The light bulb has one of the 120v twine spliced to connect the give up connected to the electricity plug to the com(not unusual) pin of the relay module and the only going to the lamp is attached to the nc(generally closed) pin. With a lot of these mcu’s desiring to hook up with actual international stuff.. Electric powered valves, heaters, cars etc. I want a flexible io board that i can hook as much as an arduino, raspberry pi, beaglebone or carambola.? all of that have an i2c bus. So armed with a mcp23017, i’ve provide you with this io board. The chip bluecore has been designed to reduce the range of outside additives required. The device incorporates automobile-calibration and constructed in self-check bist routine to simplify the development. All hardware and tool firmware is fully proceedings with the bluetooth model 2.0 plus edr specification.