Simple Soil Moisture Monitor with OLED Display | Electronic Market

Introduction

Monitoring the moisture levels of your plants is crucial for their optimal growth. A Soil Moisture Sensor paired with an 0.96 inch OLED Display I2C can provide a real-time visualization of soil moisture levels. Using an Arduino Nano to control this setup offers a straightforward introduction to sensor data visualization.

Technical Specifications

How It Works

The Arduino Nano reads the analog signal from the soil moisture sensor, which varies with the moisture level. The OLED display, connected via I2C, shows the moisture percentage based on the sensor reading.

Code Example

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
const int sensorPin = A0;
void setup() {
  pinMode(sensorPin, INPUT);
  if(!display.begin(SSD1306_I2C_ADDRESS, 0x3C)) {
    for(;;);
  }
  display.display();
  delay(2000);
}
void loop() {
  int sensorValue = analogRead(sensorPin);
  float moisture = map(sensorValue, 0, 1023, 0, 100);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print("Moisture: ");
  display.print(moisture);
  display.println("%");
  display.display();
  delay(1000);
}

Comparison with Other Displays

When to Use

This setup is ideal for small to medium-sized indoor plants where continuous monitoring of soil moisture is required. It's perfect for hobbyists and students looking to learn about basic electronics and sensor integration.

Troubleshooting

• No Display: Check I2C connections and ensure the OLED address is correct.
• Incorrect Moisture Reading: Recalibrate the sensor by adjusting the code's map function.

Ready to build your own moisture monitor? Get your hands on the Arduino Nano, Soil Moisture Sensor, and OLED Display today from our store!