Hi
I encountered an issue with chirpstack-concentratord after the log message "Processing u-blox NAV-TIMEGPS" appears.
Testing version:
- chirpstack-concentratord-sx1302 4.6.0
- chirpstack-gateway-mesh 4.1.2
- chirpstack-mqtt-forwarder 4.5.1
Log
Mar 26 15:01:34 user.info chirpstack-concentratord-sx1302[15519]: Frame received, uplink_id: 3014930249, count_us: 587122365, freq: 922800000, bw: 125000, mod: LoRa, dr: SF7, ftime_received: false, ftime_ns: 0
Mar 26 15:01:34 user.info chirpstack-gateway-mesh[15585]: Unwrapping relayed uplink, uplink_id: 3014930249, mesh_packet: [Uplink hop_count: 1, uplink_id: 1157, relay_id: f10e6975, mic: 029fac51]
Mar 26 15:01:34 user.info chirpstack-gateway-mesh[15585]: Sending event
Mar 26 15:01:34 user.info chirpstack-mqtt-forwarder[15611]: Received uplink frame, uplink_id: 3014930249
Mar 26 15:01:34 user.info chirpstack-mqtt-forwarder[15611]: Sending uplink event, uplink_id: 3014930249, topic: as923/gateway/0016c001ff17da50/event/up
Mar 26 15:01:34 user.debug chirpstack-mqtt-forwarder[15611]: Publish. Topic = as923/gateway/0016c001ff17da50/event/up, Pkid = 0, Payload Size = 170
Mar 26 15:01:34 user.debug chirpstack-concentratord-sx1302[15519]: Processing u-blox NAV-TIMEGPS
Mar 26 15:01:34 user.debug chirpstack-concentratord-sx1302[15519]: GPS time sync completed, count_us: 586600156, system_time: 2026-03-26 15:01:34 (UTC), gps_time: 2026-03-26 15:01:33 (UTC), gps_epoch: 1458572512.000308587s, xtal_err: 1
Mar 26 15:01:34 user.debug chirpstack-concentratord-sx1302[15519]: Processing NMEA RMC
Mar 26 15:01:34 user.debug chirpstack-concentratord-sx1302[15519]: GPS time reference is valid
Mar 26 15:01:34 user.debug chirpstack-concentratord-sx1302[15519]: Tracking with low-pass filter, x: 1, xtal_correct: 0.9999995094547011
Mar 26 15:01:34 user.debug chirpstack-concentratord-sx1302[15519]: GPS coordinates sync completed, coords: Some(Coordinates { latitude: 24.872157333333334, longitude: 121.00918916666667, altitude: 116 }), coords_error: Coordinates { latitude: 0.0, longitude: 0.0, altitude: 0 }
Mar 26 15:01:35 user.info chirpstack-concentratord-sx1302[15519]: Frame received, uplink_id: 3102284955, count_us: 588209980, freq: 923200000, bw: 125000, mod: LoRa, dr: SF10, ftime_received: false, ftime_ns: 0
Mar 26 15:01:35 user.info chirpstack-concentratord-sx1302[15519]: Frame received, uplink_id: 4276748298, count_us: 588392531, freq: 922200000, bw: 125000, mod: LoRa, dr: SF7, ftime_received: false, ftime_ns: 0
Mar 26 15:01:35 user.info chirpstack-gateway-mesh[15585]: Unwrapping relayed uplink, uplink_id: 4276748298, mesh_packet: [Uplink hop_count: 1, uplink_id: 102, relay_id: f10cb5c6, mic: 673b071d]
Mar 26 15:01:35 user.info chirpstack-gateway-mesh[15585]: Sending event
Mar 26 15:01:35 user.debug chirpstack-concentratord-sx1302[15519]: Processing u-blox NAV-TIMEGPS
Mar 26 15:01:35 user.info chirpstack-mqtt-forwarder[15611]: Received uplink frame, uplink_id: 4276748298
Mar 26 15:01:35 user.info chirpstack-mqtt-forwarder[15611]: Sending uplink event, uplink_id: 4276748298, topic: as923/gateway/0016c001ff17da50/event/up
Mar 26 15:01:35 user.debug chirpstack-concentratord-sx1302[15519]: GPS time sync completed, count_us: 587600157, system_time: 2026-03-26 15:01:35 (UTC), gps_time: 2026-03-26 15:01:34 (UTC), gps_epoch: 1458572513.000322606s, xtal_err: 1.000001
Mar 26 15:01:35 user.debug chirpstack-mqtt-forwarder[15611]: Publish. Topic = as923/gateway/0016c001ff17da50/event/up, Pkid = 0, Payload Size = 169
Mar 26 15:01:35 user.debug chirpstack-concentratord-sx1302[15519]: Processing NMEA RMC
Mar 26 15:01:35 user.debug chirpstack-concentratord-sx1302[15519]: GPS coordinates sync completed, coords: Some(Coordinates { latitude: 24.872156166666667, longitude: 121.00918933333334, altitude: 116 }), coords_error: Coordinates { latitude: 0.0, longitude: 0.0, altitude: 0 }
Mar 26 15:01:36 user.debug chirpstack-concentratord-sx1302[15519]: Processing u-blox NAV-TIMEGPS
After the log "Processing u-blox NAV-TIMEGPS", the concentratord stops functioning. The border gateway can no longer receive LoRa packets until the concentratord service is restarted.
The gateway is using a u-blox GPS module. Has anyone encountered a similar issue?
Thanks.
