Smart Watchdog Health Framework

A Device Tree–enabled Linux watchdog driver with a user-space health monitoring daemon for OpenWrt-based embedded platforms.

Features

• Platform watchdog driver
• Linux watchdog framework
• Panic + automatic reboot
• Device Tree configuration
• User-space health daemon

Architecture

DTS → Kernel Watchdog → /dev/watchdog → Health Daemon → System Recovery

Build Steps

Add DTS overlay

cp dts/mt7981-smart-watchdog.dtso
target/linux/mediatek/files-5.15/arch/arm64/boot/dts/mediatek/

Build kernel

make target/linux/compile V=s

Build kmod

make package/kernel/kmod-smart-watchdog/compile V=s

Install on board

opkg install kmod-smart-watchdog*.ipk

Run daemon

gcc userspace/watchdog_healthd.c -o watchdog_healthd ./watchdog_healthd