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  • Using the Sim900/sim900A mini module with Arduino UNO

    Thanks for youre time sir! I can't find the SimT or SimR pins and i'm struggeling with finding the correct jumper/rx tx wiring. Can you look at the picture and explain me :) On my sim900A i have 3vr 3vt but if i place a jumper from 3vr - 5vr and 3vt - 5vt where do i get the rx and tx from the sim900? I cant see that on youre pictures.Appreciate you're time!

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  • Using the Sim900/sim900A mini module with Arduino UNO

    Hi!Can you please explain for me how you wire the Arduino to the Sim900A module.I've forgot the jumpers (next to the antenna) and measured negative 7V so if i connect the jumpers as shown on the picture i can use the same connection as shown on your picture?And do you know which pins the arduino GSM library use, I've tried to look into the .h and .ccp file to figure this out.I really appreciate if you answer me =)

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