mirror of
https://github.com/meshtastic/firmware.git
synced 2026-11-07 23:04:49 -05:00
Jonathan BennettandClaude Opus 5
eac6bed13a
The hold ran for getPacketTime(DATA_PAYLOAD_LEN + sizeof(PacketHeader)): 249 bytes at our own coding rate. A sender's header carries its own CR, up to 4/8, and that header is unreadable when the hold starts, so a legal 255-byte frame at CR 4/8 with CRC outlives the hold and we key up over it. That is the case the hold exists for, since LoRa we cannot decode - a foreign sync word - never produces HEADER_VALID at all. maxRxFrameMsec() times the 255-byte PHY frame at CR 4/8 with CRC from the configured modem, through the radio's own calculateTimeOnAir(), and falls back to getPacketTime(MAX_LORA_PAYLOAD_LEN) if the radio answers an error code (#11935). At SHORT_TURBO that is 159 ms rather than 100 ms, at LONG_FAST 3.3 s rather than 2.1 s. The HEADER_VALID ageing in receiveDetected() takes the same bound, for the same reason. checkStaleRxFlags() and checkCadHandoffTimeout() keep the shorter window: they decide a latched flag is dead and recover the chip, where waiting longer delays the recovery rather than protecting a frame. Three test cases in test/test_radio pin the sizing, the error fallback and that the hold outlives the flag clear that starts it. FakeIrqRadio now answers calculateTimeOnAir() and honours a clear. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CStem6K6MQRBNR8YCFgtCE
Meshtastic Firmware
Overview
This repository contains the official device firmware for Meshtastic, an open-source LoRa mesh networking project designed for long-range, low-power communication without relying on internet or cellular infrastructure. The firmware supports various hardware platforms, including ESP32, nRF52, RP2040/RP2350, and Linux-based devices.
Meshtastic enables text messaging, location sharing, and telemetry over a decentralized mesh network, making it ideal for outdoor adventures, emergency preparedness, and remote operations.
Get Started
- 🔧 Building Instructions - Learn how to compile the firmware from source.
- ⚡ Flashing Instructions - Install or update the firmware on your device.
Join our community and help improve Meshtastic! 🚀
Stats
