16channel IO expansion module for flexible input/output expansion in IoT and home automation projects. Key benefits Increases I/O capacity: expands your project with additional digital input and output ports to manage more devices and sensors. Scalable and versatile: connect multiple modules to tailor the I/O plane to your needs. Easy to manage with I2C: uses the MCP23017 chip for reliable, standard I2C communication. Efficient data handling: supports I2C frequencies of 100k, 400k, and 7M for faster data transfer in dataintensive environments. Compact and practical form factor: designed for embedded and spaceconstrained installations. Core features 16 channels per module: each module provides 16 digital IO ports for expansion. I2C interface via MCP23017: enables straightforward communication over the I2C bus. Multiple modules, many ports: connect up to eight modules to achieve a total of 128 IO ports for largescale projects. Addressable expansion: three address pins per module to set unique I2C addresses, enabling easy multimodule configurations. Compatibility: designed to work with standard I2Cenabled controllers and development boards using the MCP23017 platform. Attributes Function: digital input/output expansion to extend control and sensing capabilities. Compatibility: standard I2C protocol with MCP23017 integration; works with typical microcontrollers and development environments that support I2C. Size and form factor: compact design suitable for embedded and spaceconstrained installations. Performance: scalable I/O expansion with up to eight modules and a total of 128 IO ports; flexible I2C speed options for various data throughput needs. Use scenarios Smart home systems: add extra IO to manage lighting controllers, window shades, door sensors, and environmental monitors. IoT sensing and data collection: expand digital inputs for multiple sensors, buttons, and status signals, enabling richer data from a single controller. Robotics and automation: drive multiple actuators and read sensors across several modules, enabling complex, multimodule control architectures. Notes Each module provides three address pins to configure its I2C address, allowing up to eight unique addresses and module connections on the same bus. The specification highlights I2C frequencies of 100k, 400k, and 7M to optimize communication depending on your application requirements.