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patriandClaude Opus 5.5 5c04e3f0df Convert all projects to PlatformIO

- JC3636W518 sketches: pioarduino 51.03.05 (Arduino core 3.0.5), ESP32-S3
  16MB QIO / OPI PSRAM, vendor libs via lib_extra_dirs, per-project lv_conf.h
- display_gif_embedded uses default_16MB.csv (firmware 3.4 MB > huge_app)
- elm327_wifi_bridge: espressif32 6.10.0 on esp32dev, pinned lib_deps
- elmulator: library in lib/, one env per example, duplicate copies removed
- .ino -> src/main.cpp, headers/lv_conf.h -> include/

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-23 00:20:33 +02:00

3.2 KiB

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OBD Display (2024 experiments)

Earlier attempt to show car speed from an ELM327 OBD-II adapter on the JC3636W518. Because the ESP32-S3 has no Bluetooth Classic, the design used a second (classic) ESP32 as a bridge:

ELM327 --(BT Classic SPP)--> classic ESP32 (elm327_wifi_bridge) --(WiFi AP, HTTP /speed)--> JC3636W518 (display_speed_wifi)

Split out of 2-Program Example/Demo_Arduino/ST77916_LVGL_DEMO/ on 2026-10-22 and converted to PlatformIO. History is in git.

Projects (all PlatformIO)

Folder	Runs on	What it does	Was
`display_speed_wifi/`	JC3636W518	GIF background from SD (`A:wallpaper.gif`) + joins AP `ESP32-Access-Point`, polls `http://192.168.4.1/speed`, shows it in a label	`ST77916_LVGL_DEMO/8.4/`
`display_gif_sd/`	JC3636W518	GIF from SD (`A:wallpaper.gif`) + static text label	`ST77916_LVGL_DEMO/working version/`
`display_gif_embedded/`	JC3636W518	GIF compiled into firmware (`src/loligod.c`, 2.2 MB GIF → 3.4 MB firmware, uses `default_16MB.csv` with 6.25 MB app slots). WiFi code commented out. Stops in `setup()` if no SD card	`ST77916_LVGL_DEMO/` (top level)
`elm327_wifi_bridge/`	classic ESP32 (not S3)	BT Classic → ELM327 named `OBDII` (PIN 1234), WiFi AP `ESP32-Access-Point` / `123456789`, serves `/speed` (kph)	`ST77916_LVGL_DEMO/esp23_elm327_to_wifi/`
`elmulator/`	classic ESP32	Fake ELM327 for testing without a car. Library in `lib/ELMulator`, envs `simple`, `custom`, `wifi` (BT name `OBDII`)	`ST77916_LVGL_DEMO/ELMulator-master/`
`assets/gifs/`	—	GIF files (`dump/` = unused collection)	`ST77916_LVGL_DEMO/gifs/`
`_archive/lvgl9_broken/`	—	Unfinished LVGL 9 port, does not compile, not converted	`ST77916_LVGL_DEMO/9.1/`

Build / upload

Open a project folder in VS Code with the PlatformIO extension, or from a terminal:

pio run -d display_speed_wifi                 # build
pio run -d display_speed_wifi -t upload       # flash (COM21)
pio device monitor -d display_speed_wifi      # serial monitor
pio run -d elmulator -e wifi -t upload --upload-port COMxx

(pio = %USERPROFILE%\.platformio\penv\Scripts\pio.exe if not on PATH.)

Configuration

JC3636W518 projects: pioarduino platform 51.03.05 (= Arduino core 3.0.5), board esp32-s3-devkitc-1 with 16 MB QIO flash, OPI PSRAM, huge_app.csv (3 MB app), USB-CDC on boot, COM21. Libraries come from the vendor folder via lib_extra_dirs = ../../2-Program Example/Demo_Arduino/library. Each project uses its own include/lv_conf.h (-DLV_CONF_INCLUDE_SIMPLE -Iinclude):
- display_speed_wifi: LVGL heap 4 MB in PSRAM (ps_malloc)
- display_gif_sd: LVGL heap 7 MB in PSRAM
Classic ESP32 projects: official espressif32@6.10.0 (Arduino core 2.0.17), board esp32dev, huge_app.csv. Set upload_port to the classic ESP32's COM port. Bridge libraries: powerbroker2/ELMduino@3.4.1, esphome/ESPAsyncWebServer-esphome@3.4.0.

Notes

src/montserrat_100.c (100 px digits font) is present but not referenced by any sketch yet.
SD-based GIFs use LVGL drive A: = LV_USE_FS_FATFS (reads through ESP-IDF FatFS on the SD_MMC mount). Not yet verified on hardware.

3.2 KiB Raw Blame History