Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3348
| Posted: 08:04am 28 Sep 2022 |
Try another pin, perhaps that one has become faulty during testing.
Here is what I get.
> setpin 20,dout <---2.4mV
> pin(20)=1 <---3.3v
> setpin 20,din <---315mV of random noise.
>
Edit.
Are you certain the diode is cathode to +?
Edited 2022-09-28 18:09 by phil99