. 3. 1 Features 1. 8 Bit CPU optimized for control applications 2. Extensive Boolean processing (Single – bit Logic) Capabilities. 3. On – Chip Flash Program Memory 4. On – Chip Data RAM 5. Bi-directional and Individually Addressable I/O Lines 6. Multiple 16-Bit Timer/Counters . Full Duplex UART 8. Multiple Source / Vector / Priority Interrupt Structure 9. On – Chip Oscillator and Clock circuitry. 10. On – Chip EEPROM 11. One Serial communication port 2. 3. 2 Block diagram of 89C51 Fig 2. 3. 2 Block diagram of microcontroller 89C51 SERIES: 89C51 Family, TECHNOLOGY: CMOS This microcontroller had 128 bytes of RAM,4K bytes of on-chip ROM, two timers, one serial port and 4 ports(each 8-bits wide)all on single chip. At that time it was also referred to as a â€Å"system on a chip†. The 8051 is an 8-bit processor, meaning that the CPU can work on only 8-bits of data at time. Data larger than 8-bits has to be broken into 8-bit pieces to be processed by the CPU. The 8051 can have a maximum of 64K bytes of ROM, many manufacturers have put only 4Kbytes on chip. The P89C51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16-bit timer/counters, five vector two-level interrupt architecture, a full duplex serial port, and on-chip oscillator and clock circuitry. In addition, the P89C51 is designed with static logic for operation down to zero frequenc and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The Power-down Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset. 2. 3. 3 Memory organization Program Memory Figure below shows a map of the lower part of the program memory. After reset, the CPU begins execution from location 0000H. As shown in fig. , each interrupt is assigned a fixed location in program memory. The interrupt causes the CPU to jump to that location, where it executes the service routine. External Interrupt 0, for example, is assigned to location 0003H. If External Interrupt 0 is used, its service routine must begin at location 0003H. If the interrupt is not used, its service location is available as general purpose. Program memory addresses are always 16 bits wide, even though the actual amount o program memory used may be less than 64Kbytes. External program execution sacrifices two of the 8-bit ports, P0 and P2, to the function of addressing the program memory. [pic] Fig 2. 3. 3 Program Memory 2. 3. 4 Pin diagram of 89C51 [pic] Fig 2. 3. 4 Pin Diagram of AT89C51 2. . 5 Pin description Vcc Pin 40 provides supply voltage to the chip. The voltage source is +5v. Gnd Pin 20 is the ground. Ports 0, 1, 2 and 3 As shown in pin diagram the four ports P0, P1, P2, and P3 each use of 8 pins making the 8-bit ports. All the ports upon Reset are configured as input, since P0-P3 have FFH on them. Port 0 Port 0 occupies a total of 8 pins (pins 32-33). It can be used for input or ou tput. Port0 is also designated as AD0-AD7, allowing it to be used for both address and data. When connecting an 8051/31 to an external memory, port 0 provides both address and data. The 8051 multiplexes address and data through port 0 to save pins. ALE=0, it provides data D0-D7, but when ALE=1, it has address A0-A7. Therefore, ALE is used for demultiplexing address address and data with the help of a 74LS373 latch. In the 8051-based systems where there is no external memory connection, the pins of P0 must be connected externally to a 10k –ohm pull-up resistor. This is due to the fact that P0 is an Open drain, Unlike P1, P2, P3. Open drain is a term used for Mos chips in the same way that open collector is used for TTL chips. In many systems using the 8751, 89C51, or DS89C4x0 chips, we normally connect P0 to pull-up resistors. With external pull-up resistors connected to P0, it can be used as a simple I/O port, just like P1 and P2. In contrast to Port 0, ports p1, p2, and p3 do not need any pull-up resistors since they already have pull-up resistors internally. Upon reset, ports p1, p2, ad p3 are configured as input ports. Port 1 Port 1 occupies a total of 8-pins (pins1-8). It can be used as input or output. In contrast to port 0, this port does not need any pull-up resistors since it already has pull-up resistors internally. Upon reset, port1 is configured as an input port. Port 2 Port 2 occupies a total 8 pins (pins 21-28). It can be used as input or output. However, in 8031-based systems, port2 is also designatedas A8-A15, indicating its dual function. Since an 8051/31 is capable of accessing 64K bytes of external memory, it needs a path for the 16 bits of the address. While P0 provides the lower 8 bits via A0-A7, it is the job of p2 is used for the upper 8 bits of the 16-bit address, and it cannot be used for I/O. Just like P1, port 2 does not need any pull-up resistors since it already has pull-up resistors internally. Upon reset, port2 is configured as an input port. Port 3 Port 3 occupies a total of 8 pins (pins 10-17). It can be used as input or output. P3 does not need any pull-up resistors, just as P1 and P2 did not. Although Port 3 is configured as an input port upon reset, this is not the way it is most commonly used. Port 3 has the additional function of providing some extremely important signals such as interrupts. The below table provides these alternate functions of P3. This is information applies to both 8051 and 8031 chips. Port 3 also receives some control signals for Flash programming and verification. RST Reset input. A high on this pin for two machine cycles while the oscillator is running resets the device. ALE/PROG Prior to each reading from external memory, the microcontroller will set the lower address byte (A0-A7) on P0 and immediately after that activates the output ALE. Upon receiving signal from the ALE pin, the external register (74HCT373 or 74HCT375 circuit is usually embedded) memorizes the state