[AVR] gsm and rfid reader interfacing with atmega16

[dhk]

Can both gsm and rfid reader be interfaced with atmega16 mcu as it has got only one USART? Are there any other methods to interface both with atmega16?

 

[milan.rajik]

If GSM is not used to receive SMS but only for sending SMS then Bi Lateral Switch can be used and both RFID and GSM can be connected to ATMega16's Single UART.

 

[dhk]

I am using GSM for both sending and receiving sms. So atmega16 cant be used to do this task?

 

[milan.rajik]

If RFID is communicating and at the same time SMS arrives then you will miss the automatic SMS arrival notification reading.

 

[dhk]

Thanks for the reply. Please can you suggest the method to interface both rfid and gsm together.
My project requires the mcu to first read data from RFID reader and then GSM modem will commumicate with server both to and fro.