13-08-2014, 03:50 PM
GSM BASED DISPLAY TOOLKIT
[attachment=66624]
ABSTRACT
Wireless communication has announced its arrival on big stage and the world is going mobile. We want to control everything and without moving an inch. This remote control of appliances is possible through Embedded Systems. The use of “Embedded System in Communication” has given rise to many interesting applications that ensures comfort and safety to human life.
The main aim of the project will be to design a SMS driven automatic display
toolkit which can replace the currently used programmable electronic display. It is
proposed to design receive cum display toolkit which can be programmed from an
authorized mobile phone. The message to be displayed is sent through a SMS from an
authorized transmitter. The toolkit receives the SMS, validates the sending Mobile
Identification Number (MIN) and displays the desired information after necessary code
conversion. The system is made efficient by using ‘clone’ SIMs of same MIN in a
geographical area so that the same SMS can be received by number of display boards in a
locality using techniques of time division multiple access. Started of as an instantaneous
News display unit, we have improved upon it and tried to take advantage of the
computing capabilities of microcontroller. We envision a toolkit that will not only
display message but also can be used to do some mechanical work.
Looking into current trend of information transfer in the campus, it is seen that important notice take time to be displayed in the notice boards. This latency is not expected in most of the cases and must be avoided.
It is proposed to implement this project at the institute level. It is roposed to place display boards in major access points. The electronics displays which are currently used are programmable displays which need to be reprogrammed each time.Thismakes it inefficient for immediate information transfer, and thus the display board looses its
importance. The GSM based display toolkit can be used as a add-on to these display
boards and make it truly wireless. The display board programs itself with the help of the
incoming SMS with proper validation. Such a system proves to be helpful for immediate
information transfer
INTRODUCTION
Presently, the United States is the most technologically advanced country in the area of
telecommunications with about; 126 million phone lines, 7.5 million cellular phone users,
5 thousand AM radio broadcast stations, 5 thousand FM radio stations, 1 thousand television broadcast stations, 9 thousand cable television systems, 530 million radios, 193 million television sets, 24 ocean cables, and scores of satellite facilities!
This is truly an "Information Age" and sometimes, you need to look at where we've been in order to see the future more clearly!
Information Transfer
A coordinated sequence of user and telecommunications system actions that cause information present at a source user to become present at a destination user. Note: An information-transfer transaction usually consists of three consecutive phases called the access phase, the information-transfer phase, and the disengagement phase.
Broadcast
A term to describe communication where a piece of information is sent or transmitted
from one point to all other points. There is just one sender, but the information is simultaneously sent to all connected receivers. In networking, a distinction is made between broadcasting and multicasting. Broadcasting sends a message to everyone on the network whereas multicasting sends a message to a select list of recipients.
One of the most common examples is broadcast through a cellular network
service. This serves multiple end users at different locations in a simulcast fashion.
Practically every cellular system has some kind of broadcast mechanism. This can be
used directly for distributing information to multiple mobiles, commonly, for example in
a mobile telephony system, the most important use of broadcast information is to set up
channels for one to one communication between the mobile Trans-receiver and the base
station. This is called paging. The details of the process of paging vary somewhat from
network to network, but normally we know a limited number of cells where the phone is
located (this group of cells is called a location area in the GSM system or Routing Area
in UMTS). Paging takes place by sending the broadcast message on all of those cells.