of P0 and uses it as an address for memory chip. In the second part of the microcontroller’s machine cycle, a signal on this pin stops being emitted and P0 is used now for data transmission (Data Bus). In his way, by means of only one additional (and cheap) integrated circuit, data multiplexing from the port is performed. This port at the same time used for data and address transmission. PSEN Program Store Enable is the read strobe to external program memory. When the AT89C51 is executing code from external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory. EA/VPP External Access Enable (EA). EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. Note, however, that if lock bit 1 is programmed, EA will be internally latched on reset. EA should be strapped to VCC for internal program executions. This pin also receives the 12-volt programming enable voltage (VPP) during Flash programming, for parts that require 12-volt VPP. XTAL1 and XTAL2 The 8051 has an on-chip oscillator but requires an external clock to run it. Most often a quartz crystal oscillator is connected to inputs XTAL1 (pin19) and XTAL2 (pin18). The quartz crystal oscillator connected to XTAL1 and XTAL2 also needs two capacitors of 30pf value. One side of each capacitor is connected to the ground. It must be noted that there are various speeds of the 8051 family. Speed refers to the maximum oscillator frequency connected to XTAL. For example, a 12-MHz chip must be connected to a crystal with 12 MHz frequency of no more than 20 MHz. When the 8051 is connected to a crystal oscillator and is powered up, we can observe the frequency on the XTAL2 pin using the oscilloscope. 2. 3. 6 Timers On-chip timing/counting facility has proved the capabilities of the microcontroller for implementing the real time application. These includes pulse counting, frequency measurement, pulse width measurement, baud rate eneration, etc,. Having sufficient number of timer/counters may be a need in a certain design application. The 8051 has two timers/counters. They can be used either as timers to generate a time delay or as counters to count events happening outside the microcontroller. Let discuss how these timers are used to generate time delays and we will also discuss how they are been used as even t counters. 2. 3. 7 Polling In polling the microcontroller continuously monitors the status of a given device; when the status condition is met, it performs the service . After that, it moves on to monitor the next device until each one is serviced. Although polling can monitor the status of several devices and serve each of them as certain condition are met. 2. 3. 8 Interrupts In the interrupts method, whenever any device needs its service, the device notifies the microcontroller by sending it an interrupts signal. Upon receiving an interrupt signal, the microcontroller interrupts whatever it is doing and serves the device. The program associated with the interrupts is called the interrupt service routine (ISR). or interrupt handler. Six Interrupts in the 8051: 1. In reality, only five interrupts are available to the user in the 8051, but many manufacturers’ data sheets state that there are six interrupts since they include reset . the six interrupts in the 8051 are allocated as above. 2. Reset. When the reset pin is activated, the 8051 jumps to address location 0000. this is the power-up reset. 3. Two interrupts are set aside for the timers: one for Timer 0 and one for Timer 1. Memory location 000BH and 001BH in the interrupt vector table belong to Timer 0 and Timer 1, respectively. 4. Two interrupts are set aside for hardware external harder interrupts. Pin number 5. 12(P3. 2) and 13(P3. 3) in port 3 are for the external hardware interrupts INT0 and INT1,respectively. These external interrupts are also referred to as EX1 and EX2. Memory location 0003H and 0013H in the interrupt vector table are assigned to INT0 and INT1, respectively. 6. Serial communication has a single interrupt that belongs to both receive and transmit. The interrupt vector table location 0023H belongs to this interrupt. 2. 3. 9 Registers In the CPU, registers are used to store information temporarily. That information could be a byte of data to be processed, or an address pointing to the data to be fetched. The vast majority of 8051 registers are 8–bit registers. In the 8051 there is only one data type: 8bits. The 8bits of a register are should in the diagram from the MSB (most significant bit) D7 to the LSB (least significant bit) D0. With an 8-bit data type, any data larger than 8bits must be broken into 8-bit chunks before it is processed. Since there are a large number of registers in the 8051, we will concentrate on some of the widely used general-purpose registers. D7 |D6 |D5 |D4 |D3 |D2 |D1 |D0 | The most widely used registers of the 8051 are A(accumulator), B, R0, R1, R2, R3, R4, R5, R6, R7, DPTR(data pointer), and PC(program counter). All of the above registers are 8-bits, except DPTR and the program counter. The accumulator, register A, is used for all arithmetic and logic instructions. 2. 3. 