Show State if Sim900 originated call is recieved

By default when you make a voice call Sim900 doesn’t send any response if the called party picks the call. Sometime its important to know if the other side is getting ring or has picked the call. In order to show the state we have to configure the module using the following AT Command


After sending the is command if a number is dialed, a URC string “MO RING” will be received if the other mobile is alerted and “MO CONNECTED” will be received if the call is answered.

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Dost Muhammad Shah

Dost Muhammad specializing in Embedded Design, Firmware development, PCB designing , testing and prototyping. He enjoys sharing his experience with others .Get in touch with Dost on Twitter or via Contact form


2 thoughts on “Show State if Sim900 originated call is recieved

    1. Well I had lost all my files as my host deleted everything after I couldn’t continue to renew my account. I will look for it and will try to post it again by saturday

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