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---
description: "Me documenting my 64x64 LED matrix display"
created: 2025-03-11
---
## Display documentation
### From Aliexpress seller
[64x64 Indoor RGB HD P3 Led Module Video Wall High Quality P2.5 P4 P5 P6 P7.62 P8 P10 Panel Full Color Display - Aliexpress.com](https://www.aliexpress.com/item/32757647402.html)
Key | Value
------------------------- | -----------------------------------
Item | P3
Chip | Epstar
Chip size | Red 9 mil, Green 12. Blue 12mil
Light type | SMD2121
Pixel Pitch | 3mm
Module Size | 192mmX192mm
Module Resolution | 64 X 64 (dots)
Density of pixel | 111111dots/m2
Pixel configuration | 1R1G1B
Red wavelength | 625±2nm
Green wavelength | 525±2nm
Blue wavelength | 470±2nm
Colors | 16777216
Best viewing distance | ≥2m
viewing angle | 120°/90°
Maximum power consumption | 20W
Brightness | 1500cd/m2
Gray scale | 14bits per color
Color temperature | 6500k
Control method | Synchronization or Asynchronization
Driving method | 1/32 scanning
Frame frequency | 60Hz
Refresh frequency | ≥600Hz
Working Voltage | DC5V
IP grade | IP54
MTBF | More than 8000hours
Life Span | 80,000hours
### Chips
1. CHIPONE `ICN74HC245TS` `A14276CA`
2. `MBI5124GP` `A3YN72CTHB`
3. `RUC7258` `8W913170`
### Display IN connector
---
## Micro controller wiring
I use an [ESP32 WEMOS LOLIN S2 Mini](https://docs.platformio.org/en/latest/boards/espressif32/lolin_s2_mini.html)
which has an ESP32-S2F chip on it
Display in wiring
```
┌────────┐
R1 ┤ 1 40 ├ G1
B1 ┤ 2 38 ├ N
R2 ┤ 4 36 ├ G2
B2 ┤ 6 34 ├ LE
LA ┤ 8 21 ├ LB
LC ┤ 10 17 ├ LD
CLK ┤ 13 15 ├ LAT
OE ┤ 14 ⏚ ├ GND
└────────┘
```
---
## PCB Connector board
The screen glitches unless you have a solid connection.
This PCB is a straight connection, except the gnd which is flipped with the adjacent pin.
Half the display glitched out, untill i added a 100pf capacitor between `lat pin` and `gnd`
as per:
<https://github.com/mrcodetastic/ESP32-HUB75-MatrixPanel-DMA/issues/130#issuecomment-867116753>
---
## Software
<https://github.com/mrcodetastic/ESP32-HUB75-MatrixPanel-DMA>
```c++
#define R1_PIN 1
#define G1_PIN 40
#define B1_PIN 2
#define R2_PIN 4
#define G2_PIN 36
#define B2_PIN 6
#define A_PIN 8
#define B_PIN 21
#define C_PIN 10
#define D_PIN 17
#define E_PIN 34 // required for 1/32 scan panels, like 64x64px. Any available pin would do, i.e. IO32
#define LAT_PIN 15
#define OE_PIN 14
#define CLK_PIN 13
HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};
HUB75_I2S_CFG mxconfig(
64, // Module width
64, // Module height
1, // chain length
_pins, // pin mapping
);
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
```
---
I'm still experiencing some glitching, especially on the lower half of the display,
albeit a better PSU made the problem go away for static sketches, plasma still struggles.
|