10 Serial communication Computers can transfer data in two ways: paralle l and serial. In parallel data transfers, often 8 or more lines (wire conductors) are used to transfer data to a device that is only a few feet away. Examples of parallel transfers are printers and hard disks; each uses cables with many wire strips. Although in such cases a lot of data can be transferred in a short amount of time by using many wires in parallel, the distance cannot be great. To transfer to a device located many meters away, the serial method is used. In serial communication, the data is sent one bit at a time, in contrast to parallel communication, in which the data is sent a byte or more at a time. Serial communication of the 8051 is the topic of this chapter. The 8051 has serial communication capability built into it, there by making possible fast data transfer using only a few wires. Serial data communication uses two methods, asynchronous and synchronous. The synchronous method transfers a block of data at a time, while the asynchronous method transfers a single byte at a time. The 8051 transfers and receives data serially at many different baud rates. The baud rate in the 8051 is programmable. This is done with the help of Timer1. The 8051 divides the crystal frequency by 12 to get the machine cycle frequency. The 8051’s serial communication UART circuitry divides the machine cycle frequency of 921. 6 kHz divided by 32 once more before it is used by Timer 1 to set the Baud rate. SBUF register SBUF is an 8-bit register used solely for serial communication in the 8051. For a byte of data to be transferred via the TXD line, it must be placed in the SBUF register. Similarly, SBUF holds the byte of data when it is received by the 8051’s RXD line. SBUF can be accessed like any other register in the 8051. The moment a byte is written into SBUF, it is framed with the start and stop bits and transferred serially via the TXD pin. Similarly, when the bits are received serially via RXD, the 8051 defames it by eliminating the stop and start bits, making a byte out of the data received, and then placing it in the SBUF. SCON (serial control) register The SCON register is an 8-bit register used to program the start bit, stop bit, and data bits of data framing, among other things. Transmit In mode0 the data transmission in form of pulse train automatically starts on the pin RXD at the moment the data has been written to the SBUF register. In fact, this process starts after any instruction being performed on this register. Upon all 8 bits have been sent, the bit TI in the SCON register is automatically set. In mode1 a sequence for data transmission via serial communication is automatically started upon the data has been written to the SBUF register. End of 1 byte transmission is indicated by setting the TI bit in the SCON register. In mode2 TI (transmit interrupt) is bit D1 of the SCON register. This is an extremely important flag bit in the SCON register. When the 8051 finishes the transfer of the 8-bit character, it raises the TI flag to indicate that it is ready to transfer another byte. The TI bit is raised at the beginning of the stop bit. Receive In mode0 data receiving starts through the pin RXD once two necessary conditions are met: bit REN=1 and RI=0 (both bits reside in the SCON register). Upon 8 bits have been received, the bit RI (register SCON) is automatically set, which indicates that one byte is received. In mode1 data receiving starts as soon as the START bit (logic zero (0)) appears on the pin RXD. The condition is that bit REN=1and bit RI=0. Both of them are stored in the SCON register. The RI bit is automatically set upon receiving has been completed. In mode2 RI (receive interrupt) is the D0 of the SCON register. This is another extremely important flag bit in the SCON register. When the 8051 receives data serially via RXD, it gets rid of the start and stop bits and places the byte in the SBUF register. Then it raises the RI flag bit to indicate that a byte has been received and should be picked up before it is lost. RI is raised halfway through the stop bit. 2. 4 Level Indicator Level indicator is used to indicate the different water levels in the dams. Liquid level indicator is used to indicate the water present at what level. Here we are considering three level Low level . Medium level and High level, as the liquid level increases a message is sent to the concern person regard level of water. The main purpose of this level indicator is it checks the water level and gives the input information to micro controller. 2. 5 MAX 232 The MAX232 from Maxim was the first IC which in one package contains the necessary drivers (two) and receivers (also two), to adapt the RS-232 signal voltage levels to TTL logic. It became popular, because it just needs one voltage (+5V) and generates the necessary RS-232 voltage levels (approx. 10V and +10V) internally. This greatly simplified the design of circuitry. Circuitry designers no longer need to design and build a power supply with three voltages (e. g. -12V, +5V, and +12V), but could just provide one +5V power supply, e. g. with the help of a simple 78Ãâ€"05 voltage converter. The MAX232 has a successor, the MAX232A. The ICs are almost identical, however, the MAX232A is much more often used (and easier to get) than the original MAX232, and the MAX232A only needs external capacitors 1/10th the capacity of what the original MAX232 needs. It should be noted that the MAX 232(A) is just a driver/receiver. It does not generate the necessary RS-232 sequence of marks and spaces with the right timing, it does not decode the RS-232 signal, and it does not provide a serial/parallel conversion. â€Å"All it does is to convert signal voltage levels†. The MAX 232(A) has two receivers (converts from RS-232 to TTL voltage levels) and two drivers (converts from TTL logic to RS-232 voltage levels). This means only two of the RS-232 signals can be converted in each direction. The old MC1488/1498 combo provided four drivers and receivers. The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply EIA-232 voltage levels from a single 5-V supply. Each receiver converts EIA-232 inputs to 5-V TTL/CMOS levels. These receivers have a typical threshold of 1. 3 V and a typical hysteresis of 0. 