Re: [gpsd-users] gpsd interfacing to SIM868 based Raspberry PI hat.

[shouldbe q931]

On Tue, May 14, 2019 at 3:52 PM Thomas Schweikle <address@hidden> wrote:

Hi!

Configuration:
- 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?

--

Thomas

From page 23 of this PDF https://simcom.ee/documents/SIM868E/SIM868_TE%20KIT_User%20Guide_V1.00.pdf

AT+CGNSPWR=1 (power on GNSS)

AT+CGNSTST=1 (Turn on NMEA output)

Have you tried turning on NMEA output ?

Cheers

Arne