Introduction

This experiment shows how to measure the pH level of soil using a pH sensor.

Components Needed

• Soil pH Sensor
• Arduino
• Jumper Wires

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Circuit Setup

1. Connect the VCC and GND pins of the pH sensor to the 5V and GND on Arduino.
2. Connect the sensor’s output pin to an analog input pin (e.g., A0) on Arduino.

The sensor will measure the pH level of the soil, and the Arduino will read and display it.

Code for Soil pH Level Detection

Upload the following code to your Arduino to measure the soil pH level:

const int phPin = A0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  int phLevel = analogRead(phPin);
  Serial.print("Soil pH Level: ");
  Serial.println(phLevel);
  delay(1000);
}
            

Explanation

The pH sensor measures the acidity or alkalinity of the soil, and the Arduino reads the analog value to determine the pH level.

Troubleshooting

• Ensure that the sensor is properly inserted into the soil for accurate readings.
• If the readings seem incorrect, verify the sensor wiring and test with a known pH solution.