5 V, and can accept  ±30-V inputs. Each driver converts TTL/CMOS input levels into EIA-232 levels. The RS232 standard is not TTL compatible; therefore, it requires a line driver such as the MAX232 chip to convert RS232 voltage levels to TTL levels, and vice versa. The interfacing of 8051 with RS232 connectors via the MAX232 chip is the main topic. The 8051 has two pins that are used specifically for transferring and receiving data serially. These two pins are called TXD and RXD and a part of the port 3 group (P3. 0 and P3. 1). Pin 11 of the 8051 is assigned to TXD and pin 10 is designated as RXD. These pins are TTL compatible; therefore, they require a line driver to make them RS232 compatible. One such line driver is the MAX232 chip. [pic] Fig 2. 5 8051 connection to RS232 MAX232 converts from RS232 voltage levels to TTL voltage levels, and vice versa. One advantage of the MAX232 chip is that it uses a +5V power source which, is the same as the source voltage for the 8051. In the other words, with a single +5V power supply we can power both the 8051 and MAX232, with no need for the power supplies that are common in many older systems. The MAX232 has two sets of line drivers for transferring and receiving data. The line drivers used for TXD are called T1 and T2, while the line drivers for RXD are designated as R1 and R2. In many applications only one of each is used. 2. 6 GSM (Global system for mobile communication) Modem A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. A GSM modem is a specialized type of modem which accepts a SIM card, and operates over a subscription to a mobile operator, just like a mobile phone. From the mobile operator perspective, a GSM modem looks just like a mobile phone. A GSM modem can be an external modem device, such as the Wavecom FASTRACK Modem. Insert a GSM SIM card into this modem, and connect the modem to an available serial port on your computer. A GSM modem can be a PC Card installed in a notebook computer, such as the Nokia Card Phone. A GSM modem could also be a standard GSM mobile phone with the appropriate cable and software driver to connect to a serial port on your computer. Phones such as the Nokia 7110 with a DLR-3 cable, or various Ericsson phones, are often used for this purpose. A dedicated GSM modem (external or PC Card) is usually preferable to a GSM mobile phone. This is because of some compatibility issues that can exist with mobile phones. For example, if you wish to be able to receive inbound MMS messages with your gateway, and you are using a mobile phone as your modem, you must utilize a mobile phone that does not support WAP push or MMS. This is because the mobile phone automatically processes these messages, without forwarding them via the modem interface. Similarly some mobile phones will not allow you to correctly receive SMS text messages longer than 160 bytes (known as â€Å"concatenated SMS† or â€Å"long SMS†). This is because these long messages are actually sent as separate SMS messages, and the phone attempts to reassemble the message before forwarding via the modem interface. (We’ve observed this latter problem utilizing the Ericsson R380, while it does not appear to be a problem with many other Ericsson models. ) When you install your GSM modem, or connect your GSM mobile phone to the computer, be sure to install the appropriate Windows modem driver from the device manufacturer. To simplify configuration, the Now SMS/MMS Gateway will communicate with the device via this driver. An additional benefit of utilizing this driver is that you can use Windows diagnostics to ensure that the modem is communicating properly with the computer. The Now SMS/MMS gateway can simultaneously support multiple modems, provided that your computer hardware has the available communications port resources. 2. 6. 1 Architecture of GSM network A GSM network is composed of several functional entities, whose functions and interfaces are specified. Figure 1 shows the layout of a generic GSM network. The GSM network can be divided into three broad parts. The Mobile Station is carried by the subscriber. The Base Station Subsystem controls the radio link with the Mobile Station. The Network Subsystem, the main part of which is the Mobile services Switching Center (MSC), performs the switching of calls between the mobile users, and between mobile and fixed network users. The MSC also handles the mobility management operations. Not shown are the Operations A GSM network is composed of several functional entities, whose functions and interfaces are specified. Figure shows the layout of a generic GSM network. The GSM network can be divided into three broad parts. Subscriber carries the Mobile Station. The Base Station Subsystem controls the radio link with the Mobile Station. The Network Subsystem, the main part of which is the Mobile services Switching Center (MSC), performs the switching of calls between the mobile users, and between mobile and fixed network users. The MSC also handles the mobility management operations. Not shown is the Operations intendance Center, which oversees the proper operation and setup of the network. The Mobile Station and the Base Station Subsystem communicate across the Um interface, also known as the air interface or radio link. The Base Station Subsystem communicates with the Mobile services Switching Center across the A interface. [pic] Fig 2. 6. 