Clockuino

Simple RTC clock built using Arduino Uno, a DS3231M RTC module and a PCF8574T LCD module.

Wiring

Wiring is pretty straightforward:

VCC -> 5V

GND -> GND

SCL -> A5

SDA -> A4

Requirements

• https://github.com/SV-Zanshin/DS3231M
• https://github.com/johnrickman/LiquidCrystal_I2C

Install them using the Library Manager in the Arduino IDE.

Usage

The software accepts two commands: RESET - resets the date/time to the compile date/time SET YYYY-MM-DD HH:MM:SS - sets the date/time to the specified value e.g. SET 2020-01-22 14:53:12