Time sync rejected issue when using sensecap gateway with basic station on things network or AWS network

Products & Technology LoRa
#1

Hello all,
I am trying to connect my sensecap gateway with AWS network using basic station. But i get the error - “time sync rejected”. I tried to look for solutions but couldn’t find any online. I tried using things network as well but even that one had issues when using basic station. The error messages are as follows -

Tue Jul 30 11:38:09 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (57 retries): -119.8ppm (threshold 100.0ppm)
Tue Jul 30 11:38:11 2024 daemon.info station[4640]: [SYN:INFO] Time sync qualities: min=131 q90=175 max=239 (previous q90=2780)
Tue Jul 30 11:38:12 2024 daemon.info station[4640]: [SYN:INFO] MCU/SX130X drift stats: min: -117.5ppm  q50: -125.3ppm  q80: -130.6ppm  max: -133.6ppm - threshold q90: -132.6ppm
Tue Jul 30 11:38:12 2024 daemon.info station[4640]: [SYN:INFO] Mean MCU drift vs SX130X#0: -125.1ppm
Tue Jul 30 11:38:12 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (60 retries): -117.5ppm (threshold 100.0ppm)
Tue Jul 30 11:38:15 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (63 retries): -115.6ppm (threshold 100.0ppm)
Tue Jul 30 11:38:18 2024 daemon.info station[4640]: [SYN:VERB] Time sync rejected: quality=183 threshold=175
Tue Jul 30 11:38:21 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (66 retries): -112.6ppm (threshold 100.0ppm)
Tue Jul 30 11:38:24 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (69 retries): -111.1ppm (threshold 100.0ppm)
Tue Jul 30 11:38:27 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (72 retries): -109.5ppm (threshold 100.0ppm)
Tue Jul 30 11:38:30 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (75 retries): -108.0ppm (threshold 100.0ppm)
Tue Jul 30 11:38:32 2024 daemon.info station[4640]: [SYN:VERB] Time sync rejected: quality=181 threshold=175
Tue Jul 30 11:38:35 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (78 retries): -105.6ppm (threshold 100.0ppm)
Tue Jul 30 11:38:36 2024 daemon.info station[4640]: [SYN:VERB] Time sync rejected: quality=189 threshold=175
Tue Jul 30 11:38:37 2024 daemon.info station[4640]: [S2E:VERB] RX 921.6MHz DR5 SF7/BW125 snr=15.0 rssi=-30 xtime=0x7500000561A6E9 - jreq MHdr=00 JoinEUI=e7bb:279b:8dee:3e52 DevEUI=2cf7:f1c0:5460:307 DevNonce=39145 MIC=-1659182163
Tue Jul 30 11:38:39 2024 daemon.info station[4640]: [SYN:INFO] MCU/SX130X drift stats: min: -103.9ppm  q50: -110.5ppm  q80: -114.9ppm  max: -116.9ppm - threshold q90: -116.4ppm
Tue Jul 30 11:38:39 2024 daemon.info station[4640]: [SYN:INFO] Mean MCU drift vs SX130X#0: -110.4ppm
Tue Jul 30 11:38:40 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (81 retries): -103.4ppm (threshold 100.0ppm)
Tue Jul 30 11:38:41 2024 daemon.info station[4640]: [S2E:VERB] RX 921.4MHz DR2 SF10/BW125 snr=-10.0 rssi=-118 xtime=0x75000005A51DA6 - jreq MHdr=00 JoinEUI=24e1:24c0:2a:1 DevEUI=24e1:2460:1d13:4290 DevNonce=47980 MIC=2129450076
Tue Jul 30 11:38:44 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (84 retries): -102.1ppm (threshold 100.0ppm)
Tue Jul 30 11:38:46 2024 daemon.info station[4640]: [SYN:INFO] Time sync qualities: min=143 q90=181 max=189 (previous q90=175)
Tue Jul 30 11:38:46 2024 daemon.info station[4640]: {"state":1,"temperature":0,"rx_sum":4,"report_time":1722309708,"tx_sum":0}
Tue Jul 30 11:38:46 2024 daemon.info station[4640]: [SYS:INFO] lora info statistics: rx:5 (+4), tx:0 (+0)
Tue Jul 30 11:38:46 2024 daemon.info station[4640]: [SYS:INFO] ubus: ubus -S call sensecap lora '{"rx_sum":4,"tx_sum":0,"report_time":1722309708, "state":1}'
Tue Jul 30 11:38:47 2024 daemon.info station[4640]: [SYN:WARN] Repeated excessive clock drifts between MCU/SX130X#0 (87 retries): -100.8ppm (threshold 100.0ppm)
Tue Jul 30 11:38:52 2024 daemon.info station[4640]: [S2E:VERB] RX 921.6MHz DR5 SF7/BW125 snr=15.5 rssi=-28 xtime=0x75000006431EFA - jreq MHdr=00 JoinEUI=e7bb:279b:8dee:3e52 DevEUI=2cf7:f1c0:5460:307 DevNonce=39146 MIC=790138883
Tue Jul 30 11:38:53 2024 daemon.info station[4640]: [RAL:DEBU] [CRC FAIL] 921.600MHz -10.25/-115.5 SF7/BW125 (mod=16/dr=7/bw=4) xtick=065dcc23 (106810403) 41 bytes: 40BF39B606823EDB8800552C39966EE6995FB8370E6DB921EB1802F9319C1C3D2B41201D21ACF3F29B
Tue Jul 30 11:38:54 2024 daemon.info station[4640]: [SYN:VERB] Time sync rejected: quality=186 threshold=181
Tue Jul 30 11:39:00 2024 daemon.info station[4640]: [SYN:VERB] Time sync rejected: quality=187 threshold=181

Can anyone help me with this? and does anyone know why this is happening? Thank you for your time.

#2

You can try to increase the allowed drift threshold if your hardware and firmware support such an adjustment. Here is a basic outline of how you might adjust this setting (consult your device’s documentation for exact steps):

  1. Access the configuration file (station.conf) on your gateway.
  2. Look for a parameter related to time sync drift or thresholds.
  3. Increase the threshold value slightly and test to see if synchronization succeeds.
#3

I am having exactly the same issue (basic station to The Things cloud). Did you find a solution? Have you found any functional issues caused by the time sync rejections?