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Arduino Plant Watering Alert

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Arduino Plant Watering Alert

Automation

Arduino Plant Watering Alert

Use a moisture sensor and LED indicator to know when plants need water.

By Circuit Garden

Updated Jun 2026

Budget

$18-$32

Difficulty

Intermediate

Time

2 hours

Materials

Compact project bill of materials.

Soil moisture sensor
1 sensor
$4-$8 est.

Tools Needed

Arduino Uno

Steps

1
Wire the sensor
Connect the moisture sensor to the Arduino analog input.
2
Upload the sketch
Upload the threshold-based alert sketch.