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How to use the MCP23017 Port Expander with the Raspberry Pi | The Pi Hut
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How To Use A MCP23017 I2C Port Expander With The Raspberry Pi - Part 1 - Raspberry Pi Spy
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Using the MCP23017 port expander with WiringPi2 to give you 16 new GPIO ports – part 3 – RasPi.TV
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Add Digital I/O Pins to Raspberry Pi Hardware Using MCP23017 - MATLAB & Simulink Example
Using Four MCP23017's to Control 64 Reed switches | Arduino & Rasperry PI Chess Computer
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Raspberry Pi - ModMyPi MCP23017 HAT - 32 Channel I/O Expansion HAT
