release: firmware v0.2.0

Major architecture reorganization, Wio Tracker L1 support, LED blink
on packet activity, native USB for Heltec V3 (hardware mod required).
See CHANGELOG.md for full details.

CHANGELOG.md

@@ -5,7 +5,42 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/),
 and this project adheres to [Semantic Versioning](https://semver.org/).
 
-## [0.1.0] - Unreleased
+## [0.2.0] - 2026-04-07
+
+### Added
+
+- Wio Tracker L1 board support (nRF52840 + SX1262, SH1106 OLED)
+- LED blink on packet activity: brief flash on RX and TX when display is on
+  - RX brightness scales with SNR (stronger signal = brighter)
+  - Works on all boards with a user LED (Heltec V3/V4, Wio Tracker)
+- Native USB CDC-ACM support for Heltec V3 (requires hardware mod: solder R29/R3)
+- `heltec_v3_uart` feature for stock (unmodified) V3 boards via CP2102 bridge
+- `RgbLed` trait and `SimpleLed` driver for GPIO-based LEDs
+- `LoRaBoard` trait with full associated types (`RadioParts`, `CommParts`,
+  `DisplayParts`, `DisplayDriver`, `LedDriver`) and `BoardParts<R, C, D, L>` struct
+
+### Changed
+
+- Major firmware architecture reorganization:
+  - `hal/` module for MCU-specific primitives (ESP32-S3, nRF52840)
+  - `driver/` module for hardware peripheral drivers (SH1106, SimpleLed)
+  - `host/` module for unified USB/UART communication with internal cfg dispatch
+  - `board/` contains only board definitions — no MCU helpers or drivers mixed in
+  - Board files are declarative wiring diagrams calling hal primitives
+- `run()` function has zero board-specific conditional compilation
+- Display init moved to board layer (`create_display()`) — display task has no cfg
+- Flattened `radio/` and `display/` directories (no single-file directories)
+- `build.rs` auto-discovers boards by content (implements `LoRaBoard`) and
+  helper modules by `use super::` imports — no exclusion lists
+- `check` and `clippy` commands now use `--release` profile
+- Deduplicated USB/UART protocol framing (shared `CobsDecoder` + `route_command`)
+- Removed `ErrorCode::CrcError` (SX1262 silently drops bad-CRC packets)
+
+### Fixed
+
+- Display stuck on splash screen for UART boards (disconnected flag started true)
+
+## [0.1.0] - 2026-03-15
 
 ### Added
 

firmware/Cargo.lock

@@ -372,7 +372,7 @@ dependencies = [
 
 [[package]]
 name = "donglora"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "cfg-if",
  "cortex-m",

firmware/Cargo.toml

@@ -3,7 +3,7 @@ members = ["."]
 
 [package]
 name = "donglora"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 build = "build.rs"
 authors = ["Stephen Waits <steve@waits.net>"]