HiThis might help :(https:/ | Microcontroller › AVR › How To interface GSM modem with ATMEGA16 › HiThis might help :(https:/ February 15, 2018 at 7:01 am #14737 GANEEV SINGHParticipant Hi This might help : (https://www.engineersgarage.com/contribution/how-to-interface-GSM-SIM-300-modem-with-atmega32-to-send-and-receive-SMS)