Remove 2024 BT-Classic bridge, ELMulator and WiFi speed sketch

The ELM327 is read directly over BLE now. Docs updated.

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

CLAUDE.md

@@ -48,7 +48,7 @@ USB      : D-=19 D+=20
   **All of this lives in `shared/jc3636w518.ini`**; a project's `platformio.ini` only does `extra_configs` + `[shared] dir` + `extends = jc3636w518` (see `shared/README.md`).
   Libraries: `lib_deps = lvgl/lvgl@9.6.0`, `lib_extra_dirs` → `shared/lib` (board library) + vendor `2-Program Example/Demo_Arduino/library` (ESP32_Display_Panel, ESP32_IO_Expander; its lvgl 8 is not used).
   **LVGL config:** `-DLV_CONF_INCLUDE_SIMPLE -I${shared.dir}/include` — the `-I` is required, otherwise the LVGL library compiles without `lv_conf.h` (symptom: `undefined reference to lv_gif_create`).
-- **Classic ESP32** projects (bridge, ELMulator): `espressif32@6.10.0` (core 2.0.17), board `esp32dev`, `huge_app.csv`.
+- (Classic ESP32 projects — the 2024 BT-Classic→WiFi bridge and ELMulator — were removed 2026-10-23; they used `espressif32@6.10.0`, board `esp32dev`. In git history.)
 - **New JC3636W518 project:** follow `shared/README.md` (3-line platformio.ini + `#include "jc3636w518.h"`).
 - Editing files with scripts: keep each file's line endings (most are LF, some `main.cpp` are CRLF) — Python `open(..., newline="")`.
 - When converting `.ino` → `main.cpp`: add `#include <Arduino.h>` and prototypes for functions used before their definition; don't `#include` `.c` files that are also in `src/`.
@@ -80,7 +80,7 @@ Display color format is `RGB565_SWAPPED` (ST77916 byte order, set in `lv_conf.h`
 | `2-Program Example/Demo_Arduino` | **Vendor only:** `library/` (3 libs), `lv_conf.h` (vendor original), `sd/` (SD listing example; its lv_conf.h has FATFS edits), `docs/` (setup screenshots + compile instructions). The vendor's original LVGL demo sketch no longer exists unmodified. |
 | `shared` | **Shared code for all JC3636W518 projects:** `jc3636w518.ini` (PlatformIO base config), `include/lv_conf.h` (LVGL 9.6), `lib/JC3636W518` (board library). See its `README.md` |
 | `11-BLE-Scanner` | **BLE scanner with on-screen UI** (NimBLE-Arduino 2.5.1): live device list, tap to list services/characteristics, ELM327 test (ATZ/ATE0/ATI/ATRV/0100). Results saved to LittleFS `/ble_log.txt`; serial `d` dump, `c` clear, `s` device list. See its `README.md` |
-| `10-OBD-Display-2024` | **Earlier OBD speed-display project**, split into separate sketches — see its `README.md`: `display_speed_wifi`, `display_gif_sd`, `display_gif_embedded`, `elm327_wifi_bridge` (classic ESP32), `elmulator`, `assets/gifs`, `_archive/lvgl9_broken` |
+| `10-OBD-Display-2024` | **Leftovers of the 2024 OBD project:** `display_gif_embedded`, `display_gif_sd`, `assets/gifs`, `_archive/lvgl9_broken` (bridge/ELMulator/WiFi speed sketch removed 2026-10-23) |
 | `3-Specification` | Spec sheet (factory firmware features, interface photo) |
 | `4-Chip manual` | ESP32-S3R8 datasheet, PCM5100A datasheet |
 | `5-Dimension` | Mechanical drawings (JPG + DWG) |
@@ -113,11 +113,11 @@ AliExpress "ELM327 Mini V2.1 Bluetooth OBD **Dual Mode** 5.1" — dual mode = Bl
 - **LVGL 9.6.0 port** (`display_gif_embedded`, 2026-10-23): **23.4 fps** (= the GIF's own 23.7 fps; decode ~12 ms, refresh ~24 ms) vs 20.6 fps tuned LVGL 8.3. LVGL 9.6 replaced gifdec with bitbank2 AnimatedGIF (2× faster decode, correct transparency — no local patch needed).
   Port notes: `lib_deps = lvgl/lvgl@9.6.0` (takes priority over the vendor lvgl 8 in `lib_extra_dirs`); `lv_conf.h` generated from the 9.6 template (CLIB malloc, refresh 15 ms, GIF on, examples off); in 9.6 public headers live in `include/lvgl/` and `LV_COLOR_DEPTH` is deprecated → `LV_COLOR_FORMAT_DEFAULT` (RGB565); no LV_COLOR_16_SWAP → `lv_draw_rgb565_swap()` in the flush cb; no LV_TICK_CUSTOM → `lv_tick_set_cb(millis)`; no `monitor_cb` → display events `LV_EVENT_REFR_START/RENDER_START/REFR_READY`; images are `lv_image_dsc_t` with `LV_IMAGE_HEADER_MAGIC`. `lv_gif_set_color_format()` switches the GIF buffer format (used, see below).
 - **LVGL 9 tuning** (display_gif_embedded, CPU at full 23.8 fps): start 86 % → GIF in display color format 66 % → render `RGB565_SWAPPED` (no swap pass) 60 % → QSPI 80 MHz 55 % → IRAM for hot LVGL code 53 %. No effect: `LV_GIF_CACHE_DECODE_DATA` (not used anywhere in 9.6), 120-row buffers. AnimatedGIF "turbo" mode can't be used: it only outputs in COOKED draw mode, LVGL uses RAW.
-- **All JC3636W518 LVGL projects now use LVGL 9.6.0 + the shared library** (display_gif_embedded, display_gif_sd, display_speed_wifi). SD drive `A:` = `LV_USE_FS_STDIO` on `/sdcard/`.
+- **All JC3636W518 LVGL projects now use LVGL 9.6.0 + the shared library** (display_gif_embedded, display_gif_sd, 11-BLE-Scanner, 12-OBD-Speed). SD drive `A:` = `LV_USE_FS_STDIO` on `/sdcard/`.
 - 80 MHz QSPI and RGB565_SWAPPED rendering: **visual check by the user still pending** (colors / glitches).
 - Display is round: corners of the 360×360 framebuffer are not visible — design UI within a 360 px circle.
 - Compiling a 13.9 MB GIF into the firmware will not fit "Huge APP" (3 MB); large media should live on SD (or in a custom partition).
-- `display_gif_sd` / `display_speed_wifi` `setup()` return early if the SD card fails to mount (black screen); `display_gif_embedded` starts its GIF first.
+- `display_gif_sd` `setup()` returns early if the SD card fails to mount (black screen); `display_gif_embedded` starts its GIF first.
 - Draw buffer is in internal RAM; PSRAM is available for larger buffers / images.
 - **LittleFS** works on the `spiffs` partition of `huge_app.csv` (~900 KB); the first mount after flashing formats it (prints `Corrupted dir pair` / `mount failed (-84)` and some `task_wdt ... task not found` once — harmless).
 - BLE (NimBLE) in the user's home: ~12 devices visible within 10 s.