CircuitPython version

CircuitPython 9.2.0-beta.0 on 2024-09-17; Raspberry Pi Pico 2 with rp2350a
CircuitPython 9.2.0-beta.0-15-gca25c602a8 on 2024-09-27; Raspberry Pi Pico 2 with rp2350a
CircuitPython 9.2.0-beta.0-16-gec5cca6983 on 2024-09-27; Raspberry Pi Pico 2 with rp2350a

Code/REPL

import rotaryio
import board

encoder = rotaryio.IncrementalEncoder(board.GP15, board.GP14)
last_position = None
while True:
    position = encoder.position
    if last_position is None or position != last_position:
        print(position)
    last_position = position

Behavior

Terminal returns 0 value once and doesn't increment another during encoder rotation.

Description

I tested this code on 3 different Circuitpyton versions of v9.2.0-beta.0 on RP2350 with the same result. I also checked voltages on Pico2 inputs by oscilloscope and HIGH/LOW states seems to look fine.

This code run on RP2040 with CircuitPython 9.2.0-beta.0 works correctly.

A bug shouldn't be related to RP2350 Errata E9 issue, because rotaryio use pull-ups on inputs.

Additional information

No response