WDT | Watchdog Timer | Watchdog Timer working | Watchdog Operation

A watchdog timer (WDT) is a hardware or software timer that monitors a system (like a microcontroller) to ensure its program is running correctly; if the software freezes or malfunctions and fails to periodically "reset" or "kick the dog," the WDT times out and triggers a system reset, preventing indefinite hangs and enabling self-recovery in embedded or remote devices. It acts like an automatic "turn it off and on again" for unresponsive systems, crucial for reliability in unattended equipment. How it works Counter: A WDT uses an internal counter, often counting down from a set value. "Feeding the dog": The main software loop is designed to periodically reset this counter (e.g., by writing a specific value) before it reaches zero, indicating normal operation. Timeout: If the software hangs and fails to reset the counter within the set time, the WDT overflows and triggers a hardware reset or an interrupt, restarting the system. You’ll learn: ✅ What is a Watchdog Timer and how it works ✅ The internal operation and timing mechanism behind WDT ✅ How the Watchdog Timer resets the system during program failure ✅ Real-world examples of WDT usage in embedded systems and IoT devices ✅ Why the WDT is critical for system reliability and fault tolerance By the end of this video, you’ll clearly understand how the Watchdog Timer prevents system crashes and ensures stable, fail-safe operation in microcontroller-based systems. Chapters:- 00:00 Introduction 00:30 what is watchdog timer 01:30 what is the need of Watchdog timer 04:47 How watchdog timer works 08:04 How watchdog timer Resets Microcontroller 09:30 Advantages of watchdog timer If you have any questions please write to us email: [email protected] 🔔 Subscribe & Learn More If you found this video helpful, Like 👍, Comment 💬, and Subscribe 🔔 to our channel for more tutorials on Embedded Systems, Microcontrollers, and Embedded C Programming! ----------------------------------------------------------------------------------------------------------- Your Questions Watchdog timer in C Watchdog timer in Embedded System Watchdog timer in Microcontroller Watchdog timer in STM32 Watchdog timer in LPC2129 Watchdog timer in LPC2148 Watchdog timer in LPC1768 Watchdog timer explained What does a watchdog timer do? What is an example of a watchdog timer? What is the watchdog timer in RTOS? What is watchdog software used for? Watchdog timer Arduino Watchdog timer diagram Watchdog timer example Watchdog timer in 8051 Watchdog timer ESP32 ----------------------------------------------------------------------------------------------------------------------- #watchdog #watchdogtimer #embeddedsystems #systemreset #baremetalprogramming #KnowAboutEmbeddedSystems