- Sat Jul 08, 2017 8:36 am
#68074
Overall principle looks good. I'd maybe worry a bit about active high on GPIO16 turning on transistor creating a bit of a race condition at start up. Could that be moved to another column, or why can't it be used as the hold.
- Sat Jul 08, 2017 8:42 am
#68076
OK. I assumed GPIO16 would be configured as input at reset, hence tri-state. If I'm wrong, please let me know, and I'll swap some IO.
- Sat Jul 08, 2017 9:18 am
#68078
The only pins I know to be tristate at reset are GPIO 4 and 5. All the rest have pullups/pull down. See https://www.mjt.me.uk/posts/esp8266-gpi ... and-reset/
- Sat Jul 08, 2017 1:07 pm
#68083
GPIO16 is driven high as soon as reset is asserted so I think that is a good choice for the power hold. You could use GPIO15 for the transistor column as this needs a pull down anyway for the boot process.
