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The R1IN pin of the IC is connected to the receiver pin of the GSM modem.
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The T1out pin of the IC is connected to the transmitter pin of the GSM modem. The receiver pin R1out of the max232 is connected to the receiver pin of the microcontroller. The transmitter pin T1IN of max232 is connected to the transmitter pin of the microcontroller. Interfacing of GSM to AT89C51 microcontroller uses only one transmitter and receiver. This is a dual driver IC as it has two transmitters and receivers. RS232 logic levels of GSM are converted to the TTL logic levels of the microcontroller using this MAX232 IC. MAX232 IC is used for converting the logic levels. In between the GSM module and the microcontroller MAX232 IC is connected. GSM has RS232 interface for serial communication. The circuit of interfacing GSM to AT89C51 microcontroller mainly consists of GSM modem and 8051 family microcontroller. GSM Modem Interfacing with 8051 Microcontroller Circuit Diagram: Circuit Diagram of GSM Interfacing with 8051 MicrocontrollerĬircuit Design of Interfacing of GSM Modem to AT89C51 Microcontroller: The following AT commands are frequently used to control the operations of GSM modem. Microcontroller sends these commands to the GSM modem, which is then activated to perform the required operation. To communicate with GSM modem, AT commands are required. The microcontroller used is AT89C51 microcontroller. The main principle of this circuit is to interface a GSM modem with the microcontroller. GSM Interfacing with 8051 Microcontroller Circuit Principle: GSM Modem Interfacing with 8051 Circuit Applications:.GSM Interfacing 8051 Microcontroller Project Output Video:.
VIRTUAL TERMINAL IN PROTEUS FOR GSM HOW TO
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GSM Interfacing with 8051 Microcontroller Circuit Simulation Video:.Circuit Design of Interfacing of GSM Modem to AT89C51 Microcontroller:.GSM Modem Interfacing with 8051 Microcontroller Circuit Diagram:.GSM Interfacing with 8051 Microcontroller Circuit Principle:.