Adafruit MCP23017 I2C GPIO Expander by Liz Clark published March 23, 2022, last edited January 22, 2025 posted in Adafruit Products CircuitPython Breakout Boards Programming/ MicroPython / CircuitPython STEMMA Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Download Overview Pinouts Python & CircuitPython Python Docs Arduino Arduino Docs Downloads Single page Feedback? Corrections? Primary Products Adafruit MCP23017 I2C GPIO Expander Breakout $5.95 Add to Cart Featured Products view all Adafruit MCP23017 I2C GPIO Expander Breakout $5.95 Add to Cart STEMMA QT / Qwiic JST SH 4-Pin Cable - 50mm Long $0.95 Add to Cart STEMMA QT / Qwiic JST SH 4-Pin Cable - 200mm Long $1.25 Add to Cart STEMMA QT / Qwiic JST SH 4-pin to Premium Male Headers Cable Out of Stock STEMMA QT / Qwiic JST SH 4-pin Cable with Premium Female Sockets $0.95 Add to Cart JST SH 4-pin Cable with Alligator Clips - STEMMA QT / Qwiic $2.95 Add to Cart 15 Beginner Product guide Arduino Docs Page last edited March 17, 2022 Text editor powered by tinymce. Arduino Downloads