How to Connect an MCP23017 I O Port Expander to an Arduino The MCP23017 I O port expander circuit we will build with an Arduino microcontroller is shown below. In this circuit, the hardware connections are very simple. To each of the I O pins, we attach a 220Ω resistor and an LED. Raspberry Pi: Porterweiterung mit MCP23017 und I2C ... Hier möchte ich auf die Erweiterung der GPIO Leiste des Raspberry Pi mit Hilfe des Portexpanders "MCP23017" eingehen, sowie die Ansteuerung über I²C. i2c code samples C WiringPi: PCF8591, MCP23017, Arduino ... Open Search Input. Open Navigation. Search i2c code samples C WiringPi: PCF8591, MCP23017, Arduino ... Search. Quick Start Guide; Forum FAQ; About. About us; Contact us ... Logout; Register WiringPi mcp23017.h at master · WiringPi WiringPi · GitHub * wiringPi is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. I2C: MCP23008 & MCP23017 | Wiring Pi i2c: mcp23008 & mcp23017 WiringPi supports an extension module for the MCP23008 (8 bit) and MCP23017 (16 bit) I2C GPIO expansion chips. The Raspberry Pi has one I2C bus and the MCP23008 MCP23017’s have a 3 bit address select port, so in theory you can connect up 8 MCP23008 MCP23017’s giving you a GPIO capability of an additional 128 IO pins using these devices.

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