PCF8574 library. i2c digital expander for Arduino, Raspberry Pi Pico and rp2040 boards, esp32, SMT32 and ESP8266. Can read write digital values with only 2 wire. Very simple to use and encoder support.
Hi, I think you use a code that monitors the begin status.
In some MCUs, the beginning status isn't managed by wire, so you can receive that message.
Bye Renzo
The buttons can be read, but I get the "Couldn't initialize" message. What is wrong?