Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3321
| Posted: 07:15am 04 Jan 2023 |
Tested 2 Picos freshly flashed with the latest 5.07.06RC1.
GP0 to GP5 all just a few mV.
Could the 3V3 be leakage on the breadboard? Measure that position with the Pico removed.
Or try with the Pico in a different place on the breadboard.