GPSMTA vendor dialect on Traccar UDP 5038 — datagram listener, not a TCP ASCII twin.
UDP 5038.
Stock GPSMTA entry is UDP.
No — Positrex UDP 5252 / other decoder.
None on GpsmtaProtocol.
No.
GPSMTA is one of the explicitly UDP stock listeners in Traccar (TrackerServer UDP flag) on port 5038. GpsmtaProtocolDecoder consumes datagrams; pointing a TCP-only tool at 5038 will look like “platform down.”
Positrex uses UDP 5252 with a different decoder. Operators who “just open a UDP hole” still must pick the matching grammar.
AIS on TCP 5130 is unrelated maritime NMEA. GPSMTA is a vendor tracker UDP path.
TCP instructions → wrong protocol.
Include NAT phone-home expectations.
tcpdump -i any udp port 5038.
Silence with TCP SYNs means wrong transport.
Best BYOD evidence for UDP dialects.
Setup
Use these rows only after confirming the tracker password and SIM settings. Command families can differ between brands even when they use the same protocol.
Setup guidance
Traxelio can receive this model, but public SMS setup depends on SIM or model settings.
Reference
| Parameter | Value |
|---|---|
| Port |
5038
|
All Models
Start with the strongest matches, then use pagination or brand pages for the full compatibility list.
Client using TCP toward a UDP service.
Wrong UDP protocol (often Positrex vs GPSMTA).
Shorten report interval or add keepalives per vendor guidance.
FAQ
Most Traxelio long-tail pages are TCP; GPSMTA’s failure mode is transport mismatch.
GpsmtaProtocolDecoder.