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The Waveshare MCP23017 IO Expansion Board is a versatile I2C interface that expands 2 signal pins into 16 I/O pins, allowing for the connection of up to 8 boards for a total of 128 I/O pins. It supports both 3.3V and 5V levels, features a user-friendly design with multiple connector options, and comes with extensive development resources for popular platforms like Raspberry Pi, Arduino, and STM32.


| Brand | Waveshare |
| Package Dimensions | 9.1 x 5.2 x 2.1 cm; 20 g |
| Item model number | MCP23017 IO Expansion Board |
| Manufacturer | Waveshare |
| Wireless Type | Infrared |
| Power Source | DC |
| Operating System | Raspberry Pi OS |
| Are Batteries Included | No |
| Item Weight | 20 g |
| Guaranteed software updates until | unknown |
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