hye…. bro there is no need | Microcontroller › 8051 › To interface GSM SIM900 with 8051 › hye…. bro there is no need September 16, 2012 at 4:09 pm #8587 Omer FayyazParticipant hye…. bro there is no need to use max232 because both 8051 and SIM900 have TTL/Cmos level… best of luck
