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- .. currentmodule:: machine
- .. _machine.WDT:
- 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.
- Example usage::
- from machine import WDT
- wdt = WDT(timeout=2000) # enable it with a timeout of 2s
- wdt.feed()
- Availability of this class: pyboard, WiPy.
- Constructors
- ------------
- .. class:: WDT(id=0, timeout=5000)
- Create a WDT object and start it. The timeout must be given in seconds and
- the minimum value that is accepted is 1 second. Once it is running the timeout
- cannot be changed and the WDT cannot be stopped either.
- Methods
- -------
- .. method:: wdt.feed()
- Feed the WDT to prevent it from resetting the system. The application
- should place this call in a sensible place ensuring that the WDT is
- only fed after verifying that everything is functioning correctly.
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