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I²C stands for Inter-Integrated circuit, and is a data transferation system that allows connections between computers or microcontrollers and low-level peripherals (e.g. sensors or EEPROMS). It is a multi-master, multi-slave, single-ended, serial computer bus.

2 votes

2004-LCD with PCF8574-I2C and wiringPi (Python)

I have exactly the same problem. I did some research and found out the following code works. I don't know why it works but it just works. Add the following to the beginning of your script: port=1 # …
Timothy Wong's user avatar