On Fri, 28 Feb 2020 11:39:05 GMT, Jan Panteltje 
declaimed the following:


>The GPIO as _digital_ input sees a 'logic zero' below some voltage and a
'logic one' above  some voltage.
>Th exact voltage can vary,  also  depends on temperature and production 
spread,
>but is somewhere between 0 and 3.3 V
>

 Presuming common CMOS thresholds of 30 and 70%: 2.31V
is HIGH. What the circuit does between those thresholds is indeterminate
(I'd hope it holds the last valid state until the far threshold is
crossed).


--
 Wulfraed                 Dennis Lee Bieber         AF6VN
 wlfraed@ix.netcom.com    http://wlfraed.microdiversity.freeddns.org/

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