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Unable to use RPI SIM900 ADD-ON V1.0 with Raspberry Pi 3


A couple of days ago I've bought a RPI SIM900 GSM/GPRS ADD-ON V1.0 and I'm struggling to make it work since then.

I have disabled the service that used the /dev/ttyAMA0 serial port as suggested.

Still when I try to use minicom to send some AT commands to the addon, it just hangs.

Here is the command I use: minicom -b 9600 -o -D /dev/ttyAMA0

I've also tried to use the C library you provided, but it also does not seem to work.

Any help would be appreciated.


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