class WDT – watchdog timer¶
The WDT is used to restart the system when the application crashes and ends up into a non recoverable state. Once started it cannot be stopped or reconfigured in any way. After enabling, the application must “feed” the watchdog periodically to prevent it from expiring and resetting the system.
from machine import WDT wdt = WDT(timeout=2000) # enable it with a timeout of 2s wdt.feed()
Availability of this class: pyboard, WiPy, esp8266, esp32.
Create a WDT object and start it. The timeout must be given in milliseconds. Once it is running the timeout cannot be changed and the WDT cannot be stopped either.
Notes: On the esp32 the minimum timeout is 1 second. On the esp8266 a timeout cannot be specified, it is determined by the underlying system.