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In February 2018, I ran my sketch (arduino IDE) in my project - ESP32 digital voltmeter and it worked fine - Arduino IDE 1.8.5 and ESP32 Board version 1.0.0. The communication of the digital voltmeter ...
The PCF8574_LH library provides a simple interface for controlling the PCF8574 I/O expander using the I2C communication protocol. It allows you to read and write values to the PCF8574's registers, ...