CIPAD_09. Indicateur de niveau d'eau, pompage automatisé, 2 modes

Introduction

This tutorial guides you through the process of using an LCD screen to display the water level in a tank and automate a pump with Arduino based on the selected mode. This project is perfect for beginners looking to enhance their skills in electronics and programming, as well as for those interested in home automation solutions.

Step 1: Gather Required Components

Before starting the project, ensure you have the following components:

• Arduino board (e.g., Arduino Uno)
• LCD screen (16x2 or similar)
• Water level sensor
• Relay module (for pump control)
• Water pump
• Jumper wires
• Breadboard
• Power supply for the pump

Practical Tips

• Check compatibility of components with the Arduino board.
• Ensure the water level sensor can withstand the moisture in the tank.

Step 2: Set Up the Circuit

Follow these steps to connect your components:

1. Connect the LCD Screen

   • Connect the LCD pins to the Arduino according to the following configuration:
     • VSS to GND
     • VDD to 5V
     • V0 (contrast) to a potentiometer for brightness adjustment
     • RS, RW, E pins to digital pins on the Arduino (e.g., 12, 11, 10).

2. Connect the Water Level Sensor

   • Connect the sensor's output pin to an analog input pin on the Arduino (e.g., A0).
   • Connect VCC to 5V and GND to ground.

3. Connect the Relay Module

   • Connect the relay's control pin to a digital pin on the Arduino (e.g., pin 9).
   • Connect the relay's VCC to 5V and GND to ground.

4. Connect the Water Pump

   • Connect the pump to the relay output according to the specifications, ensuring proper power management.

Common Pitfalls

• Double-check all connections to avoid short circuits.
• Ensure the relay can handle the pump's voltage and current requirements.

Step 3: Write the Arduino Code

Below is a basic structure of the code you will need to implement the functionality:

#include <LiquidCrystal.h>

// Initialize the LCD with the specified pins
LiquidCrystal lcd(12, 11, 10, 5, 4, 3);
const int sensorPin = A0; // Water level sensor pin
const int relayPin = 9;    // Relay pin for the pump

void setup() {
    lcd.begin(16, 2);
    pinMode(relayPin, OUTPUT);
    digitalWrite(relayPin, LOW); // Ensure the pump is off initially
}

void loop() {
    int waterLevel = analogRead(sensorPin);
    displayWaterLevel(waterLevel);
    controlPump(waterLevel);
}

void displayWaterLevel(int level) {
    lcd.clear();
    lcd.print("Water Level:");
    lcd.setCursor(0, 1);
    lcd.print(level);
}

void controlPump(int level) {
    if (level < threshold) { // Set a threshold level for pump activation
        digitalWrite(relayPin, HIGH); // Activate pump
    } else {
        digitalWrite(relayPin, LOW); // Deactivate pump
    }
}

Explanation of Code

• The LiquidCrystal library is used to control the LCD.
• The water level is read from the sensor, displayed on the LCD, and the pump is controlled based on a specified threshold.

Step 4: Test the System

Once you have uploaded the code to your Arduino, follow these steps to test your setup:

1. Power on the System: Ensure everything is connected and powered.
2. Monitor the LCD: Check that the water level is displayed correctly.
3. Simulate Water Levels: Manually change the water level to see if the pump activates and deactivates as expected.

Real-World Applications

This project can be adapted for various applications, including:

• Automated irrigation systems.
• Water level monitoring in aquariums.
• Smart water storage systems for homes.

Conclusion

You have successfully set up an automated water level monitoring system using Arduino and an LCD display. This project introduces you to basic electronics, programming, and practical applications of automation. For your next steps, consider expanding the project by adding more sensors or integrating it with IoT platforms for remote monitoring and control.