Gsm Modem Interfacing with Microcontroller 8051 for Sms

Topics: Mobile phone, Short Message Service, Text messaging Pages: 4 (1017 words) Published: February 6, 2012
GSM modem interfacing with microcontroller 8051 for SMS control of industrial equipments GSM modem interfacing with microcontroller 8051 for SMS control of industrial equipments:- This is a beginner tutorial in which a GSM modem is being interfaced with the microcontroller AT89s51 for SMS communication. The SMS can be send and recieved for the data sharing and situation information and control. there are many application of the project based on microcontroller 8051 and GSM interfacing. We can use it as a remote control of industrial machines or we can sue it for home automation or we can use it for the security of home or offices.gsm control 8051 The sending SMS through GSM modem when interfaced with microcontroller or PC is much simpler as compared with sending SMS through Modem in PDU Mode.Text message may be sent through the modem by interfacing only three signals of the serial interface of modem with microcontroller i.e.,TxD,RxD and GND.In this scheme RTS and CTS signals of serial port interface of GSM Modem are connected with each other.The transmit signal of serial port of microcontroller is connected with transmit signal (TxD) of the serial interface of GSM Modem while receive signal of microcontroller serial port is connected with receive signal (RxD) of serial interface of GSM Modem.The COMPIM Serial Port Model shown in the schematic diagram developed in Proteus VSM is equivalent to the serial interafce of GSM Modem.Sending SMS Messages from a Computer / PC Using AT Commands (AT+CMGS, AT+CMSS) 8051 projects based on message recived on mobile

The following are the AT Commands and sequence of events performed for sending text message to a mobile phone through GSM Modem interfaced with microcontroller :

1. First select the text mode for SMS by sending the following AT Command to GSM Modem : AT+CMGF = 1 . This command configures the GSM modem in text mode.

2. Send the following AT Command for sending SMS message in text mode along withmobile...
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