GPRS & Arduino UNO Connection issues

I am working on trying to send an SMS using the GPRS Shield and Arduino UNO board. I have been following the wiki page for the GPRS Shield, and on the webpage under section 7.1.1 is where I encounter my error. ( … PRS_Shield)

I have my GPRS attached to my UNO, and when I try and upload my sketch (using Arduino sketch tool), I recieve the following error(s):
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

However, when I try to upload the sketch without the GPRS Shield attached, the upload works, but I don’t get a response from my Serial Terminal.

Any help would be appreciated, thank you.

Remove GPRS module during firmware upload. They are sharing the same UART.

You need another arduino to monitor the UART communication output… no other way around.

Thank you, but I am confused. The instructions acknowledge the issue you brought up, but seem to lead me to believe that there was a work around, and not 2 arduino boards.

So is this what I need to do:

  1. Upload the sketch to the board
  2. Attach GPRS Shield
  3. Reset the Arduino Uno board
  4. Type AT in the serial command

This should work?

Okay, so when I posted, I didn’t have a SIM card in place due to misreading the wiki. Regardless, I have a SIM card in place, but still no dice. The status light on the GPRS Shield is now RED, what does this mean?