EC25-G GPS issues

Technical Subjects
1

Hi,
I have the EC25-G with the sixfab base hat for raspberry pi / running debian. The LTE modem (cdc-wdm0) works great but I’m not sure how to get GPS working?

When I run the gpsd (gpsd -D 5 -N -n /dev/ttyUSB1) I get errors. Please check log below.

Any ideas how to fix this?

gpsd:INFO: launching (Version 3.22)
gpsd:IO: opening IPv4 socket
gpsd:IO: opening IPv6 socket
gpsd:INFO: listening on port gpsd
gpsd:PROG: NTP: shmat(55,0,0) succeeded, segment 0
gpsd:PROG: NTP: shmat(56,0,0) succeeded, segment 1
gpsd:PROG: NTP: shmat(57,0,0) succeeded, segment 2
gpsd:PROG: NTP: shmat(58,0,0) succeeded, segment 3
gpsd:PROG: NTP: shmat(59,0,0) succeeded, segment 4
gpsd:PROG: NTP: shmat(60,0,0) succeeded, segment 5
gpsd:PROG: NTP: shmat(61,0,0) succeeded, segment 6
gpsd:PROG: NTP: shmat(62,0,0) succeeded, segment 7
gpsd:PROG: successfully connected to the DBUS system bus
gpsd:PROG: shmget(0x47505344, 24512, 0666) for SHM export succeeded
gpsd:PROG: shmat() for SHM export succeeded, segment 63
gpsd:INFO: stashing device /dev/ttyUSB1 at slot 0
gpsd:PROG: no /etc/gpsd/device-hook present, skipped running ACTIVATE hook
gpsd:INFO: SER: opening GPS data source type 3 at ‘/dev/ttyUSB1’
gpsd:INFO: SER: speed 9600, 8N1
gpsd:PROG: Probing “Garmin USB binary” driver…
gpsd:INFO: attempting USB device enumeration.
gpsd:INFO: 1d6b:0003 (bus 2, device 1)
gpsd:INFO: 258a:0131 (bus 1, device 5)
gpsd:INFO: 2c7c:0125 (bus 1, device 4)
gpsd:INFO: 0bda:8812 (bus 1, device 3)
gpsd:INFO: 2109:3431 (bus 1, device 2)
gpsd:INFO: 1d6b:0002 (bus 1, device 1)
gpsd:INFO: vendor/product match with 091e:0003 not found
gpsd:PROG: Probe not found “Garmin USB binary” driver…
gpsd:PROG: Probing “GeoStar” driver…
gpsd:PROG: Sent GeoStar packet id 0xc1
gpsd:IO: SER: => GPS: 5053474700c100010000000050924746
gpsd:PROG: Probe not found “GeoStar” driver…
gpsd:PROG: Probing “Trimble TSIP” driver…
gpsd:INFO: SER: speed 9600, 8O1
gpsd:INFO: SER: speed 9600, 8N1
gpsd:PROG: Probe not found “Trimble TSIP” driver…
gpsd:PROG: Probing “iSync” driver…
gpsd:INFO: SER: speed 9600, 8N1
gpsd:IO: SER: => GPS: @@@@\x0d\x0aMAW0C0B\x0d\x0a
gpsd:INFO: SER: speed 9600, 8N1
gpsd:PROG: Probe not found “iSync” driver…
gpsd:PROG: no probe matched…
gpsd:INFO: gpsd_activate(2): activated GPS (fd 6)
gpsd:PROG: NTP:PPS: using SHM(0)
gpsd:PROG: NTP:PPS: using SHM(1)
gpsd:PROG: PPS:/dev/ttyUSB1 chrony socket /run/chrony.ttyUSB1.sock doesn’t exist
gpsd:PROG: KPPS:/dev/ttyUSB1 checking /sys/devices/virtual/pps/pps0/path, /dev/ttyUSB1
gpsd:INFO: KPPS:/dev/ttyUSB1 RFC2783 path:/dev/pps0, fd is 7
gpsd:INFO: KPPS:/dev/ttyUSB1 pps_caps 0x1133
gpsd:INFO: KPPS:/dev/ttyUSB1 have PPS_CANWAIT
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS will be used
gpsd:PROG: PPS:/dev/ttyUSB1 thread launched
gpsd:INFO: PPS: activated /dev/ttyUSB1 ntpshm_link_activate(): Clock
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: running with effective group ID 20
gpsd:INFO: running with effective user ID 133
gpsd:INFO: startup at 2023-03-27T09:54:22.000Z (1679910862)
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:WARN: PPS:/dev/ttyUSB1 unchanged state, ppsmonitor sleeps 10
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:INFO: KPPS:/dev/ttyUSB1 kernel PPS timeout unknown error
gpsd:WARN: PPS:/dev/ttyUSB1 unchanged state, ppsmonitor sleeps 10

2

Hi @dgr
Please ensure that the GPS antenna is properly connected and used outdoors when the star search is available.

3

Is the GPS itself activated? It seems to me like there is no data coming on /dev/ttyUSB1.

If you use ModemManager you can try the following commands:

# Check location status/sources
mmcli -m 0 --location-status
# Enable GPS NMEA message output
mmcli -m 0 --location-enable-gps-nmea

If you use the modem directly try the following AT commands instead:

# Check status
AT+QGPS?
# Enable GPS
AT+QGPS=1