PT502 Protocol ($type,id A/V CSV)
PT502 on TCP 5017: $type,id,hhmmss.sss,A/V lat/lon CSV, optional $PHO/$PHD photo, no map-sentence reply.
On Traxelio
What PT502 trackers do once they are on Traxelio
Hardware that speaks this protocol
Devices that speak PT502
Point this protocol at Traxelio
Point PT502 at Traxelio
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1
Capture a PT502 fingerprint
Confirm a $type,id ASCII line with A or V after fractional time. Reject %imei,$GPRMC and @G#@ CSV.
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2
Point PT502 at 5017
Configure only PT502 to TCP 5017. PT502 on 5017 is not PT3000 on 5045 or PT60 on 5164.
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3
Do not wait for a map-sentence ACK
A map sentence has no reply. Only a $PHO photo open is followed by #PHD offset,size CR LF.
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4
Prove one PT502 fix
Send one $type,id sentence whose status is A on 5017 and verify a map point.
Still offline after GPS lock
PT502 still not landing
- PT502 aimed at the wrong port
PT502 on 5017 is not PT3000 on 5045 or PT60 on 5164.
- Always V, empty map
Status V binds the id and will not plot. Send one sentence whose status is A.
- Only $PHO / $PHD, no coordinates
Photo rows reuse the last map point. Send a $type,id sentence with status A first.
FAQ
PT502 leftover questions
Does PT502 send Concox 0x7878 frames?
No. PT502 is $type,id ASCII with A or V after fractional time. Concox families use 0x7878 binary login.
Which letter plots a PT502 fix?
A plots. V is void and will not plot. A $PHO or $PHD photo row reuses the last map point.
What is $PHO on a PT502 unit?
$PHO opens a photo size. $PHD is photo payload. Traxelio may answer #PHD{offset},{size} CR LF. Neither invents coordinates.
Where is the PT502 unit id?
The first numeric field after the $ type token, before hhmmss.sss and the A or V letter.
Can a PT502 unit run SMS setup or a controlled-action flow?
This dialect is positions only. There is no SMS family on this row.