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chirpstack / chirpstack-gateway-os

OpenWrt based gateway images including ChirpStack components.
https://www.chirpstack.io
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GPS on Pi Zero W #37

Closed mrbubble62 closed 4 years ago

mrbubble62 commented 4 years ago

I updated chirpstack-concentratord config with

[gateway]
gps_tty_path="/dev/ttyS0"

However still tries to use ttyAMA0

Feb 11 23:12:00 gw1 user.info chirpstack-concentratord-sx1301[522]: Starting GPS validation loop
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: Starting stats loop, stats_interval: 30s
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: Starting GPS loop
Feb 11 23:12:00 gw1 user.info chirpstack-concentratord-sx1301[522]: GPS TTY port opened for GPS synchronization, gps_tty_path: /dev/ttyAMA0
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: Current concentrator count_us: 2576389
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: Concentrator drift, drift_us: -12
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: Enabling GPS mode for concentrator counter
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: Starting beacon loop
Feb 11 23:12:00 gw1 user.debug chirpstack-concentratord-sx1301[522]: No beacon frequencies configured, disabling beaconing
Feb 11 23:12:01 gw1 user.warn chirpstack-concentratord-sx1301[522]: GPS time reference is not valid, age: 1581462721.831991473s
Feb 11 23:12:02 gw1 user.warn chirpstack-concentratord-sx1301[522]: GPS time reference is not valid, age: 1581462722.832791572s
mrbubble62 commented 4 years ago

I built the firmware image to force ttyS0. (I made the change in chirpstack-concentratord/chirpstack-concentratord-sx1301/src/config/vendor/generic/us915.rs) But the concentratord is not happy

Enabling GPS mode for concentrator counter
get gps coordinates failed, error: lgw_gps_get failed
GPS time reference is not valid, age: 1581597658.106345851s
GPS coordinates sync completed, coords: Coordinates { latitude: 38.92504168333333, longitude: -77.06265346666666, altitude: -96 }, coords_error: Coordinates { latitude: 0.0, longitude: 0.0, altitud

I think the GPS data is getting corrupted due to the software UART. I will have to go back to getting ttyAMA0 working if I want GPS support.

brocaar commented 4 years ago

Closing this issue as it also has been reported here: https://github.com/brocaar/chirpstack-gateway-os/issues/37.