- Raspberry PI HAT based on SIM868 set to communicate with GPIO serial port
- Raspberry PI 2B+ GPIO set to serial, no console 8N1 at 115200baud
Hardware works. Can switch "on" this board. After sending
echo "ATE0" > /dev/ttyAMD0
echo "AT+CGNSPWR=1" > /dev/ttyAMA0
PPS LED turns blinking 1s pulses after about 28s. GPIO pin 18 is pulled every second.
# cat < /dev/ttyAMA0
does not give back anything.
Starting gpsd with
# gpsd -N /dev/ttyAMA0
starts gpsd running as user gpsd. But it does not lead to nothing. gpsd is just started nothing else happens. Seems to wait on data on /dev/ttyAMA0.
Any idea how to initialize the SIM868 based board to make it work with gpsd?