Connect the Components: Follow the circuit diagram to connect the water sensor, LED, and Arduino. Upload the Code: Open the Arduino IDE. Copy and paste the provided code into the IDE. Select the ...

Low Water Level: The first LED illuminated when the charge time was less than 10800 microseconds. Medium Water Level: The second LED illuminated when the charge time was between 10900 and 11250 ...

We connected $\\mathbf{p H}$ sensor and solar cell into Arduino Board to control data transmission via red laser communication or popular known as visible light communication (VLC). The sensor was ...