1 General architecture of a GSM network Mobile Station: The mobile station (MS) consists of the mobile equipment (the terminal) and a smart card called the Subscriber Identity Module (SIM). The SIM provides personal mobility, so that the user can have access to subscribed services irrespective of a specific terminal. By inserting the SIM card into another GSM terminal, the user is able to receive calls at that terminal, make calls from that terminal, and receive other subscribed services. The mobile equipment is uniquely identified by the International Mobile Equipment Identity (IMEI). The SIM card contains the International Mobile Subscriber Identity (IMSI) used to identify the subscriber to the system, a secret key for authentication, and other information. The IMEI and the IMSI are independent, thereby allowing personal mobility. The SIM card may be protected against unauthorized use by a password or personal identity number. Base Station Subsystem: The Base Station Subsystem is composed of two parts, the Base Transceiver Station (BTS) and the Base Station Controller (BSC). These communicate across the standardized Abis interface, allowing (as in the rest of the system) operation between components made by different suppliers. The Base Transceiver Station houses the radio transceivers that define a cell and handles the radio-link protocols with the Mobile Station. In a large urban area, there will potentially be a large number of BTSs deployed, thus the requirements for a BTS are ruggedness, reliability, portability, and minimum cost. The Base Station Controller manages the radio resources for one or more BTSs. It handles radio-channel setup, frequency hopping, and handovers, as described below. The BSC is the connection between the mobile station and the Mobile service Switching Center (MSC). Network Subsystem The central component of the Network Subsystem is the Mobile services Switching Center (MSC). It acts like a normal switching node of the PSTN or ISDN, and additionally provides all the functionality needed to handle a mobile subscriber, such as registration, authentication, location updating, handovers, and call routing to a roaming subscriber. These services are provided in conjunction with several functional entities, which together form the Network Subsystem. The MSC provides the connection to the fixed networks (such as the PSTN or ISDN). Signalling between functional entities in the Network Subsystem uses Signalling System Number 7 (SS7), used for trunk signalling in ISDN and widely used in current public networks. The Home Location Register (HLR) and Visitor Location Register (VLR), together with the MSC, provide the call-routing and roaming capabilities of GSM. The HLR contains all the administrative information of each subscriber registered in the corresponding GSM network, along with the current location of the mobile. The location of the mobile is typically in the form of the signaling address of the VLR associated with the mobile as a distributed database station. The actual routing procedure will be described later. There is logically one HLR per GSM network, although it may be implemented The Visitor Location Register (VLR) contains selected administrative information from the HLR, necessary for call control and provision of the subscribed services, for each mobile currently located in the geographical area controlled by the VLR. Although each functional entity can be implemented as an independent unit, all manufacturers of switching equipment to date implement the VLR together with the MSC, so that the geographical area controlled by the MSC corresponds to that controlled by the VLR, thus simplifying the signalling required. Note that the MSC contains no information about particular mobile stations — this information is stored in the location registers. The other two registers are used for authentication and security purposes. The Equipment Identity Register (EIR) is a database that contains a list of all valid mobile equipment on the network, where each mobile station is identified by its International Mobile Equipment Identity (IMEI). An IMEI is marked as invalid if it has been reported stolen or is not type approved. The Authentication Center (AuC) is a protected database that stores a copy of the secret key stored in each subscriber’s SIM card, which is used for authentication and encryption over the radio channel. 2. 6. 2 Smart modem(GSM/GPRS) Analogic’s GSM Smart Modem is a multi-functional, ready to use, rugged and versatile modem that can be embedded or plugged into any application. The Smart Modem can be customized to various applications by using the standard AT commands. The modem is fully type-approved and can directly be integrated into your projects with any or all the features of Voice, Data, Fax, SMS, and Internet etc. Smart Modem kit contains the following items: 1. Analogic’s GSM/GPRS Smart Modem 2. SMPS based power supply adapter. 3. 3 dBi antenna with cable (optional: other types) 4. Data cable (RS232) 5. User Manual Temperature Range: Operating temperature: from -200C to +550C Storage temperature: from -250C to +700C Installing the modem: To install the modem, plug the device on to the supplied SMPS Adapter. For Automotive applications fix the modem permanently using the mounting slots (optional as per your requirement dimensions). Inserting/ Removing the SIM Card: To insert or Remove the SIM Card, it is necessary to press the SIM holder ejector button with Sharp edged object like a pen or a needle. With this, the SIM holder comes out a little, then pulls it out and insert or remove the SIM Card [pic] Fig 2. 6. 2 Inserting/Removing the sim card into the modem Make sure that the ejector is pushed out completely before accessing the SIM Card holder do not remove the SIM card holder by force or tamper it (it may permanently damage). Place the SIM Card Properly as per the direction of the installation. It is very important that the SIM is placed in the right direction for its proper working condition. Connecting External Antenna Connect GSM Smart Modem to the external antenna with cable end with SMA male. The Frequency of the antenna may be GSM 900/1800 MHz. The antenna may be (0 dbi, 3 dbi or short length L-type antenna) as per the field conditions and signal conditions. DC Supply Connection The Modem will automatically turn ON when connection is given to it. The following is the Power Supply Requirement: Connecting Modem to external devices: RS232 can be used to connect to the external device through the D-SUB/ USB (for USB model only) device that is provided in the modem. 