Keyestudio ESP32 - Project 10：Dot Matrix Display; 1. Description; 2. Wiring Diagram

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ESP32 Starter Kit

9.2.13 Project 10Dot Matrix Display

1. Description

This module consists of a 8x8 LED dot matrix with one control pin for each row as well as each column to adjust

the brightness of LED. Connecting with Arduino board, the brightness of LED is controlled to display characters and

ﬁgures via Arduino programming. In this way, simple characters, numbers and ﬁgures are able to be displayed. It also

can be applied in game machines or screens.

MAX7219 is an IC with SPI communication and can be used to control the 8x8 dot matrix. The MAX7219 SPI

communication has integrated in our libraries and you can recall directly.

212 Chapter 9. Scratch Tutorial