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fix(mesh): widen RNode KISS-detect read window from 800ms to 2.5s

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Confirmed on real hardware: a genuine Heltec V4 RNode (firmware 1.86,
verified via rnodeconf --info against the same port) prints extra
boot/status chatter over the same serial line before answering KISS
commands. Replaying the exact probe bytes and timing budget our Rust
probe_rnode() uses showed DETECT_RESP arriving ~1.05s after the write —
past the old 800ms deadline, so a real, correctly-flashed, correctly-
responding RNode was being timed out and misclassified as "not an RNode".

2.5s leaves comfortable margin. Non-RNode devices (Meshcore/Meshtastic)
already budget ~5s each, so this doesn't meaningfully slow down detection
when the port turns out to be something else.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
ssmithx 2026-07-04 08:01:13 +00:00
parent 458b9fbbb7
commit 791618f96f
1 changed files with 8 additions and 1 deletions
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9
core/archipelago/src/mesh/reticulum.rs
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@ -47,7 +47,14 @@ const KISS_CMD_PLATFORM: u8 = 0x48;
const KISS_CMD_MCU: u8 = 0x49;
const PROBE_BAUD: u32 = 115200;
const PROBE_READ_TIMEOUT: Duration = Duration::from_millis(800);
// 800ms was too tight for real hardware: confirmed on a genuine Heltec V4
// RNode (firmware 1.86, verified via `rnodeconf --info`) that prints extra
// boot/status chatter on the same serial line before answering KISS
// commands — DETECT_RESP measured arriving ~1.05s after the probe write in
// that case. 2.5s leaves comfortable margin without meaningfully slowing
// down detection of non-RNode devices (Meshcore/Meshtastic already budget
// ~5s each).
const PROBE_READ_TIMEOUT: Duration = Duration::from_millis(2500);
/// Prefix marking an LXMF `content` string as base64 of a raw binary
/// typed-envelope payload rather than literal text. LXMF `content` travels