Kem

I have modified my telnet - serial passthrough program a bit, so it works with the Arduino GSM Shield. This way you can test the AT commands of the shield.

SIM Ready:

AT+CPIN?

Signal strength: 

AT+CSQ

Send SMS:

AT+CMGF=1AT+CSCS="8859-1"AT+CMGS="<number>"<message><CTRL-Z>

Have fun!

Like NooM said on the Thread.Sleep(Timeout.Infinite);, but as far as I know you also have to read the data from the serial buffer, otherwise you will not receive new data.

You could also change the sleep of 1000 ms to a timer that will turn off the led after 1 second. This way you do not have to pause the thread.

O and it might be a good idea to change the parameters of your serialPort_DataReceived method

void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e) 

Hi,

I've had the same problem a while ago, turns out you need to add a reference to Microsoft.SPOT.Hardware.dll. The SerialDataReceivedEventHandler seems to live there .

Cheers,

Kem 

Hi,

I've just started to play with the same GSM shield (http://arduino.cc/en...rduinoGSMShield). So far I have been able to send and read SMS messages.

The newest version of the Quectel M10 AT Commands documentation I could find: http://www.sigmaelec...10_ATC_V1.2.pdf

Cheers,

Kem