Well, D0 (GPIO16) isn’t a great choice, see this:
And I’d probably power the relay with 5v rather than 3.3v, but if it’s working well on the bench and not when connected to the PC then it sounds very odd.
How are you powering the NodeMCU?
Pete.
Well, D0 (GPIO16) isn’t a great choice, see this:
And I’d probably power the relay with 5v rather than 3.3v, but if it’s working well on the bench and not when connected to the PC then it sounds very odd.
How are you powering the NodeMCU?
Pete.