Introduction - If you have any usage issues, please Google them yourself
C51 microcontroller and GSM module communication procedures (temperature acquisition and SMS control)
MCU and control TC35I
1) microcontroller detects temperature display temperature (keep a decimal), the temperature value edited into short messages to mobile phones
2) mobile phones to send text messages to the microcontroller, microcontroller relay control: such as sending open1, relays an open,
Send close1, relay 1 off, sending open2, relay 2 opens, sends close2, Relay 2 closes.