pcf8574-io 0.1.0

PCF8574 driver to set pin mode, read and write digital signal 3.3v

Python driver for PCF8574 8bit IO Expander board Developed for the Raspberry Pi, requires the python-smbus2 package to access the I2C bus.

Tested on raspberry pi 3b plus with two PCF8574 boards.

First install smbus2 using: pip install smbus2

Usage Example:

import pcf8574_io

# You can use up to 8 PCF8574 boards # the board will start in input mode # the pins are HIGH in input mode p1 = pcf8574_io.PCF(0x20)

# You can use multiple boards with different addresses #p2 = pcf8574_io.PCF(0x21)

# p0 to p7 are the pins name # INPUT or OUTPUT is the mode p1.pin_mode(“p0”, “INPUT”) print(p1.read(“p0”))

# You can write and read the output pins # use HIGH or LOW to set the pin, HIGH is +3.3v LOW is 0v p1.pin_mode(“p7”, “OUTPUT”) p1.write(“p7”, “LOW”) print(p1.read(“p7”))

# Additional you can do the following p1.set_i2cBus(1) p1.get_i2cBus() print(p1.get_pin_mode(“p7”)) # returns string OUTPUT, INPUT print(p1.is_pin_output(“p7”)) # returns boolean True, False print(p1.get_all_mode()) # returns list of all pins [“OUTPUT”,”INPUT”,…etc]

/n/nhttps://github.com/ahmed9378/pcf8574_io