sim900 shield not working

Official Hardware Retired GSM Shield
1

Hi all

I'm using this shield: http://linksprite.com/wiki/index.php5?title=SIM900_GPRS/GSM_Shield

on my Arduino Uno.

I'm using the hardware serial ports (0 and 1) as the tx/rx. I've changed the jumpers on the shield to reflect this.

I can power the shield on and it connects to the gsm network but serial port say:

'GSM Shield testing.
DB:NO RESP'

I'm using this library: http://www.gsmlib.org/

I've modified GSM.cpp to change it to:

'#define GSM_TXPIN 0
#define GSM_RXPIN 1'

Any thoughts why this isn't working?

Thanks

2

Quite a few reasons. Take a look at the link in my signature, it's a similar device.