RGB Matrix Adapter Board (E)

I. Product Overview

The RGB Matrix Adapter Board (E) is designed based on the ESP32-S3-DevKitC-1 and ESP32-DevKitC V4 development boards. It is specifically built for efficient data transmission and stable power management. This board is suitable for displaying text, graphics, animations, and more, helping users quickly bring various creative designs to life.

The adapter board integrates multiple key interfaces, providing both reliable power supply and stable data transmission.

II. Product Features

· Compatible with ESP32-DevKitC and ESP32-S3-DevKitC-1

· Onboard two VH-4P (3.96 mm pitch) power connectors and HUB75 interface for RGB LED matrix panels

· Dual power input ports: USB Type-C 5V/4A or DC-044 5V/8A

· Gold-plated edge design for enhanced durability and aesthetics

III. Product Specifications

Item	Specification
Dimensions	70 mm (Length) × 60 mm (Width)
Power Input Connectors	USB Type-C: 5V / 4A; DC-044: 5V / 8A
Power Output Connectors	Two VH-4P (3.96 mm pitch) connectors, 5V / 4A each
RGB LED Matrix Panel Interface	HUB75
Data Interfaces	ESP32-S3-DevKitC-1 connectors, ESP32-DevKitC connectors

IV. Product Usage

4.1 Module Resource Profile

① USB connector (5V power input only)

② Power indicator LED

③ DC-044 5V power input connector

④ HUB75 connector

⑤ Two VH-4P connectors for RGB LED matrix panel power supply

⑥ M2.5 mounting holes

⑦ ESP32-S3-DevKitC-1 connector

⑧ ESP32-DevKitC connector

4.1.1 Wiring Diagram with ESP32-S3-DevKitC-1

Pin mapping for version V1.x

Mark	Description	Pin	Mark	Description	Pin
R1	R higher bit data	IO37	G1	G higher bit data	IO06
B1	B higher bit data	IO36	GND	Ground	GND
R2	R lower bit data	IO35	G2	G lower bit data	IO05
B2	B lower bit data	IO0	E	E line selection	IO04
A	A line selection	IO45	B	B line selection	IO01
C	C line selection	IO48	D	D line selection	IO02
CLK	Clock input	IO47	LAT	Latch pin	IO38
OE	Output enable	IO21	GND	Ground	GND

Pin mapping for version V2.x

Mark	Description	Pin	Mark	Description	Pin
R1	R higher bit data	IO18	G1	G higher bit data	IO8
B1	B higher bit data	IO17	GND	Ground	GND
R2	R lower bit data	IO16	G2	G lower bit data	IO1
B2	B lower bit data	IO15	E	E line selection	IO2
A	A line selection	IO7	B	B line selection	IO48
C	C line selection	IO6	D	D line selection	IO47
CLK	Clock input	IO5	LAT	Latch pin	IO21
OE	Output enable	IO4	GND	Ground	GND

4.1.2 Wiring Diagram with ESP32-DevKitC V4

Pin mapping for version V1.x

Mark	Description	Pin	Mark	Description	Pin
R1	R higher bit data	IO18	G1	G higher bit data	IO25
B1	B higher bit data	IO05	GND	Ground	GND
R2	R lower bit data	IO17	G2	G lower bit data	IO33
B2	B lower bit data	IO16	E	E line selection	IO32
A	A line selection	IO04	B	B line selection	IO3
C	C line selection	IO0	D	D line selection	IO21
CLK	Clock input	IO02	LAT	Latch pin	IO19
OE	Output enable	IO15	GND	Ground	GND

Pin mapping for version V2.x

Mark	Description	Pin	Mark	Description	Pin
R1	R higher bit data	IO18	G1	G higher bit data	IO17
B1	B higher bit data	IO19	GND	Ground	GND
R2	R lower bit data	IO21	G2	G lower bit data	IO23
B2	B lower bit data	IO27	E	E line selection	IO22
A	A line selection	IO26	B	B line selection	IO16
C	C line selection	IO25	D	D line selection	IO4
CLK	Clock input	IO33	LAT	Latch pin	Default IO2
OE	Output enable	IO32	GND	Ground	GND

4.2 Notes

· Before powering on, check the power supply to prevent reverse polarity. Do not plug or unplug while powered.

· Do not touch core components directly with bare hands during operation.

· Always take proper ESD (Electrostatic Discharge) protection measures.

· ESP32-HUB75-MatrixPanel-I2S-DMA Library: A library specifically designed for driving HUB75 interface LED matrix panels. It encapsulates complex low-level driving logic, and you need to download this library in Arduino.

· You can install the library files by following these steps:

Download and unzip the Library file. After unzipping, copy it to the Library directory of Arduino. For example, in my case, the directory is shown in the image below. Copy the downloaded ESP32-HUB75-MatrixPanel-I2S-DMA library to this directory.