PM Standard - HW Watchdog issue...


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Volhout
Guru

Joined: 05/03/2018
Location: Netherlands
Posts: 5879
Posted: 10:03am 08 Oct 2025      

Grogster,

You are designing a MM2 in WS-Zero footprint to have a drop in replacement for the WS-Zero in your application ? Just for the watchdog issue ? Or also because of the lower power supply current of the MM2 ?

- for the power supply current nothing can be done. pico needs more power.

- for the watchdog problem on pico (assuming Peter creates ON ERROR RESTART or ON ERROR GOTO) the recipe is

OPTION AUTORUN,NORESET

combined with in your program

ON ERROR RESTART
WATCHDOG HW 8000

That should settle it, right ?

Volhout

P.S. I actually like the ON ERROR GOTO more, since it also gives you the opportunity to repair the error in a less intrusive way, like RUN... without breaking the USB
connection.

P.P.S. 555 circuit need minimal 4.5V. Not sure they work at 3.3V. That is why the applications show Arduino (5V) solutions. This may (if you can get an old CD4060, although I think R1 needs to be 1k).



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Edited 2025-10-08 20:39 by Volhout