alloneslife MCP23017 Embedded Development GPIO Module, I2C Interface Expansion Board with 16 Channel Layout, Compact PCB Form for Organized Project Wiring

I2C GPIO Expansion: Add 16 extra control channels through the labeled I2C connection, helping development boards manage more switches, modules, and control lines with clearer routing Clear 16 Port Layout: PA0 PA7 and PB0 PB7 markings make each channel easier to identify, so routing signals, checking assignments, and tracing takes less trial and error Project Ready Flexibility: Use the module for controller expansion, device linking, learning labs, and automation builds when you need more accessible GPIO points in a small footprint Single Module Supply: Includes the GPIO expansion board for direct integration, giving repair workstations, classroom demos, and maker builds a focused part for hands on assembly Compact PCB Structure: The 65 x 19 mm green board fits neatly into prototype builds, while through hole rows and mounting holes stable placement during repeated setup work