Automatic Plant Watering System Block Diagram The below block diagram gives us a clear view of how this automatic plant watering system will work. Basically we have the Arduino Uno R4 which will read ...

Circuit and Working Fig. 2 shows the circuit diagram of the humidifier. The system is built around an Arduino Uno (MOD1), a 5V SPDT relay module, a humidity sensor (DHT22), an ultrasonic humidifier, ...

Arduino Uno/Nano Bluetooth Module (e.g., HC-05 or HC-06) 4-Channel Relay Module Smartphone with a Bluetooth terminal app Electrical appliances (e.g., LED, fan) Breadboard and jumper wires.