fixtime different of devicetime GPS103

Evanderson3 years ago

Dear Anton,

In Mysql Traccar sometimes records the following times:

servertime: 2021-05-09 10:38:02
devicetime: 2021-05-09 10:38:02
fixtime: 2021-05-09 05:46:13

the only thing that is wrong is "fixtime".

I use GPS103 and all set to UTC 0.

What can be happening?

This happens occasionally, can you help me?

Traccar 4.10.

Anton Tananaev3 years ago

What makes you think it's wrong?

Evanderson3 years ago

These positions are out of chronological sequence.

If you look at the history based on "devicetime" it is ok, but if you look at it based on "fixtime" it is out of sequence.

Anton Tananaev3 years ago

You only provided one data point, so I'm not sure what sequence you are talking about.

Evanderson3 years ago

Hello Anton,

+-----------+---------------------+---------------------+---------------------+
| id        | servertime          | devicetime          | fixtime             |
+-----------+---------------------+---------------------+---------------------+
| 234945386 | 2021-05-12 09:47:56 | 2021-05-12 09:47:56 | 2021-05-12 06:16:25 |
| 234945414 | 2021-05-12 09:47:58 | 2021-05-12 09:47:58 | 2021-05-12 06:16:25 |
| 234945744 | 2021-05-12 09:48:28 | 2021-05-12 09:48:26 | 2021-05-12 09:48:26 |
| 234946040 | 2021-05-12 09:48:58 | 2021-05-12 09:48:56 | 2021-05-12 09:48:56 |
| 234946337 | 2021-05-12 09:49:28 | 2021-05-12 09:49:26 | 2021-05-12 09:49:26 |
| 234946684 | 2021-05-12 09:49:58 | 2021-05-12 09:49:56 | 2021-05-12 09:49:56 |
| 234947001 | 2021-05-12 09:50:28 | 2021-05-12 09:50:26 | 2021-05-12 09:50:26 |
| 234947343 | 2021-05-12 09:50:58 | 2021-05-12 09:50:56 | 2021-05-12 09:50:56 |
| 234947662 | 2021-05-12 09:51:28 | 2021-05-12 09:51:26 | 2021-05-12 09:51:26 |
| 234947996 | 2021-05-12 09:51:58 | 2021-05-12 09:51:56 | 2021-05-12 09:51:56 |
+-----------+---------------------+---------------------+---------------------+

See 10 records on the same device.

Only the first two have this divergence.

Anton Tananaev3 years ago

It probably means that your device didn't have a GPS fix and reported last known location. Or it didn't report any location and server used last location. Very common situation.

Evanderson3 years ago

Hello Anton,

If the device did not have a GPS position, it means that it was invalid, right?

I would like to discard these invalid positions, can you help me?

+-----------+---------------------+---------------------+---------------------+
| id        | servertime          | devicetime          | fixtime             |
+-----------+---------------------+---------------------+---------------------+
| 234854461 | 2021-05-12 06:12:30 | 2021-05-12 06:12:25 | 2021-05-12 06:12:25 |
| 234854637 | 2021-05-12 06:12:57 | 2021-05-12 06:12:55 | 2021-05-12 06:12:55 |
| 234854798 | 2021-05-12 06:13:27 | 2021-05-12 06:13:25 | 2021-05-12 06:13:25 |
| 234854973 | 2021-05-12 06:13:57 | 2021-05-12 06:13:55 | 2021-05-12 06:13:55 |
| 234855144 | 2021-05-12 06:14:27 | 2021-05-12 06:14:25 | 2021-05-12 06:14:25 |
| 234855326 | 2021-05-12 06:14:57 | 2021-05-12 06:14:55 | 2021-05-12 06:14:55 |
| 234855528 | 2021-05-12 06:15:27 | 2021-05-12 06:15:25 | 2021-05-12 06:15:25 |
| 234855705 | 2021-05-12 06:15:57 | 2021-05-12 06:15:55 | 2021-05-12 06:15:55 |
| 234855873 | 2021-05-12 06:16:27 | 2021-05-12 06:16:25 | 2021-05-12 06:16:25 |
*| 234945386 | 2021-05-12 09:47:56 | 2021-05-12 09:47:56 | 2021-05-12 06:16:25 |*
*| 234945414 | 2021-05-12 09:47:58 | 2021-05-12 09:47:58 | 2021-05-12 06:16:25 |*
| 234945744 | 2021-05-12 09:48:28 | 2021-05-12 09:48:26 | 2021-05-12 09:48:26 |
| 234946040 | 2021-05-12 09:48:58 | 2021-05-12 09:48:56 | 2021-05-12 09:48:56 |
| 234946337 | 2021-05-12 09:49:28 | 2021-05-12 09:49:26 | 2021-05-12 09:49:26 |
| 234946684 | 2021-05-12 09:49:58 | 2021-05-12 09:49:56 | 2021-05-12 09:49:56 |
| 234947001 | 2021-05-12 09:50:28 | 2021-05-12 09:50:26 | 2021-05-12 09:50:26 |
| 234947343 | 2021-05-12 09:50:58 | 2021-05-12 09:50:56 | 2021-05-12 09:50:56 |
| 234947662 | 2021-05-12 09:51:28 | 2021-05-12 09:51:26 | 2021-05-12 09:51:26 |
| 234947996 | 2021-05-12 09:51:58 | 2021-05-12 09:51:56 | 2021-05-12 09:51:56 |
| 234948274 | 2021-05-12 09:52:23 | 2021-05-12 09:52:20 | 2021-05-12 09:52:20 |
+-----------+---------------------+---------------------+---------------------+

I searched for positions before and after the one in question, note that only they are out of sequence.

Anton Tananaev3 years ago

If the device did not have a GPS position, it means that it was invalid, right?

No, it does not. But you can filter those out by duplicate filter.

Evanderson3 years ago

Hello. It is possible to make a correction in traccar confg.

if devicetime and servertime are different from fixtime. fixtime = servertime?

Anton Tananaev3 years ago

No, it's not possible to configure something like that in the config.