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The CALIBRATE_ALL (0x7F) command inside resetAGC() clears bit 0 of the undocumented 0x8B5 register. That bit is set once in init() by #9571 and #9777 to improve SX1262 RX sensitivity, and the AGC-reset path was not re-applying it. Result: every SX1262 node silently loses the RX sensitivity patch ~60s after boot and never recovers until reboot. Empirically confirmed on Heltec Mesh Node T114 (nRF52840 + SX1262): - Post-calibration read of 0x8B5 = 0x04 (bit 0 cleared) - After re-apply: 0x05 (bit 0 set) Reproducible every AGC_RESET_INTERVAL_MS tick. Fix re-applies the register bit alongside the existing post-calibration re-applies (setDio2AsRfSwitch, setRxBoostedGainMode).
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! 🚀
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