2. 7 LCD (Liquid crystal display) Liquid crystal displays (LCDs) have materials, which combine the properties of both liquids and crystals. Rather than having a melting point, they have a temperature range within which the molecules are almost as mobile as they would be in a liquid, but are grouped together in an ordered form similar to a crystal. An LCD consists of two glass panels, with the liquid crystal material sand witched in between them. The inner surface of the glass plates are coated with transparent electrodes which define the character, symbols or patterns to be displayed polymeric layers are present in between the electrodes and the liquid crystal, which makes the liquid crystal molecules to maintain a defined orientation angle. When the LCD is in the off state, light rays are rotated by the two polarisers and the liquid crystal, such that the light rays come out of the LCD without any orientation, and hence the LCD appears transparent. When sufficient voltage is applied to the electrodes, the liquid crystal molecules would be aligned in a specific direction. The light rays passing through the LCD would be rotated by the polarisers, which would result in activating/ highlighting the desired characters. The LCD does don’t generate light and so light is needed to read the display. By using backlighting, reading is possible in the dark. The LCD’s have long life and a wide operating temperature range. 2. 7. 1 Pin description of LCD: [pic] VCC, VSS and VEE: While VCC and VSS provide +5V and ground respectively, VEE is used for controlling LCD contrast. The three control lines are referred to as EN, RS, and RW. EN: The EN line is called â€Å"Enable†. This control line is used to tell the LCD that you are sending it data. To send data to the LCD, your program should first set this line high (1) and then set the other two control lines and/or put data on the data bus. RS: The RS line is the â€Å"Register Select† line. When RS is low (0), the data is to be treated as a command or special instruction. When RS is high (1), the data that is sent is a text data which should be displayed on the screen. RW: The RW line is the â€Å"Read/Write† control line. When RW is low (0), the information on the data bus is being written to the LCD. When RW is high (1), the program is effectively querying (or reading) the LCD. Only one instruction (â€Å"Get LCD status†) is a read command. All others are write commands, so RW will almost be low. 2. 7. 2 LCD Interfacing Sending commands and data to LCDs with a time delay: [pic] Fig 2. 6. Interfacing of LCD to a micro controller To send any command from command list to the LCD, make pin RS=0. For data, make RS=1. Then sends a high –to-low pulse to the E pin to enable the internal latch of the LCD. 2. 8 Control System The controlling is done through the motors. Here relays acts as motors. A  relay  is an  electrically  operated  switch. Ma ny relays use an electromagnet to operate a switching mechanism, but other operating principles are also used. Relays find applications where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another. Since relays are  switches, the terminology applied to switches is also applied to relays. A relay will switch one or more  poles, each of whose contacts can be  thrown by energizing the coil in one of three ways: 1. Normally-open (NO) contacts connect the circuit when the relay is activated; the circuit is disconnected when the relay is inactive. It is also called a  Form A contact or â€Å"make† contact. 2. Normally-closed (NC) contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive. It is also called a  Form B contact or â€Å"break† contact. 3. Change-over (CO), or double-throw (DT), contacts control two circuits: one normally-open contact and one normally-closed contact with a common terminal. It is also called a  Form C  contact or â€Å"transfer† contact (â€Å"break before make†). If this type of contact utilizes â€Å"make before break† functionality, then it is called a  Form D  contact. The following designations are commonly encountered: SPST  Ã¢â‚¬â€œ Single Pole Single Throw. These have two terminals which can be connected or disconnected. Including two for the coil, such a relay has four terminals in total. It is ambiguous whether the pole is normally open or normally closed. The terminology â€Å"SPNO† and â€Å"SPNC† is sometimes used to resolve the ambiguity. SPDT  Ã¢â‚¬â€œ Single Pole Double Throw. A common terminal connects to either of two others. Including two for the coil, such a relay has five terminals in total. DPST  Ã¢â‚¬â€œ Double Pole Single Throw. These have two pairs of terminals. Equivalent to two SPST switches or relays actuated by a single coil. Including two for the coil, such a relay has six terminals in total. The poles may be Form A or Form B (or one of each). DPDT  Ã¢â‚¬â€œ Double Pole Double Throw. These have two rows of change-over terminals. Equivalent to two SPDT switches or relays actuated by a single coil. Such a relay has eight terminals, including the coil. Here in this project we are using single pole single throw. The relay has 3 pins, 1st pin is connected to the input, 2nd pin to the output and 3rd pin is connected to the ground. When input is given magnetic flux is generated and the motor starts rotating and the gate will be opened according to the development. A  motor receives power through two or more relays connected to a power source. A switch-operated logic circuit is powered by a relay power source and connects to the relays. To start the motor, the switch is