USART sim900 and Atmega32

[faisal349]

I want to interface sim900 with atmega via UART.

I need only Tx,Rx and Gnd pin for interfacing it with atmega32....right??

and secondly how can I interface sim900 with PC....Do i need DTR,RTS etc pins also along with tx,rx,gnd??

Also I want to keep my GSM modem 'on' all the time....so when the power is lost and restored again I don't want to turn the modem 'turn on' manually but rather it should turn on automatically.....How should i connect the PWRKEY Pin so it turns on automatically when power is back.

Thanks

 

[sabeti_1990]

I want to interface sim900 with atmega via UART.

I need only Tx,Rx and Gnd pin for interfacing it with atmega32....right??

and secondly how can I interface sim900 with PC....Do i need DTR,RTS etc pins also along with tx,rx,gnd??

Also I want to keep my GSM modem 'on' all the time....so when the power is lost and restored again I don't want to turn the modem 'turn on' manually but rather it should turn on automatically.....How should i connect the PWRKEY Pin so it turns on automatically when power is back.

Thanks

hi
for connect to PC rx & tx & gnd is enough
u should only use a level converter like max232

but for tern on module automatically u only can use a program in your mega32 to read work state of sim900

- - - Updated - - -

I want to interface sim900 with atmega via UART.

I need only Tx,Rx and Gnd pin for interfacing it with atmega32....right??

and secondly how can I interface sim900 with PC....Do i need DTR,RTS etc pins also along with tx,rx,gnd??

Also I want to keep my GSM modem 'on' all the time....so when the power is lost and restored again I don't want to turn the modem 'turn on' manually but rather it should turn on automatically.....How should i connect the PWRKEY Pin so it turns on automatically when power is back.

Thanks

hi
for connect to PC rx & tx & gnd is enough
u should only use a level converter like max232

but for tern on module automatically u only can use a program in your mega32 to read work state of sim900