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Unfortunately there isn't really a defined APRS TO address. Most use APXXXX with the last 4 chars identifying the software used to send the frames, but the MIC-E format has what look like random characters in the TO call. This is one of the rather unfortunate features of APRS.? The only safe way I could find was to treat any UI frame on an IGate input frequency as a potential APRS frame and send to APRS-IS. The IS server will flan any it does not know how to process.

73,
John

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On 22/09/2024 15:28, Tom M0LTE wrote:

Hi John/all

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I have set up a receive-only igate port on my BPQ node (GB7RDG), with the sole purpose of forwarding APRS-formatted frames (position, telemetry) from a remote station (M0LTE-2, non-BPQ) to APRS-IS

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Right now, I have that remote station beaconing minutely - a UI frame from M0LTE-2 to IDENT. It is not related to APRS.

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The BPQ igate is, however, hearing those minutely beacons and forwarding them to APRS-IS (as viewed here on 's raw frame view):

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2024-09-22 15:10:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:11:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:12:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:13:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:13:59 BST:?>APRS,qAR,:\!5125.20N/00106.54WrTheale?test
2024-09-22 15:14:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:15:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:16:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:17:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:18:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:19:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:20:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:21:06 BST:?>IDENT,qAR,:Theale?tower?testing?[Unsupported packet format]
2024-09-22 15:21:23 BST:?>APRS,qAR,:\!5125.20N/00106.54WrTheale?test

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The two "Theale test" rows in black are one-off test beacons I did send, in APRS format, to callsign "APRS", deliberately.

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I don't want BPQ to blindly forward all UI frames to APRS-IS- is there a way to filter it to only igate frames destined for, say, APRS, or WIDE1-1, or whatever the recommended path is nowadays?

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Thanks

Tom