Arduino IDE Code.txt

//* USE THIS CODE BY YOUR OWN  LOGIC AS IT HAS  HARDWARE CONNCETED SO MIGHT BE PINS ARE DIFFRENT AND CHNAGED.
#include <WiFi.h>
#include <WebServer.h>

// WiFi credentials
const char* ssid = "//Your wifi id here";
const char* password = "//password here";

// Web server on port 80
WebServer server(80);

// Pin definitions
const int trigPin = 14;  // Ultrasonic sensor trig pin (P14)
const int echoPin = 27;  // Ultrasonic sensor echo pin (P27)
const int ledPin = 26;   // Pin for LED (P26)

// Variables
long duration;
int waterLevel;
bool motorState = false;  // Motor (LED) initially OFF

// Offset for sensor height above the glass (in cm)
const int sensorOffset = 2;  // Adjust this value as needed (2-4 cm)

// Handle root request
void handleRoot() {
  server.send(200, "text/plain", "Water Level System is Online");
}

// Handle motor control request (LED in place of motor)
void handleMotor() {
  String state = server.arg("state");
  
  if (state == "on") {
    motorState = true;
    digitalWrite(ledPin, HIGH);  // Turn LED ON (motor ON)
    server.send(200, "text/plain", "Motor ON");
  } 
  else if (state == "off") {
    motorState = false;
    digitalWrite(ledPin, LOW);   // Turn LED OFF (motor OFF)
    server.send(200, "text/plain", "Motor OFF");
  } 
  else if (state == "check") {  // Handle 'check' state to return current motor status
    server.send(200, "text/plain", motorState ? "on" : "off");
  }
  else {
    server.send(400, "text/plain", "Invalid Motor State");
  }
}

// Handle water level request
void handleWaterLevel() {
  waterLevel = getWaterLevel();  // Get updated water level
  String waterLevelStr = String(waterLevel);  // Convert to string
  server.send(200, "text/plain", waterLevelStr);  // Send water level as response
}

// Function to get water level using ultrasonic sensor
int getWaterLevel() {
  // Send a 10us pulse to the trig pin to start measurement
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Read the echo pin and calculate distance (in cm)
  duration = pulseIn(echoPin, HIGH);
  int distance = duration * 0.034 / 2;  // Calculate distance in cm
  
  // Set maximum distance based on the glass height (8.5 cm) and sensor offset
  int glassHeight = 8.5;  // Height of the glass in cm
  int effectiveHeight = glassHeight + sensorOffset;  // Adjusted height for sensor placement
  int level = map(distance, 0, effectiveHeight, 100, 0);  // Map distance to percentage (0% = empty)

  return constrain(level, 0, 100);  // Ensure result stays between 0% and 100%
}

void autoControlMotor() {
  waterLevel = getWaterLevel();  // Get updated water level
  
  if (waterLevel < 40 && !motorState) {
    motorState = true;
    digitalWrite(ledPin, HIGH);  // Turn LED ON (motor ON)
    Serial.println("Motor turned ON automatically (Water < 40%)");
  } 
  else if (waterLevel > 75 && motorState) {
    motorState = false;
    digitalWrite(ledPin, LOW);  // Turn LED OFF (motor OFF)
    Serial.println("Motor turned OFF automatically (Water > 75%)");
  }
}

void setup() {
  Serial.begin(115200);
  
  // Initialize the pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);  // Ensure LED is initially off

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  Serial.print("ESP32 IP Address: ");
  Serial.println(WiFi.localIP());  // Print the IP address

  // Setup web server routes
  server.on("/", handleRoot);  // Root route
  server.on("/motor", handleMotor);  // Motor control route
  server.on("/waterlevel", handleWaterLevel);  // Water level route
  
  server.begin();
  Serial.println("Server started");
}

void loop() {
  server.handleClient();  // Handle incoming client requests
  autoControlMotor();  // Check and auto control motor based on water level
  delay(2000);  // Delay to prevent overloading the sensor checks
}