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Document raw binary routing

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Janez T
2026-03-05 08:51:18 +01:00
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docs/image-mode-technical.md
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@@ -248,6 +248,16 @@ Fallback defaults are used when radio params are unavailable: `SF10`, `BW250kHz`
- Raw return path requires a valid direct route to requester.
- Available on iOS and Android (`image_picker` + `flutter_avif`).
### 11.1 Raw Binary Routing Semantics
- Image fragment payloads use companion command `CMD_SEND_RAW_DATA` (`25` / `0x19`).
- Companion push back to the app is `PUSH_CODE_RAW_DATA` (`0x84`).
- Over-the-air packet type for this flow is `PAYLOAD_TYPE_RAW_CUSTOM` (`0x0F`).
- This flow is direct-route only, not flood/broadcast:
- it is sent to one destination path;
- only nodes on that path relay it;
- it is **not** received by everyone in the mesh.
## 12. High-Level Sequence
```mermaid