Send MQTT messages by pressing a button on a NodeMCU ESP-12E. When a message is then received by the Raspberry Pi, a buzzer plays a sound. Pressing the button on the ESP-12E publishes an MQTT message ...

Equipments: 7 leds,1 buzzer,1 push button,8 resistances,11 Cables,UNO Breadboard and Arduino UNO. Game: Leds blink at the same time and number of the leds who blink are random. Player tries to count ...