Nodemcu-based NTP clock, displaying hours with a Max7219 LED matrix
| nodemcu-max7219-clock.ino | ||
| README.md | ||
Nodemcu NTP clock with Max7219 LED matrix
Hardware parts
Pinout
Pinout:
- Connect 3V to VCC
- Connect G to GND
- Connect D5 to DIN
- Connect D6 to CS
- Connect D7 to CLK
Note: it's all sequential
Software dependencies
This uses the Arduino IDE with the esp8266 core and the following libraries, installed using the Libraries manager:
- ezTime 0.8.3, to get time from NTP pool, properly format it and take in account timezones
- MajicDesigns's MD_MAX72XX library 3.2.1, to write hours on the Max7219 LED matrix (this builds mostly upon the MD_MAX72xx_PrintText sample)