Plant Waterer With Arduino Uno

1// Define pins
2const int soilSensorPin = A0;    // Soil moisture sensor connected to A0
3const int pumpPin = 5;          // Pump connected to digital pin 5
4
5void setup() {
6  // Initialize serial communication for debugging
7  Serial.begin(9600);
8  
9  // Set pin modes
10  pinMode(soilSensorPin, INPUT);
11  pinMode(pumpPin, OUTPUT);
12  
13  // Ensure pump is off at start
14  digitalWrite(pumpPin, LOW);
15}
16
17
18
19void loop() {
20  // Read soil moisture sensor
21  int soilMoisture = analogRead(soilSensorPin);
22  
23  // Print value to serial monitor for debugging
24  Serial.print("Soil Moisture Value: ");
25  Serial.println(soilMoisture);
26  
27  // Check if soil is too dry (lower value = drier for most sensors)
28  if (soilMoisture < 200) {        // change this value to get a different low-moisture level
29    digitalWrite(pumpPin, HIGH);   // Turn on pump
30  } else if (soilMoisture > 220) { // change this value to get a different shutoff moisture
31    digitalWrite(pumpPin, LOW);    // Turn off pump
32  }
33  
34  // Wait 1 second before next reading
35  delay(1000);
36}