pressed, causing the logic circuit to close the relays sequentially. When all the relays are closed, the motor will start. If the motor starts before the logic circuit closes all of the relays, the motor is stopped and an indication is provided that the relays that have not yet been closed have failed. Otherwise, the motor runs until the switch is pressed again, causing the logic circuit to open the relays and stop the motor. A power relay is a switch that uses an  electromagnet  to open or close a circuit. The basic design of a relay utilizes an electromagnet coil, an armature, a spring and one or more contacts. If the power relay is designed to normally be open, the circuit is not completed when in the off state. As power is applied to the power relay, generally from a battery source, the electromagnet attracts the armature, a movable arm often made of iron. The armature, which was held in place by the spring, is pulled in the direction of the coil until it reaches a contact, thus closing the circuit. If the relay is normally closed, then the coil pulls the armature away from the contact, opening the circuit. A power relay can be operated using a low amount of voltage but can also conduct a higher amount of voltage. In our project we are using a sub image able motor that is nothing but a motor. When a motor starts, the phase controller applies power to the windings so that they become magnetized with the polarity that attracts the permenant magnets on the rotor; this causes the rotor to begin rotating. As the permanent magnets on the rotor rotate past the electro-magnetic windings the phase controller reverses the polarity on the winding so that the winding repels the permanent magnets on the rotor. As the motor runs, the phase controller keeps switching windings on so that they are always attracting the permanent magnets on the rotor then repelling the permanent magnets on the rotor; this keeps it rotating. CHAPTER 3 SCHEMATIC DIAGRAM Fig 3 Schematic Diagram 3. 1 Circuit description This section gives an overview of the whole circuitry and hardware involved in the project. The required operating voltage for Microcontroller 89C51 is 5V. Hence the 5V D. C. power supply is needed by the same. This regulated 5V is generated by stepping down the voltage from 230V to 12V using step down transformer. Now the step downed a. c voltage is being rectified by the Bridge Rectifier using 1N4007 diodes. The rectified a. c voltage is now filtered using a ‘RC’ filter. Now the rectified, filtered D. C. voltage is fed to the Voltage Regulator. This voltage regulator provides/allows us to have a Regulated constant Voltage which is of +5V. The rectified; filtered and regulated voltage is again filtered for ripples using an electrolytic capacitor 100? F. Now the output from this section is fed to 40th pin of 89c51 microcontroller to supply operating voltage. The microcontroller 89C51 with Pull up resistors at Port0 and crystal oscillator of 11. 0592 MHz crystal in conjunction with couple of 30-33pf capacitors is placed at 18th 19th pins of 89c51 to make it work (execute) properly. Operating voltage for the GSM modem will depends on its type and an adaptor is provided with the GSM modem set itself. Here in this project various levels in dams are monitored and if they exceed the threshold values a SMS is sent through the concerned person. To perform all these activities first of all different levels should be monitor using liquid level indicators. These level indicators are placed in dam at different levels like level1, level2, level3 etc†¦ whenever if any level overflows automatically information is sent to the control section using GSM modem. The controlling part of the water level is also done by the controller through the instructions given by the developer. In this process the controller checks the number of threshold levels that are crossed and according to that the gates are being controlled. When modem receives the message controller will communicate with the modem through serial communication. As we can not directly give the data to the controller due to the voltage level difference between the GSM modem and the controller because GSM modem works on RS 232 logic levels whereas micro controller works on TTL logic levels and also we are using PC in this project which is also a RS 232 logic based. So to have compatibility we are using MAX 232. MAX232 converts from RS232 voltage levels to TTL voltage levels, and vice versa. One advantage of the MAX232 chip is that it uses a +5V power source which, is the same as the source voltage for the 8051. In the other words, with a single +5V power supply we can power both the 8051 and MAX232, with no need for the power supplies. The MAX232 has two sets of line drivers for transferring and receiving data. The line drivers used for TXD are called T1 and T2, while the line drivers for RXD are designated as R1 and R2. By using this to TX and RX pins we are going to communicate with the controller. CHAPTER 4 FLOW CHART TX Loop: [pic] RX Loop: [pic] CHAPTER 5 SCOPE AND FUTURE ENHANCEMENT It can be further enhanced by adding dtmf decoder to control the gate s of the dam and we send one msg to GSM amd that will be send the water level of the dam. If any unauthorized person tries to control the gate the GSM modem activate and that will pass this information to the authorized person. CHAPTER 6 CONCLUSION The project â€Å"DAM LEVEL WARNING USING GSM-SMS† has been successfully designed and tested. It has been developed by integrating features of all the hardware components used. Presence of every module has been reasoned out and placed carefully thus contributing to the best working of the unit. Secondly, using highly advanced IC’s and with the help of growing technology the project has been successfully implemented. Finally we conclude that â€Å"DAM LEVEL WARNING USING GSM-SMS† is an emerging field and there is a huge scope for research and development. CHAPTER 7 BIBILOGRAPHY 1. WWW. MITEL. DATABOOK. COM 2. WWW. ATMEL. DATABOOK. COM 3. WWW. FRANKLIN. COM 4. WWW. KEIL. COM 5. WWW. NATIONAL. COM 6. WWW. ATMEL. COM 7. WWW. MICROSOFTSEARCH. COM 8. WWW. GEOCITIES. COM 9. 