pi-watchdog

Node wrapper for Raspberry Pi BCM2835 Watchdog.

Getting Started

1. Install the Raspberry Pi's watchdog driver

   sudo modprobe bcm2708_wdog
   sudo nano /etc/modules (add "bcm2708_wdog")

2. (Optional) Change permissions of /dev/watchdog

   sudo nano /etc/udev/rules.d/60-watchdog.rules 
   
   KERNEL=="watchdog", MODE="0666"

3. Install pi-watchdog

   npm install pi-watchdog

4. Try the example

   node node_modules/pi-watchdog/example.js

Example

var piWatchdog = require('pi-watchdog')();

piWatchdog.getTimeout(function(err, timeout) {
  console.log(timeout);
});

// enables the watchdog
piWatchdog.setTimeout(function(err, newTimeout) {
  console.log(newTimeout);
});

// send heartbeats
setInterval(sendHeartbeat, 5000);

function sendHeartbeat() {
  piWatchdog.heartbeat(function(err) {
    if(err) {
      console.log('heartbeat error', err);
    }
  });
}

// disable the watchdog
piWatchdog.disable(function(err) {
  if(err) {
    console.log('heartbeat error', err);
  }
});

References

• http://binerry.de/post/28263824530/raspberry-pi-watchdog-timer
• https://github.com/binerry/RaspberryPi/blob/master/snippets/c/watchdog/wdt_test.c