Looking for an RTC Module for your next Raspberry Pi project? The RTC WatchDog HAT for Raspberry Pi from Waveshare is exactly what you are looking for. This HAT incorporates a highly accurate I2C real-time clock (RTC) that features a DS3231SN high precision RTC chip, and a backup battery holder to ensure accurate timing in the event of power-losss. A standard 40-pin header layout for the Raspberry Pi and Raspberry Pi Zero makes for easy integration, and is compatible with extended header-pins to enable HAT stacking.
Online development resources are available, which include wiring guidance and example code, with additional information being found on the Product Wiki & Manual.
Note: The Raspberry Pi is NOT included
Features
- MAX705 monitoring circuit with auto reset function
- Incorporates DS3231SN high precision RTC chip with backup battery holder
- Reset pin selection for swiching watchdog
- Indicator for watchdog output warning
Whats On Board

- USB Type-C power input
- MAX705 watchdog
- Watchdog output enable
- 1: Enabled
- 0: Disabled
- CR1220 RTC battery holder
- RTC power supply, supports CR1220 button cell
- Watchdog output warning
- lights up if the watchdog is overflow
- Raspberry Pi 40PIN GPIO header
- RTC chip
- DS3231 high precision RTC chip
- Watchdog reset pin selection
- Control interface
- For use with other host boards
Connection Examples

Resources
- Product Wiki & Manual
Pinout

Package Contents
- 1x – RTC WatchDog HAT
- 1x – 20-PIN female header
- 1x – Standoffs pack



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