Rename the devel=sbs_rssi to devel=sbs_extra_fields and add aircraft category#139
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ok, can you rebase that into a single commit? |
…S output
Adds a new devel flag, sbs_extra_fields, which appends two optional fields
to the SBS output:
- Field 23: RSSI in dBFS (e.g. -27.3), empty if signal level unavailable
- Field 24: aircraft category from ADS-B identification frames (metype 1-4),
encoded as two hex chars (e.g. A3 = large fixed-wing, A7 = rotorcraft),
empty if not yet received
The category is derived directly from the received ADS-B DF17 message
(((0x0E - metype) << 4) | mesub) — no external database lookup required.
Both fields are controlled by a single flag to keep the extension self-
contained. Field 23 is always emitted when the flag is active so that
field 24 remains at a fixed position, regardless of whether RSSI data is
available for a given message.
Buffer size is increased from 200 to 260 bytes when the flag is active.
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wiedehopf
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Jun 8, 2026
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Author
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Thanks! |
Owner
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with the rebasing it is just nicer. (would have been too for the previous PR but it's not that important) |
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Summary
Rename the existing
--devel=sbs_rssiruntime flag to be--devel=sbs_extra_fieldsand append the aircraftcategory as field 24 of the SBS output, in addition to the existing RSSI information in field 23.
identification messages (metype 1–4) — no external database or lookup
A3) onidentification messages; empty on all other message types
Usage
Example output (MSG,1 identification frames only)
Field 24 is empty on MSG types 3–8.