1
RTS/CTS Handshaking
The standard RS-232 use of the RTS and CTS lines is asymmetrical. The DTE asserts
RTS to indicate a desire to transmit and the DCE asserts CTS in response to grant
permission. This allows for half-duplex modems that disable their transmitters when not
required, and must transmit a synchronization preamble to the receiver when they are re-
enabled. There is no way for the DTE to indicate that it is unable to accept data from the
DCE. A non-standard symmetrical alternative is widely used: CTS indicates permission
from the DCE for the DTE to transmit, and RTS indicates permission from the DTE for
the DCE to transmit. The "request to transmit" is implicit and continuous. The standard
defines RTS/CTS as the signaling protocol for flow control for data transmitted from
DTE to DCE. The standard has no provision for flow control in the other direction. In
practice, most hardware seems to have repurposed the RTS signal for this function. A
minimal “3-wire” RS-232 connection consisting only of transmits data, receives data and
ground, and is commonly used when the full facilities of RS-232 are not required. When
only flow control is required, the RTS and CTS lines are added in a 5-wire version. In our
The standard RS-232 use of the RTS and CTS lines is asymmetrical. The DTEasserts RTS to indicate a desire to transmit and the DCE asserts CTS in response togrant permission. This allows for half-duplex modems that disable their transmitters when not equired, and must transmit a synchronization preamble to the receiver when they are re-
enabled. There is no way for the DTE to indicate that it is unable to accept data from the
DCE. A non-standard symmetrical alternative is widely used: CTS indicates permission
from the DCE for the DTE to transmit, and RTS indicates permission from the DTE for
the DCE to transmit. The "request to transmit" is implicit and continuous. The standard
defines RTS/CTS as the signaling protocol for flow control for data transmitted from
DTE to DCE. The standard has no provision for flow control in the other direction. In
practice, most hardware seems to have repurposed the RTS signal for this function. A
minimal “3-wire” RS-232 connection consisting only of transmits data, receives data and
ground, and is commonly used when the full facilities of RS-232 are not required. When
only flow control is required, the RTS and CTS lines are added in a 5-wire version.
8 CONCLUSION
The prototype of the GSM based display toolkit was efficiently designed. This prototype has facilities to be integrated with a display board thus making it truly mobile. The toolkit accepts the SMS, stores it, validates it and then displays it in the LCD module. The SMS is deleted from the SIM each time it is read, thus making room for the next SMS. The major constraints incorporated are the use of ‘*’ as the termination character of the SMS and the display of one SMS as a time. These limitations can be removed by the use of higher end microcontrollers and extended RAM.
The prototype can be implemented using commercial display boards. In this case, it can solve the problem of instant information transfer in the campus.
[attachment=66624]
ABSTRACT
Wireless communication has announced its arrival on big stage and the world is going mobile. We want to control everything and without moving an inch. This remote control of appliances is possible through Embedded Systems. The use of “Embedded System in Communication” has given rise to many interesting applications that ensures comfort and safety to human life.
The main aim of the project will be to design a SMS driven automatic display
toolkit which can replace the currently used programmable electronic display. It is
proposed to design receive cum display toolkit which can be programmed from an
authorized mobile phone. The message to be displayed is sent through a SMS from an
authorized transmitter. The toolkit receives the SMS, validates the sending Mobile
Identification Number (MIN) and displays the desired information after necessary code
conversion. The system is made efficient by using ‘clone’ SIMs of same MIN in a
geographical area so that the same SMS can be received by number of display boards in a
locality using techniques of time division multiple access. Started of as an instantaneous
News display unit, we have improved upon it and tried to take advantage of the
computing capabilities of microcontroller. We envision a toolkit that will not only
display message but also can be used to do some mechanical work.
Looking into current trend of information transfer in the campus, it is seen that important notice take time to be displayed in the notice boards. This latency is not expected in most of the cases and must be avoided.
It is proposed to implement this project at the institute level. It is roposed to place display boards in major access points. The electronics displays which are currently used are programmable displays which need to be reprogrammed each time.Thismakes it inefficient for immediate information transfer, and thus the display board looses its
importance. The GSM based display toolkit can be used as a add-on to these display
boards and make it truly wireless. The display board programs itself with the help of the
incoming SMS with proper validation. Such a system proves to be helpful for immediate
information transfer
INTRODUCTION
Presently, the United States is the most technologically advanced country in the area of
telecommunications with about; 126 million phone lines, 7.5 million cellular phone users,
5 thousand AM radio broadcast stations, 5 thousand FM radio stations, 1 thousand television broadcast stations, 9 thousand cable television systems, 530 million radios, 193 million television sets, 24 ocean cables, and scores of satellite facilities!
