Microcontroller › 8051 › interface gsm modem to 8051 by bjreddy › Hi thereI don’t think it is
October 24, 2016 at 1:40 pm #14212
I don't think it is necessary to involve max232 IC for this task. Both 8051 and GSM module are capable of communicating over USART protocol. Just make the right connections and it will work for sure. Also you should be aware of GSM AT commands while working with it.