RGB64x32MatrixPanel

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:

• https://github.com/costyn/instapanel/blob/master/platformio.ini