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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
That code should work
Yes, at least twice - I'd generally go for ~5 times the interval, just in case.
One thing to note is that once you added the watchdog you can't change it or its interval until the device physically reboots (
reset()won't cut it). It's done in hardware as a failsafe so once it's been added, it can't be undone (until a reboot/power cycle)