The keyestudio micro bit Honeycomb traffic light module is fully compatible with the micro bit control board. In the experiment, we connect this module to the micro:bit control board using crocodile clip wire. There are 6 ports on the module, 3 GND ports are connected. The module comes with red, yellow and green 3 LED lights, we can control the 3 LEDs on and off on the module , and simulate the roadside traffic lights flashing