DIGITAL RAIN CLOCK / ESP32 APPLICATION
Matrix Rain Tab5
Matrix Rain Clock for M5Stack Tab5 (ESP32-P4): 80-column digital rain on a 1280x720 MIPI-DSI panel, a 7-segment clock the rain refracts through, a touch WiFi setup wizard…
About this project
About this project
Eighty columns of glyphs fall down a 1280×720 MIPI-DSI panel, drawn straight to it in C++ without LVGL or any framework. The 7-segment clock is made of rectangles, and a glyph crossing a lit segment is pushed four pixels aside and hue-shifted, so the rain seems to bend; the glyph then leaves a ghost in an 80×45 glow buffer that fades over about eight and a half seconds. The only UI is a 90×34 SET corner, and tapping the screen cycles six character sets, with 91 katakana baked into 16×16 bitmaps. The real trap is the missing video memory, so DSI scan-out, CPU write-back and USB serial fight over PSRAM, and a frame taking over 3 s triggers a restart.
From the README
From the README
- Display
- 5" IPS, 1280×720 MIPI-DSI
- Input
- Tap SET (bottom-right corner, 90×34 px)
- Limit
- if a frame takes longer than 3 s, the firmware calls esp_restart()
- Build
- flash the release image with M5Burner (no toolchain)
Hardware
Native board: M5Stack Tab5
Boards: M5Stack Tab5 (ESP32-P4)
Supported hardware: M5Stack Tab5 (ESP32-P4). Confirm the exact board revision and pin map in the upstream repository.
What the source supports
Upstream evidence: Reviewed from public README media at commit 010b3191b2f3 under MIT. Firmware was not executed.
Media credit & rights
Upstream project media · rights remain with its owner · Credit: andjiang0083
Screenshots decoded from the upstream README at a pinned commit. Repository code and firmware were not executed; the license texts are included in the preview package.
View original source ↗ Copyright & removal · Reviewed
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