https://www.adafruit.com/product/5346
Adafruit MCP23017 I2C GPIO Expander Breakout [STEMMA QT / Qwiic] : Adafruit Industries, Unique &...
We’ve gotten a lot of requests for a MCP23017 breakout and we’ve always sorta been like “ehh why not just use the DIP chip?” but with STEMMA QT we could see...
stemma qtadafruitmcp23017i2cgpio
https://www.adafruit.com/product/732
MCP23017 - i2c 16 input/output port expander : Adafruit Industries, Unique & fun DIY electronics...
Add another 16 pins to your microcontroller using an MCP23017 port expander. The MCP23017 uses two i2c pins (these can be shared with other i2c devices), and...
mcp23017i2cinputoutputport