GPRS shield with Mega R3

Products & Technology Shields
#1

I am trying to use the seeedstudio GPRS 1.4 with a Mega R3.

I am using the demo sketch in the wiki. The board turns on ok and the red and green LEDs light and blink as they should. I have the jumpers set for software communication. I set the terminal for 19,200 8 N 1. I did set it to add CR. I can not get the terminal to take the AT commands. I am plugging the shield into the Mega. Is there some issue of the Mega vs UNO? Do you have some instructions or sample code to make it work? Thanks.

Robert

#2

Hello,

The GPRS demo code is using Arduino SoftwareSerial library, it is different between Arduino Uno and Arduino Mega, the digital port 8 could not be used for software serial RX. Hence , if you want to use software serial, you should connect TX of GPRS Shield to other port like D10 , then change the demo code

SoftwareSerial GPRS(7, 8);
[/code] to[code]
SoftwareSerial GPRS(10, 8);

For more detail of SoftwareSerial library , you should refer to the below link.
http://arduino.cc/en/Reference/SoftwareSerial

Deray