i2c Tecnology Software: Micropython, i2c Hardwaer: MCU Esp8266, Relay board 16ch whit MCP23017 Install micropython. Copy all scripts .py Run i2c.py Assembly References https://arduino103.blogspot.com/2018/08/micropython-utiliser-un-mcp23017-sur.html https://github.com/mchobby/esp8266-upy/tree/master/mcp230xx