Jmak Protocol (~mask;fields|$ with ACK)
Jmak on TCP 5259: ~hex-mask;fields|$ rows that ACK, or { / ^ lines that ACK and never plot.
On Traxelio
What Jmak trackers do once they are on Traxelio
Hardware that speaks this protocol
Devices that speak Jmak
Point this protocol at Traxelio
Point Jmak at Traxelio
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1
Capture a Jmak fingerprint
Confirm a row that opens ~ and closes $. Reject +RRCB~ as Granit and a $ event line as ITS.
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2
Point Jmak at 5259
Configure only Jmak to TCP 5259. Jmak on 5259 is not Granit on 5113 or ITS on 5179.
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3
Treat ACK as a parse, not a fix
Traxelio answers ACK on ~ rows and on { / ^ control lines. Only ~...$ with lat/lon plots.
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4
Prove one Jmak fix
Send one ~...$ row with lat/lon on 5259 and verify a map point. Do not trust ACK alone.
Still offline after GPS lock
Jmak still not landing
- Jmak aimed at the wrong port
Jmak on 5259 is not Granit +RRCB~ on 5113 or ITS $ events on 5179.
- Got ACK, empty map
{ and ^ lines ACK and never plot. Only a ~...$ row with lat/lon draws a point.
- Tilde missing, nothing parsed
A position row must open ~ and close $. A JSON object or a caret line is not a fix.
FAQ
Jmak leftover questions
Does Jmak send Concox 0x7878 frames?
No. Jmak is ASCII that opens ~ and closes $, or a { / ^ control line. Concox families use 0x7878 binary login.
Do Jmak curly-brace or caret lines plot?
No. Those lines get ACK and never draw a point. Only a ~...$ row with lat/lon plots.
Where is the Jmak unit id?
The third semicolon field of the first pipe section, after the hex mask and the next field.
Does Jmak send an ACK?
Yes. Traxelio answers ACK on a parsed ~...$ row and on { / ^ control lines. ACK is not proof of a map point.
Can a Jmak unit run SMS setup or a controlled-action flow?
This dialect is positions only. JR07, JR09, JR10, JR11, JR12, and JR22 are listed.