Difficulty reading SMS with GPRS shield

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#1

I’m clearly doing something wrong but I had assumed that I would be able to use the GSM and SIM900 libraries with the Seeed GPRS shield (after modifying gsm.h to reflect pin 7 and 8)
however when I startup a basic sketch it says it cannot communicate with the sim900 and to check the pin configuration

If I run the example code from the wiki I can make a call or send an sms without any issues at all however I want to be able to read an incoming sms

does anyone have any sketches that they are willing to share for reading a sms with this shield?

subsequently I am also having difficulty using my Leonardo as a serial pass through which may also indicate what is wrong however I have no idea what is going wrong as I said I am able to use the example on the wiki to communicate using software serial without any issues.

#2

I think i have determined what is going wrong, it seems that only pin 7 is connecting and pin 8 is not, so I can send commands to the sim900 but I never get the responses back, which is fine when I am sending a SMS because it only requires the ability to send the commands but doesnt require the responses, however why it is behaving like this I do not know, both jumpers are set to softwareserial mode.

#3

Hi,if you use SSCOM32E to test your GPRS,you can sent and receive SMS.And you can refer to this web site to get more interesting information.
viewtopic.php?f=10&t=3956

And if you use Leonardo,you may modify your program.