RGB64x32MatrixPanel
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RGB64x32MatrixPanel on ESP32
For a friend I'm making a RGB LED panel, and need to pull some social media numbers and display them on the panel.
For this I wanted an ESP32 so it could do HTTP REST calls over wifi. I came across this library for efficiently talking to HUB75 RGB panels on an ESP32:
https://github.com/mrfaptastic/ESP32-RGB64x32MatrixPanel-I2S-DMA
Parts List
- https://www.tinytronics.nl/shop/en/platforms/ttgo/lilygo-ttgo-t7-mini32-v1.4-esp32-wrover Cheap Wemos clone
- https://www.tinytronics.nl/shop/en/power-supplies/5v/mean-well-power-supply-5v-7a-switching-power-supply-lrs-35-5
- https://www.tinytronics.nl/shop/en/lighting/led-matrix/64x32-rgb-led-matrix-320x160-mm (comes with IDC data cable and powercable)
- https://www.tinytronics.nl/shop/en/connectors/pin-header/16-pins-header-connector-2x8p
- https://www.tinytronics.nl/shop/en/components/resistor/10k%CF%89-potmeter-type-rv09 (adjusting brightness)
- https://www.tinytronics.nl/shop/en/audio/knobs/potmeter-knob-black-orange-flat
MCU Pin Issues
The MCU has several pins with limited functionality or they are not connected. The wiring guide suggests using pins 16/17 for example, but on WROVER they aren't connected.
The final mapping I used is:
IO2 G2 IO4 LAT IO5 C IO18 CLK IO19 B IO21 B2 IO22 OE IO23 A IO25 R1 IO26 G1 IO27 B1 IO32 R2 IO33 D
Platformio.ini
The LilyGo TT T7 isn't in Platformio yet, but using a T1 works too: