Issue with reported speeds

Bear last year

I’m still having trouble with the speed display. The incoming JSON reports a speed of 31.9 m/s, but the server is showing 36.72 mph. I was actually going about 70 mph at the time. I'm on server version 6.7.3 using the docker image. Any idea whats going on here?
Thanks!

Anton Tananaev last year

Server logs please.

Bear last year 
2025-06-24 13:33:21  INFO: [T8ab06b98] connected
2025-06-24 13:33:21  INFO: [T8ab06b98: osmand < 172.17.0.1] POST / HTTP/1.1\r\nHost: 192.168.10.10:5055\r\nUser-Agent: python-requests/2.32.4\r\nAccept-Encoding: gzip, deflate\r\nAccept: */*\r\nConnection: keep-alive\r\nContent-Length: 272\r\nContent-Type: application/x-www-form-urlencoded\r\n\r\nid=1&lat=51.6*************&lon=0.40**************&timestamp=2025-06-24T12%3A33%3A21.000Z&odometer=297879.9&speed=31.91&heading=218.05&accuracy=2&altitude=49.21&Moving=Yes&Activity=in_vehicle&Battery+Level=50%25&Battery+Charging=Yes&Speed+Limit=70+mph&Overpass+Source=local
2025-06-24 13:33:21  WARN: Position forwarding failed: 0 pending - HTTP code 404 - RuntimeException (PositionForwarderJson:80 < *:73 < ...)
2025-06-24 13:33:21  INFO: [T8ab06b98] id: 1, time: 2025-06-24 13:33:21, lat: 51.6****, lon: 0.40***, speed: 31.9, course: 218.1, accuracy: 2.0
2025-06-24 13:33:21  INFO: [T8ab06b98: osmand > 172.17.0.1] HTTP/1.1 200 OK\r\ncontent-length: 0\r\n\r\n
2025-06-24 13:33:21  INFO: [T8ab06b98] disconnected
Anton Tananaev last year

I don't see a JSON.

Bear last year

Ah sorry. Is this what you're looking for?

2025-06-24 16:29:32 INFO 172.17.0.1 - - [24/Jun/2025 16:29:32] "POST / HTTP/1.1" 200 -
2025-06-24 16:29:32 INFO request.data: b'{"location":{"timestamp":"2025-06-24T15:10:21.243Z","coords":{"latitude":51.6******,"longitude":0.33*****,"accuracy":3.6,"speed":13.52,"heading":272,"altitude":122.84},"is_moving":true,"odometer":132982.5,"battery":{"level":0.65,"is_charging":false},"activity":{"type":"in_vehicle"},"extras":{},"_":"&id=2&lat=51.6******&lon=0.33*****&timestamp=2025-06-24T15:10:21.243Z&"},"device_id":"2"}
Anton Tananaev last year

This is not a standard Traccar log. If you want some help, please provide full and complete context.

Bear last year

Where do I find the JSON's in the tracker-server.log files?