Hi Krishna, ATmega16 has only | Microcontroller › AVR › URGENT!! Interfacing GPS and GSM with ATMega16 › Hi Krishna, ATmega16 has only March 1, 2014 at 5:17 pm #11149 Ganesh SelvarajParticipant Hi Krishna, ATmega16 has only one hardware USART (1 RX and 1 TX pin) so if you want to control these both devices then you have to choose a microcontroller with two USARTs (like ATmega164) or you have to use software UART.
