sim900 not working with arduino UNO

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shadybrady55
Posts: 1
Joined: Mon Jan 18, 2016 4:12 am

sim900 not working with arduino UNO

Post by shadybrady55 »

Hello!


I am having problems connecting my sim900 shield to the Arduino UNO.

Here is the SIM card I am using from this phone. http://www.alcatelonetouch.us/alcatel-o ... 05g-zodiac IT is a "tracphone" I am in the USA and it is an unlocked GSM sim card.

Problem: when I attach the sim900 to the uno, I am receiving a blinking green "netlight" and a red status light.

I have tried attaching them separately and together. I have tried several different code, and it never connects. The light blinks the same, maybe 800s on and 64 ms off but it is hard to tell.

http://postimg.org/image/nsjrwn1mv/
http://postimg.org/image/x97qxpcqp/

Please help! I have tried different code using 9600 baud and 19200 baud. But even before running any code, I should be able to see the gsm hook up to a network.
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