using Traccar 6.14.5, self-hosted. Device is a SEEWORLD P5 on port 5023. Device Model field is set to SEEWORLD.
The device logs in successfully and the server acknowledges it. The next packet it sends throws a decoder exception, the connection is closed, and the device reconnects and repeats.
log from traccar:
2026-07-29 13:40:41 INFO: [Tbb27c9ac] connected
2026-07-29 13:40:42 INFO: [Tbb27c9ac: gt06 < ...] 78780d010357956370796379000011950d0a
2026-07-29 13:40:42 INFO: [Tbb27c9ac: gt06 > ...] 787805010000c8550d0a
2026-07-29 13:40:43 INFO: [Tbb27c9ac: gt06 < ...] 787818a300000005321e020000000002584f000100060000008f920d0a
2026-07-29 13:40:43 WARN: [Tbb27c9ac] error - readerIndex(27) + length(3) exceeds writerIndex(29): UnpooledSlicedByteBuf(ridx: 27, widx: 29, cap: 29/29) - IndexOutOfBoundsException (... < Gt06ProtocolDecoder:388 < *:860 < *:1624 < ExtendedObjectDecoder:72 < ...)
2026-07-29 13:40:43 INFO: [Tbb27c9ac] disconnected
Has anybody else had the same problem? I am wondering if its decoder problem or something else?
I have asked SEEWORLD if there is special protocol documentation for this P5 device and will post it here if they provide it.
These links provide more detailed logs:
https://drive.google.com/file/d/1oIkJceCzNviEuO1bhhn1ftO1gQpbsGYt/view?usp=sharing
https://drive.google.com/file/d/1tzoLYU3B30QQQ6noHLV5CfoD1qd2ixOb/view?usp=sharing
Do you have the protocol documentation?
not currently, I asked SEEWORLD for it and just waiting for their reply, I can share it here if/when I get it
Yes please share once you have it.
Perfect! the device is working and reporting the location now, thanks for the quick response
using Traccar 6.14.5, self-hosted. Device is a SEEWORLD P5 on port 5023. Device Model field is set to SEEWORLD.
The device logs in successfully and the server acknowledges it. The next packet it sends throws a decoder exception, the connection is closed, and the device reconnects and repeats.
log from traccar:
Has anybody else had the same problem? I am wondering if its decoder problem or something else?
I have asked SEEWORLD if there is special protocol documentation for this P5 device and will post it here if they provide it.
These links provide more detailed logs:
https://drive.google.com/file/d/1oIkJceCzNviEuO1bhhn1ftO1gQpbsGYt/view?usp=sharing
https://drive.google.com/file/d/1tzoLYU3B30QQQ6noHLV5CfoD1qd2ixOb/view?usp=sharing