Automatic Irrigation System

const int sensorPin = A0;

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

void loop() {
  int moisture = analogRead(sensorPin);   // ~300 (wet) … ~1023 (dry)
  Serial.println(moisture);
  delay(300);
}

import processing.serial.*;

Serial myPort;
int moisture = 0;

void setup() {
  size(400, 200);
  myPort = new Serial(this, Serial.list()[0], 9600);
  myPort.bufferUntil('\n');
}

void draw() {
  background(255);
  fill(0);
  textSize(20);
  text("Soil Moisture: " + moisture, 50, 60);

  fill(0, 100, 255);                         // full bar = wet
  float w = map(moisture, 1023, 300, 0, 300); // reversed range: low value = wet
  rect(50, 100, constrain(w, 0, 300), 30);    // adjust 300/1023 after calibration
}

void serialEvent(Serial p) {
  String val = p.readStringUntil('\n');
  if (val != null) {
    val = trim(val);
    if (val.matches("\\d+")) moisture = int(val);
  }
}

const int RELAY_PIN = 8;
const int PUMP_ON  = LOW;    // active-LOW relay module
const int PUMP_OFF = HIGH;   // swap these if your module is active-HIGH

void setup() {
  Serial.begin(9600);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, PUMP_OFF);   // make sure the pump starts OFF
}

void loop() {
  if (Serial.available() > 0) {
    char cmd = Serial.read();
    if (cmd == '1')      digitalWrite(RELAY_PIN, PUMP_ON);
    else if (cmd == '0') digitalWrite(RELAY_PIN, PUMP_OFF);
    // any other character (e.g. newline) is ignored
  }
}

import processing.serial.*;

Serial myPort;

void setup() {
  size(360, 100);
  myPort = new Serial(this, Serial.list()[0], 9600);
}

void draw() {
  background(200);
  fill(0);
  text("Press '1' to turn ON pump, '0' to turn OFF", 20, 50);
}

void keyPressed() {
  if (key == '1' || key == '0') myPort.write(key);
}

#define RELAY_PIN  8
#define SENSOR_PIN A0
#define THRESHOLD  600       // above = too dry

const int PUMP_ON  = LOW;    // active-LOW relay
const int PUMP_OFF = HIGH;

void setup() {
  Serial.begin(9600);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, PUMP_OFF);
}

void loop() {
  int moisture = analogRead(SENSOR_PIN);
  Serial.println(moisture);

  if (moisture > THRESHOLD) digitalWrite(RELAY_PIN, PUMP_ON);   // dry → water
  else                      digitalWrite(RELAY_PIN, PUMP_OFF);  // wet → stop
  delay(1000);
}

import processing.serial.*;

Serial myPort;
int moisture = 0;

void setup() {
  size(400, 200);
  myPort = new Serial(this, Serial.list()[0], 9600);
  myPort.bufferUntil('\n');
}

void draw() {
  background(255);
  fill(0);
  textSize(20);
  text("Soil Moisture: " + moisture, 50, 100);

  if (moisture > 600) {
    fill(255, 0, 0);
    text("Status: DRY \u2013 Watering", 50, 140);
  } else {
    fill(0, 150, 0);
    text("Status: WET \u2013 Idle", 50, 140);
  }
}

void serialEvent(Serial p) {
  String val = p.readStringUntil('\n');
  if (val != null && trim(val).matches("\\d+")) moisture = int(trim(val));
}