Today in this tutorial we will learn importance of watchdog timer and configuring watchdog timer in Arduino.

What is Watchdog Timer ?

A watchdog timer (WDT) is a hardware timer that automatically generates a system reset if the main program neglects to periodically service(reset) it. The Watchdog Timer is clocked from a separate On-chip Oscillator which runs at 1 MHz. This is the typical value at V CC = 5V. It is often used to automatically reset an Arduino that hangs because of a software or hardware fault. Some systems may also refer to it as a computer operating properly (COP) timer. All Arduino boards have watchdog timer hardware. Continue reading Tutorial On Arduino Watchdog Timer Setup →