Arduino Soil Moisture Sensor

This video tutorial explains how to use a resistive soil moisture sensor with an Arduino. It covers the sensor's functionality, wiring, and coding using Tinkercad. The tutorial also discusses powering the sensor intermittently to prevent probe oxidation and using LEDs to indicate soil moisture levels. Calibration and practical applications are highlighted for effective sensor use.

What is the primary working principle of a resistive soil moisture sensor?

• It measures the pH level of the soil.

• It measures the capacitance between two probes.

• It measures the resistance between two probes.

• It measures the temperature of the soil.

Which online tool is used in the video to simulate the Arduino circuit?

• Fritzing

• Proteus

• Tinkercad

• Eagle

Why is it not recommended to keep the soil moisture sensor powered on continuously?

• It consumes too much power.

• It causes the sensor to overheat.

• It can damage the Arduino board.

• It leads to faster oxidation of the probes.

How can you extend the lifetime of a soil moisture sensor?

• By using a higher voltage.

• By powering it on intermittently.

• By using a larger sensor.

• By keeping it powered on continuously.

What is the purpose of setting a threshold value in the Arduino code?

• To determine when to power off the sensor.

• To calibrate the sensor for temperature changes.

• To differentiate between wet and dry soil conditions.

• To adjust the sensor's sensitivity.

What happens when the soil moisture reading exceeds the threshold value?

• The red LED turns on.

• The green LED turns on.

• Both LEDs turn off.

• Both LEDs turn on.

Why might there be a delay in the LED response when adjusting the moisture level?

• The code includes a delay between readings.

• The sensor needs time to warm up.

• The LEDs have a slow response time.

• The Arduino board is slow.