Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD ... the LiquidCrystal.h header and then on line 3 the pins where to connect the LCD display.

If you are designing your own intelligent “Graden Computer” with an optional digital plant moisture sensor/water pump controller ... is linked to the 5V line of the Arduino. GND of the module is the ...

When the sensor detects that the moisture content is already below 30%, it sends a signal to the Arduino, which, in turn, activates a water pump to provide hydration to the plant. As soon as the ...

With an Arduino, you can build a system that will automatically water your plants when needed ... This one is a little more ...

What he ended up with was a water level sensor made from PVC pipe and a few ... placed onto small sections of PVC pipe, which in turn connect to a four-way PVC cross connector.

Using a small sensor, an Arduino Pro Mini, a relay, transformer, and an outlet box, he created a system that can detect the amount of water in the tree's tray and blink a morse code message when ...