Is there any where that I can get documentation for the Raspberry Pi GSM Add-on V2.0? I'm trying to follow the instructions that I've found on the internet, but they don't seem to work for me.
Even a very simple step by step would really help me. Thanks
# systemctl stop serial-getty@ttyAMA0.service
# systemctl disable serial-getty@ttyAMA0.service
2. Power on the device:
it took me one hour to find out that there is a power button and I should press it for 3 seconds to power on the device!
3. Power on the device from bash (yeap, no need to press the power button!)
# echo 17 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio17/direction
# echo 1 > /sys/class/gpio/gpio17/value
4. use minicom to connect to /dev/ttyAMA0 and send simple at commands like at, ati4, etc
5. check raspberry temperature:
# vcgencmd measure_temp