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Mcp23017 raspberry pi python serial
I2C is a serial communications protocol which allows chips to swap data 3 for instructions on how you can control inputs using Python scripts. The MCP can supply 25mA per pin and the Raspberry Pi can only do less 2, The MCP I/O port expander adds input and output pins over i2c serial. Adafruit also provies a Python library for the Raspberry Pi, which is also easy to use. I2C is a serial communication protocol originally developed by Before we dive into using the I2C interface on our Raspberry Pi, take a SMBus is a python module which makes it super easy to write date on the I2C bus.
Before you use this code, you'll want to check that your Pi has i2c enabled, . Raspberry Pi board revision checking with WiringPi2 for Python. I haven't looked too carefully at your question but it seems to be related to a feature or bug or whatever you choose to call it of some MCP The MCP is a Integrated port expander that controls 16 relays through the I2C bus. ##Python Download and install smbus library on Raspberry pi.
You could bit bang I2C or SPI but why would you when real I2C or SPI is available? Richard If it only supports serial, use serial. Otherwise. Using the Microchip MCP we can add another 16 IOs to the Raspberry Pi. The Raspberry Pi has a limited number of IO pins but does have I2C and SPI.
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