Adafruit GPIO Expander Bonnet for Raspberry Pi by Liz Clark published March 06, 2019, last edited January 21, 2025 last major update November 02, 2023 posted in Adafruit Products Raspberry Pi CircuitPython Breakout Boards 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 Usage Python Docs Downloads Single page Feedback? Corrections? Primary Products Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C $9.95 Add to Cart Featured Products view all Adafruit GPIO Expander Bonnet - 16 Additional I/O over I2C $9.95 Add to Cart GPIO Ribbon Cable 2x8 IDC Cable - 16 pins 12" long $1.95 Add to Cart STEMMA QT / Qwiic JST SH 4-Pin Cable - 50mm Long Out of Stock STEMMA QT / Qwiic JST SH 4-pin to Premium Male Headers Cable $0.95 Add to Cart STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long $0.95 Add to Cart STEMMA QT / Qwiic JST SH 4-Pin Cable - 200mm Long Out of Stock 6 Beginner Product guide Downloads Files MCP23017 GPIO Expander Datasheet Adafruit GPIO Expander Bonnet EagleCAD files on GitHub Rev B Fritzing object in our Fritzing repo Rev C Fritzing object in our Fritzing repo Schematics and Fab Print Rev C dimensions are in inches Rev B Page last edited March 08, 2024 Text editor powered by tinymce. Python Usage