hello all. i got problem for connecting my arduino uno to my gsm shield..i want to ask what is the standard connection must connect to uno since this shield has a lot of pin XD...my project just want to send sms when the button being push...

gms shield arduino sim900

Projects Networking, Protocols, and Devices

system March 22, 2012, 7:49pm 3

because in the datasheet there are lot of interface like gpio,uart,iic &pwm,debug_port..i just cant understand it...do i need to connect all this pin..

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gms shield arduino sim900

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