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Author Topic: Arduino UNO | ICOMSAT v1.1 SIM900 GSM Module  (Read 1623 times)
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Hi,

I am trying to use UNO with ICOMSAT v1.1 SIM900 GSM Module .  I am currently trying with this https://github.com/jgarland79/GSM_Shield library . I have set the rx,tx pin as 2,3 and have also connected uno to external supply but i am not getting any response from the GSM module . I send a simple AT command but get no response.I think UNO is not able to communicate with the GSM . What change should i do ? Another Library?

Regards,
Anandghan
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Hi,
did you try to set the tx rx pin of 7 and 8

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did you turn it on? can you upload the sketch? remove the shield before uploading
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Make sure you have at least 7V / 2A on the Arduino + Shield. The module is power hungry. There's another library, by openelectronics (or something like that) which works well with this shield. Just google it.
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