8051-MICROCONTROLLER AND EMBEDDED SYSTEM. -Mohd. Mazidi 10. The 8051 Micro controller Architecture, Programming Applications -Kenneth J. Ayala 11. Fundamentals of Micro processors and Micro computers -B. Ram 12. Micro processor Architecture, Programming Applications -Ramesh S. Gaonkar 13. Wireless Communications -Theodore 14. S. Rappaport Mobile Tele Communications -William C. Y. Lee CHAPTER 8 APPENDIX Source code Software used: Keil software for c programming About keil software: It is possible to create the source files in a text editor such as Notepad, run the Compiler on each C source file, specifying a list of controls, run the Assembler on each Assembler source file, specifying nother list of controls, run either the Library Manager or Linker (again specifying a list of controls) and finally running the Object-HEX Converter to convert the Linker output file to an Intel Hex File. Once that has been completed the Hex File can be downloaded to the target hardware and debugged. Alternatively KEIL can be used to create source files; automatically compile, link and covert using options set with an easy to use user in terface and finally simulate or perform debugging on the hardware with access to C variables and memory. Unless you have to use the tolls on the command line, the choice is clear. KEIL Greatly simplifies the process of creating and testing an embedded application The user of KEIL centers on â€Å"projects†. A project is a list of all the source files required to build a single application, all the tool options which specify exactly how to build the application, and – if required – how the application should be simulated. A project contains enough information to take a set of source files and generate exactly the binary code required for the application. Because of the high degree of flexibility required from the tools, there are many options that can be set to configure the tools to operate in a specific manner. It would be tedious to have to set these options up every time the application is being built; therefore they are stored in a project file. Loading the project file into KEIL informs KEIL which source files are required, where they are, and how to configure the tools in the correct way. KEIL can then execute each tool with the correct options. It is also possible to create new projects in KEIL. Source files are added to the project and the tool options are set as required. The project is reloaded and the simulator or debugger started, all the desired windows are opened. KEIL project files have the extension Simulator/Debugger Coding include #include #include sbit M1 = P2^0; sbit M2 = P2^1; sbit M3 = P2^2; sbit L1 = P3^5; sbit L2 = P3^6; sbit L3 = P3^7; sbit Buz = P3^4; void TxMsg(unsigned char *msg,unsigned char *mno) { Send(â€Å"AT+CMGS=†); Send(mno); Delay_high(2); Send(msg); } void main() { bit L1_flag=0,L2_flag=0,L3_flag=0; LCD_Init(); Disp_Str(† Water Level â€Å" ); LCD_Cmd(0xC0); Disp_Str(â€Å"Warning System â€Å"); M1=M2=M3=0; Buz = 1; Delay (200); SConfig(); While (1) { If (L1==0 L2==1 L3==1 L1_flag==0) { L1_flag=1; L2_flag=0; L3_flag=0; Buz = 1; M1 = 1; M2 = 0; M3 = 0; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str (â€Å"** MEDIUM **†); TxMsg (â€Å"Water Level – MEDIUM†,†9951024603†³); TxMsg (â€Å"Water Level – MEDIUM†,†9848997946†³); TxMsg (â€Å"Water Level – MEDIUM†,†9966644775†³); TxMsg (â€Å"Water Level – MEDIUM†,†9299804677†³); TxMsg (â€Å"Water Level – MEDIUM†,†9849974776†³); Delay (200); } else If (L1==0 L2==0 L3==1 L2_flag==0) { L2_flag=1; L3_flag=0; L1_flag=0; Buz = 1; M1 = 1; M2 = 1; M3 = 0; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str (â€Å"** HIGH **†); TxMsg (â€Å"Water Level – HIGH†,†9951024603†³); TxMsg (â€Å"Water Level – HIGH†,†9848997946†); TxMsg (â€Å"Water Level – HIGH†,†9966644775†³); TxMsg (â€Å"Water Level – HIGH†,†9299804677†³); TxMsg (â€Å"Water Level – HIGH†,†9849974776†³); Delay (200); } else if (L1==0 L2==0 L3==0 L3_flag==0) // Level – 3 { L3_flag=1; L2_flag = 0; L1_flag=0; Buz = 0; M1 = 1; M2 = 1; M3 = 1; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str (â€Å"** VERY HIGH **†); TxMsg (â€Å"Water Level – VERY HIGH†,†951024603†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9848997946†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9966644775†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9299804677†³); TxMsg (â€Å"Water Level – VERY HIGH†,†9849974776†³); Delay (200); }else if(L1==1 L2==1 L3==1) Buz = 1; L1_flag=0; L2_flag=0; L3_flag=0; M1 = 0; M2 = 0; M3 = 0; LCD_Cmd (0x80); Disp_Str (â€Å"Water Level â€Å"); LCD_Cmd (0xC0); Disp_Str ( "** NORMAL**†); } } } KIT PHOTOS OF DAM LEVEL WARNING USING GSM SMS [pic] Kit photo of dam level warning using GSM SMS ———————– GSM MODEM MAX-232 POWER SUPPLY CONTROL SYSTEM LCD LIQUID LEVEL INDICATOR Level-3 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – — – – – – – – Level-2- – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – Level-1 – – – – â€⠀œ – – – – – — – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – — ———RESERVIOUR— MICRO CONTRO-LLER Tx Rx P0 P1 P2 P3 COUNTER INPUTS EXTERNAL INTERRUPTS CPU SERIAL PORT 4 I/O PORTS BUS CONTROL OSC TIMER 0 TIMER 1 ON CHIP RAM ON-CHIP RAM ON-CHIP FLASH INTERRUPT CONTROL RESET INTERRUPT L OCATIONS 8 bytes (0033)H 002BH 0023H 001BH 0013H 000BH 0003H 0000H How to cite Water Level Warning by Gsm, Essay examples

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