Micropython MAX7219 8 digit chain

A micropython lib for MAX7219 8 digit chain, uses SPI interface.

This code has been passed the test of ESP32 board, if you use ESP8266 or pyb, please change the ss pin as your expected.

This lib is modified from other max7219 8digit as below link, thanks for the original contributer.

https://github.com/pdwerryhouse/max7219_8digit.git

ESP32 example

Display a increasing number in 2 digit module

from machine import SPI, Pin
from max7219_8digit_chain import *
import time

spi = SPI(1, sck=Pin(14), mosi=Pin(13))
ss = Pin(4, Pin.OUT)
ss.value(1)

display = Display(spi, ss, 1, 2)
counter = 0
while True:
    counter += 1
    time.sleep(0.01)
    display.write_to_buffer(str(counter))
    display.write_to_chip()

Change intensity of module

display.brightness(3)

Demo image

Update schedule

In current code, if the string is '1.2345', the dot will use one digit instead of following above digit, this is not expected behavior.