Soldered MCP23017 MicroPython Library


IO Expander MCP23017 Breakout (opens in a new tab)

This I2C GPIO expander adds 16 fully configurable digital I/O pins to a microcontroller using just two wires. Each pin can be set as input, output, or pull-up input, sinks/sources up to 25mA (enough to drive LEDs directly), and the board is 3.3V/5V tolerant. Up to eight boards can be chained via I2C address jumpers for 128 additional pins total. Includes a Qwiic connector for solder-free integration.

How to install

After installing the mpremote package (opens in a new tab), install the library on your board using the following command:

  mpremote mip install github:SolderedElectronics/Soldered-MCP23017-MicroPython-Library

Or, if you're running a Windows OS:

  python -m mpremote mip install github:SolderedElectronics/Soldered-MCP23017-MicroPython-Library

Repository Contents

mcp23017.py - MicroPython driver class (based on mcauser/micropython-mcp23017 (opens in a new tab), MIT licensed - see the file header for the original copyright notice; the rest of this repository is GPLv3 per Soldered's standard)
package.json - mip install manifest
/Examples - port config (lists and individual methods) and interrupt examples

Hardware design

You can find hardware design for this board in the IO expander MCP23017 breakout hardware repository.

Documentation

Access library documentation here (opens in a new tab).

About Soldered

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Check license details in the LICENSE file. Long story short, use these open-source files for any purpose you want to, as long as you apply the same open-source licence to it and disclose the original source. No warranty - all designs in this repository are distributed in the hope that they will be useful, but without any warranty. They are provided "AS IS", therefore without warranty of any kind, either expressed or implied. The entire quality and performance of what you do with the contents of this repository are your responsibility. In no event, Soldered (TAVU) will be liable for your damages, losses, including any general, special, incidental or consequential damage arising out of the use or inability to use the contents of this repository.

Have fun!

And thank you from your fellow makers at Soldered Electronics.