Hello I am using a Arduino with an integrated GSM shield of open-electronics.org . The board is called GBoard of Iteadstudio ( http://imall.iteadstudio.com/special-product/im120411004.html ). I am using the new GSM library of open-electronics.org ( http://code.google.com/p/gsm-shield-arduino/ ). The boa…

SIM900 GSM shield: How to switch between software and hardware UART

magma October 26, 2012, 3:19pm 2

The library http://code.google.com/p/gsm-shield-arduino/ use the soft serial to comunicate with SIM900,
You should change the soft serial command to hardware serial command
More info

Old Shield

New shield

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SIM900 GSM shield: How to switch between software and hardware UART

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