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Topic: sim900 gsm/gprs module (Read 1 time) previous topic - next topic



I have a problem with sim900. I buy in this shop online https://www.dfrobot.com/product-969.html

I try to connect to arduino Uno board. but the module not response.

I have a question.

1. I use J2 (5V, GND, TX, RX, and PowerUp pin) connect to Arduino Uno board. (5V, 0,1,9 Pin). I cant find why the a module not work.
2. What library can I used.


Thanks for helps

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