Features: Hardware components: Arduino, relay module, jumper wires, and external power source Code: Arduino code for controlling the relay based on sensor input or a manual switch Applications: Home ...

Connect the Hardware: Follow the hardware setup instructions detailed above to connect moisture sensors, the water level system, SIM800L module, and relay modules. Power Up the System: Power up your ...

The +5V supply line (VCC) of the module is linked to the 5V line of the Arduino. GND of the module is the common (0V) connection. The digital signal output to be detected (usually marked as DO in the ...