01-31-2025, 05:50 PM
(01-31-2025, 07:42 AM)admin Wrote: because you have not define the i2c bus SDA and SCL pin for ESP32.
these instructions are supposed to be for that. i got it from the Di and DO example on the forum.
PCF8574 pcf8574_1 (0x22, 4, 5) and
PCF8574 pcf8574_2(0x21, 4, 5) is for inputs. right?
is that what you mean?