Display a character on the MAX7219 display with ESP32

Purpose of this tutorial:

In this tutorial we will see how to display the number 4 on the MAX7219 display with the ESP32 card.

Necessary components

• ESP32
• MAX7219 display

• Test plate

• Connecting wires

Mounting

To perform the assembly, we connect:

• the VCC pin of the display to the 3.3V pin of the ESP32

• the GND pin of the display to the GND pin of the ESP32

• pin CS of the display to pin P5 of the ESP32

• the DIN pin of the display to pin D2 of the ESP32

• the CLK pin of the display to pin D4 of the ESP32

Micropython program

Here is the program which displays the number 4 on the MAX7219 display.

Note: it import the library max7219.py.