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ADAFURIST-MCP23008-Bibliothek
2021-06-26
Arduino -Bibliothek für den MCP23008 (und '9) I2C I/O Expander
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ARCHIVED !!!
This library has been archived. Please use the replacement library: https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library
Adafruit MCP23008 Library 
To download, click "Download Source" in the top right corner. Then install as indicated in our tutorial: --> http://www.ladyada.net/library/arduino/libraries.html in a folder called Adafruit_MCP23008.
You will also need the Adafruit BusIO library: https://github.com/adafruit/Adafruit_BusIO
This is very much beta, it seems to work fine but its not optimized and doesn't currently suport the interrupt capability of the chip
Currently it can do: setting pin directions, inputs and outputs and turning on/off the pull-up resistors
To use: Connect pin #1 of the expander to Analog 5 (i2c clock) Connect pin #2 of the expander to Analog 4 (i2c data) Connect pins #3, 4 and 5 of the expander to ground (address selection) Connect pin #6 and 18 of the expander to 5V (power and reset disable) Connect pin #9 of the expander to ground (common ground) Pins 10 thru 17 are your input/output pins
Check the datasheet for more info: http://ww1.microchip.com/downloads/en/DeviceDoc/21919b.pdf
Enjoy and send pull requests!
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Reviews
4
(1)
user_76tNb5yr
2025-04-17
I have been using the Adafruit-MCP23008-library for several of my projects and it works flawlessly. The library is well-documented and easy to integrate, making it ideal for expanding the GPIO capabilities of a microcontroller. Thanks to Adafruit for creating such a reliable and efficient library! Highly recommended for anyone looking to extend their I/O options.