yes u can use TTL based GSM | Microcontroller › AVR › Can i use TTL based GSM sim 300 module for Atmega 8l (i need only to send msgs) › yes u can use TTL based GSM March 31, 2013 at 4:11 am #9398 sushantParticipant yes u can use TTL based GSM modem, conncnnct microcontroller pin rx to GSM tx and microcontroller pin TX to GSM rx. and write the code for atmega8 and write the message in the code and you can eaisly send the message to any mobile no.
