IoT-Based Smart Dustbin nodemcu

 

 IoT-Based Smart Dustbin 

Components:

• ESP8266 (NodeMCU)

• Ultrasonic Sensor (HC-SR04)

• Servo Motor

• Jumper Wires

• Power Supply

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Circuit

Ultrasonic Sensor (HC-SR04):

1. • Trig → D2

   • Echo → D3

   • VCC → 5V

   • GND → GND

2. Servo Motor:

   • Signal → D4 (PWM Pin)

   • VCC → 5V

   • GND → GND

3. ESP8266:

   • GND → GND

   • VCC → 3.3V (or 5V if required)

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Code for IoT-Based Smart Dustbin:

#include <ESP8266WiFi.h>
#include <Servo.h>

const char *ssid = "your-SSID";  // Replace with your WiFi SSID
const char *password = "your-PASSWORD";  // Replace with your WiFi Password

// Ultrasonic sensor pins
const int trigPin = D2;
const int echoPin = D3;

// Servo motor pin
const int servoPin = D4;

// Create a Servo object
Servo myServo;

// Threshold distance (in cm) to consider the dustbin full
const int thresholdDistance = 10;

void setup() {
  // Initialize serial monitor
  Serial.begin(115200);

  // Initialize the ultrasonic sensor pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  // Initialize the servo motor
  myServo.attach(servoPin);
  myServo.write(0); // Close the dustbin lid initially

  // 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!");
}

void loop() {
  long duration, distance;

  // Send a pulse to trigger the ultrasonic sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the time it took for the pulse to return
  duration = pulseIn(echoPin, HIGH);

  // Calculate distance (in cm)
  distance = (duration / 2) / 29.1;

  // Print distance to the serial monitor
  Serial.print("Distance: ");
  Serial.println(distance);

  // If the dustbin is full (distance is less than the threshold)
  if (distance < thresholdDistance) {
    Serial.println("Dustbin is Full!");
    myServo.write(90);  // Open the dustbin lid (90 degrees)
    // Send a notification (This can be expanded with email/notification functionality)
    // Example: Send an alert via a web server or mobile app here.
  } else {
    myServo.write(0);  // Close the dustbin lid
  }

  delay(1000);  // Wait for 1 second before checking again
}