kopia lustrzana https://github.com/micropython/micropython
44 wiersze
1.3 KiB
ReStructuredText
Executable File
44 wiersze
1.3 KiB
ReStructuredText
Executable File
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.. _esp32_wdt:
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WDT
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===
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When the WDT timeout is short, a problem occurs when updating the software:
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you don't have enough time to copy the updates to the device.
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ESP32 allows reinitialise the watchdog with a longer timeout - like an hour.
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More comprehansive example usage::
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# Save as 'main.py' and it will run automatically after 'boot.py'
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import sys
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from time import sleep
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from machine import WDT, reset
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try:
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print('Press Ctrl-C to break the program.')
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sleep(5)
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print('Enable the WDT with a timeout of 5s.')
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wdt = WDT(timeout=5000)
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seconds = 1
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while True: # infinite work loop
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print('Do something useful in less than 5 seconds.')
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print(f'Sleep {seconds} seconds.')
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if seconds >= 5:
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print(f'WDT will reboot the board.')
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sleep(seconds)
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seconds += 1
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wdt.feed()
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# 1/0 # uncomment this line to raise an runtime exception, then WDT reboot
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# sys.exit() # uncomment this line for planned program exit
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except SystemExit:
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wdt = WDT(timeout=1000 * 60 * 60) # 1 hour before WDT reboot
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print('Now you have 1 hour to update program on the board.')
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print('When ready, type reset() on the REPL/WebREPL command line to reboot.')
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