Hey, I have purchased an arduino uno rev 3 http://arduino.cc/en/Main/arduinoBoardUno and a icomsat v1.0 sim900 http://iteadstudio.com/store/images/produce/Shield/IComSat/icomsat_DS1.2.pdf i am trying to send an sms using this. the code that i am using is #include "SIM900.h" #include <SoftwareSeri…

Arduino Uno + sim900

system May 2, 2012, 4:33am 5

It is working now. I did not connect a extra power supply, just connect Uno with usb to labtop.
TX is 4 and RX is 5. I guess that the right pin.

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