JakubandClaude Opus 5.5
f77c7ea901
A group row's text column (and an info row's key) grows into what the controls on its right leave, and LVGL lays out children before their parent, so its labels were first measured 1 px wide; LVGL also works out a new label's height at its old width (0) before the real one. Each height that changed then took another pass up the screen: 4-6 passes per screen. rowsFit(), run before a frame's layout (LV_EVENT_REFR_START) and by layoutNow() in place of every explicit lv_obj_update_layout(), gives each new row's growing child the width the flex will give it, worked out from the other children's styles and text, and labelFit() measures wrapping labels at their real width up front. The grow stays, so a control that can't be sized ahead only falls back to the old passes. Layout on the device: Display page 34 -> 24 ms, Bot 33 -> 18, Quick 37 -> 22, Radio 26 -> 18, Diagnostics 20 -> 12. Sim screenshots of 26 screens unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
MeshCore Solo Companion Firmware
A fork of the official MeshCore companion radio firmware with a full standalone on-device UI — messages, contacts, GPS navigation and tools without a phone.
Try it live in your browser: solo.marekzegarek.com
Discussion: MeshCore Discord — Solo firmware thread
Supported devices
| Device | MCU | Display | Firmware file |
|---|---|---|---|
| Seeed Wio Tracker L1 (OLED) | nRF52840 | SSD1306 / SH1106 128 × 64 | solo-<version>-WioTrackerL1.uf2 |
| Seeed Wio Tracker L1 (E-ink) | nRF52840 | GxEPD2 250 × 122 | solo-<version>-WioTrackerL1Eink.uf2 |
| Seeed Wio Tracker L2 | ESP32-S3 | 320 × 240 touch LCD | solo-<version>-Wio-Tracker-L2-merged.bin |
| GAT562 30S Mesh Kit | nRF52840 | SSD1306 128 × 64 | solo-<version>-GAT562-30S-Mesh-Kit.uf2 |
| GAT562 Mesh Watch13 (experimental) | nRF52840 | SSD1306 128 × 64 | solo-<version>-GAT562-Mesh-Watch13.uf2 |
| Heltec LoRa32 V3 (experimental) | ESP32-S3 | SSD1306 128 × 64 | solo-<version>-Heltec-v3-merged.bin |
| Heltec LoRa32 V4 (experimental) | ESP32-S3 | SSD1306 128 × 64 | solo-<version>-heltec-v4-merged.bin |
| M5Stack Cardputer ADV (experimental) | ESP32-S3 | ST7789 TFT 240 × 135 | solo-<version>-M5Stack-Cardputer-ADV-merged.bin |
| LilyGO T-Echo Lite + KeyShield (experimental) | nRF52840 | GxEPD2 250 × 122 | solo-<version>-LilyGo-T-Echo-Lite-keyshield.uf2 |
| ProMicro (experimental) | nRF52840 | SSD1306 128 × 64 | solo-<version>-ProMicro.uf2 |
Firmware files are on the releases page. Every binary serves the companion app over both BLE and USB serial.
Heltec V3/V4 need a keyboard or joystick wired up; ProMicro needs a CardKB; the T-Echo Lite needs the KeyShield. The rest work out of the box.
Flashing
Warning
Coming from official or other custom firmware: back up your data in the companion app, then Erase flash in the MeshCore Flasher before flashing. Updating from an earlier Solo release doesn't need this unless the release notes say so.
nRF52840 boards — press reset twice quickly; the device shows up as a USB drive. Copy the .uf2 onto it.
ESP32-S3 boards — flash the -merged.bin at offset 0x0 with the MeshCore Flasher or esptool.py --chip esp32s3 write_flash 0x0 <file>-merged.bin. The Wio Tracker L2 then updates itself over WiFi (Settings › System › Firmware update).
Important
BLE has priority over USB serial: while a BLE connection is active the USB protocol is suspended.
Documentation
Documentation — getting started, messages, navigation, tools, settings, hardware and developer guides.
USB tools — on the Solo site (Chrome or Edge, Web Serial): screenshots of the device's screen and the GPS trail as GPX over USB, plus a preview of any GPX file. The same as the local scripts in tools/.
Building
pio run -e <env> -t upload # build and flash over USB
FIRMWARE_VERSION=v1.0.0 bash build.sh build-firmware <env> # release artifacts into out/
Environments are the *_solo_dual (OLED / e-ink) and *_solo_lvgl (touch) entries in solo/<board>/platformio.ini. The Wio Tracker L2 needs pio run -e Wio_Tracker_L2_idf_libs once before its first build (it rebuilds the framework libs for its ESP-IDF options). Optional hardware (CardKB, joystick, GPIO, buzzer…) is enabled with build flags. Releasing: RELEASE.md.
This README is protected from upstream merges via .gitattributes; after cloning run once git config merge.ours.driver true.