ZgRNS Git Node
Commit fbe0dae829648df567b2c899a4c1e62adb8d6b20
Parents : a53f24a
Author : varna9000 <39020101+varna9000@users.noreply.github.com>
Date : 2026-07-05T16:22:16+03:00
README: note LBT/CSMA options, repeater hardening, post-sync re-announce, webp color fix
Changes
Diff
diff --git a/README.md b/README.md
index 8c69e69..8ad411f 100644
--- a/README.md
+++ b/README.md
@@ -202,7 +202,7 @@ isn't installed.
- **Config**: WiFi creds.
- **How to use**: send `image` from MeshChat / Sideband to get a photo back (delivered via a Link + Resource transfer). Send `help` or `settings` to see the live controls.
- **Image format & quality**: resolution, WebP quality, downscale, exposure, flash and night mode are all adjustable at runtime by messaging the node ā see **[Camera image settings (JPEG & WebP)](docs/CAMERA_WEBP.md)** for every parameter and the size/quality trade-offs.
-- **WebP encoder**: the optional native module `webp_fast.mpy` in `/lib` (built from [`tools/natmod/webp_fast/`](tools/natmod/webp_fast/)). Without it the node simply sends JPEG.
+- **WebP encoder**: the optional native module `webp_fast.mpy` in `/lib` (built from [`tools/natmod/webp_fast/`](tools/natmod/webp_fast/)). Without it the node simply sends JPEG. *Note: builds before July 2026 swapped red/blue in every image (pink skies, blue foliage) ā a BGR/RGB mismatch in the JPEG decoder, since fixed; update `/lib/webp_fast_xtensawin.mpy` if your photos look like that.*
For direct (non-LXMF) capture you can also use the peripheral module from the REPL:
@@ -336,6 +336,10 @@ The pins are merged in at startup. Any pin set explicitly on the interface overr
- `syncword`: `0x1424` ā Reticulum/RNode-compatible.
- `dio2_rf_sw`: `True` on Wio-SX1262 (radio drives DIO2 as RF switch internally).
- `dio3_tcxo_millivolts`: `1800` on Wio-SX1262 (TCXO). `None` to disable (crystal-only modules).
+- `lbt_rssi`: CSMA/listen-before-talk busy threshold in dBm (default `-100`, `None` disables). Every frame TX first probes the channel and defers in short random slots while it's busy ā same etiquette as RNode firmware, essential when a repeater shares the channel.
+- `lbt_max_ms`: max LBT wait before transmitting anyway (default `2000`).
+
+The receive path is also hardened against **transparent repeaters** (devices that re-transmit every frame verbatim): duplicate halves of split packets (>254 B) are detected and dropped instead of corrupting reassembly.
### E32 LoRa interface (EByte E32-900T20D)
@@ -506,6 +510,8 @@ Two modes:
The sync runs **once per power-on**, only while the clock is still unset ā it never re-adjusts mid-session. A reboot resets the RTC to 2000, and the node re-syncs from the next qualifying packet. After syncing, both outgoing message timestamps and announce timestamps are correct for the rest of the session.
+The moment the clock syncs, the node **automatically re-announces** all its destinations: announces sent before sync carry a year-2000 emission timestamp and are rejected as stale replays by peers that knew the node from a previous boot ā without the re-announce, a rebooted node would stay invisible to the mesh until its next periodic announce.
+
> The ESP32's internal RTC keeps time only while powered ā it does not survive a full power cycle. For instant-correct time at boot with no peer audible, add a battery-backed RTC (e.g. DS3231 over IĀ²C).
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