This is truly an "Information Age" and sometimes, you need to look at where we've been in order to see the future more clearly!
Information Transfer
A coordinated sequence of user and telecommunications system actions that cause information present at a source user to become present at a destination user. Note: An information-transfer transaction usually consists of three consecutive phases called the access phase, the information-transfer phase, and the disengagement phase.
Broadcast
A term to describe communication where a piece of information is sent or transmitted
from one point to all other points. There is just one sender, but the information is simultaneously sent to all connected receivers. In networking, a distinction is made between broadcasting and multicasting. Broadcasting sends a message to everyone on the network whereas multicasting sends a message to a select list of recipients.
One of the most common examples is broadcast through a cellular network
service. This serves multiple end users at different locations in a simulcast fashion.
Practically every cellular system has some kind of broadcast mechanism. This can be
used directly for distributing information to multiple mobiles, commonly, for example in
a mobile telephony system, the most important use of broadcast information is to set up
channels for one to one communication between the mobile Trans-receiver and the base
station. This is called paging. The details of the process of paging vary somewhat from
network to network, but normally we know a limited number of cells where the phone is
located (this group of cells is called a location area in the GSM system or Routing Area
in UMTS). Paging takes place by sending the broadcast message on all of those cells.
1
RTS/CTS Handshaking
The standard RS-232 use of the RTS and CTS lines is asymmetrical. The DTE asserts
RTS to indicate a desire to transmit and the DCE asserts CTS in response to grant
permission. This allows for half-duplex modems that disable their transmitters when not
required, and must transmit a synchronization preamble to the receiver when they are re-
enabled. There is no way for the DTE to indicate that it is unable to accept data from the
DCE. A non-standard symmetrical alternative is widely used: CTS indicates permission
from the DCE for the DTE to transmit, and RTS indicates permission from the DTE for
the DCE to transmit. The "request to transmit" is implicit and continuous. The standard
defines RTS/CTS as the signaling protocol for flow control for data transmitted from
DTE to DCE. The standard has no provision for flow control in the other direction. In
practice, most hardware seems to have repurposed the RTS signal for this function. A
minimal “3-wire” RS-232 connection consisting only of transmits data, receives data and
ground, and is commonly used when the full facilities of RS-232 are not required. When
only flow control is required, the RTS and CTS lines are added in a 5-wire version. In our
The standard RS-232 use of the RTS and CTS lines is asymmetrical. The DTEasserts RTS to indicate a desire to transmit and the DCE asserts CTS in response togrant permission. This allows for half-duplex modems that disable their transmitters when not equired, and must transmit a synchronization preamble to the receiver when they are re-
enabled. There is no way for the DTE to indicate that it is unable to accept data from the
DCE. A non-standard symmetrical alternative is widely used: CTS indicates permission
from the DCE for the DTE to transmit, and RTS indicates permission from the DTE for
the DCE to transmit. The "request to transmit" is implicit and continuous. The standard
defines RTS/CTS as the signaling protocol for flow control for data transmitted from
DTE to DCE. The standard has no provision for flow control in the other direction. In
practice, most hardware seems to have repurposed the RTS signal for this function. A
minimal “3-wire” RS-232 connection consisting only of transmits data, receives data and
ground, and is commonly used when the full facilities of RS-232 are not required. When
only flow control is required, the RTS and CTS lines are added in a 5-wire version.
8 CONCLUSION
The prototype of the GSM based display toolkit was efficiently designed. This prototype has facilities to be integrated with a display board thus making it truly mobile. The toolkit accepts the SMS, stores it, validates it and then displays it in the LCD module. The SMS is deleted from the SIM each time it is read, thus making room for the next SMS. The major constraints incorporated are the use of ‘*’ as the termination character of the SMS and the display of one SMS as a time. These limitations can be removed by the use of higher end microcontrollers and extended RAM.
The prototype can be implemented using commercial display boards. In this case, it can solve the problem of instant information transfer in the campus.