Smart Dustbin Project Documentation

Summary

This project involves a smart dustbin that uses an ultrasonic sensor to measure the level of waste, an IR sensor to detect obstacles, and a servo motor to open the dustbin lid. The system is controlled by an ESP8266 NodeMCU microcontroller, and it is powered via a USB power source.

Component List

1. ESP8266 NodeMCU

   • Description: A low-cost Wi-Fi microcontroller with multiple GPIO pins.
   • Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN

2. HC-SR04 Ultrasonic Sensor

   • Description: A sensor used to measure distance by using ultrasonic waves.
   • Pins: VCC, TRIG, ECHO, GND

3. IR Sensor

   • Description: An infrared sensor used to detect obstacles.
   • Pins: out, gnd, vcc

4. Micro Servo 9G

   • Description: A small servo motor used to open and close the dustbin lid.
   • Pins: GND, +5V, PWM

5. USB Power

   • Description: A power source providing 5V and GND.
   • Pins: +, -

Wiring Details

ESP8266 NodeMCU

• D1: Connected to TRIG pin of the HC-SR04 Ultrasonic Sensor
• D2: Connected to ECHO pin of the HC-SR04 Ultrasonic Sensor
• D3: Connected to out pin of the IR Sensor
• D4: Connected to PWM pin of the Micro Servo 9G
• 3V3: Connected to vcc pin of the IR Sensor
• GND: Connected to - pin of the USB Power, gnd pin of the IR Sensor, GND pin of the Micro Servo 9G, and GND pin of the HC-SR04 Ultrasonic Sensor
• VIN: Connected to + pin of the USB Power

HC-SR04 Ultrasonic Sensor

• TRIG: Connected to D1 pin of the ESP8266 NodeMCU
• ECHO: Connected to D2 pin of the ESP8266 NodeMCU
• VCC: Connected to + pin of the USB Power
• GND: Connected to GND pin of the ESP8266 NodeMCU

IR Sensor

• out: Connected to D3 pin of the ESP8266 NodeMCU
• gnd: Connected to GND pin of the ESP8266 NodeMCU
• vcc: Connected to 3V3 pin of the ESP8266 NodeMCU

Micro Servo 9G

• GND: Connected to GND pin of the ESP8266 NodeMCU
• +5V: Connected to + pin of the USB Power
• PWM: Connected to D4 pin of the ESP8266 NodeMCU

USB Power

• -: Connected to GND pin of the ESP8266 NodeMCU
• +: Connected to VIN pin of the ESP8266 NodeMCU and +5V pin of the Micro Servo 9G

Code Documentation

ESP8266 NodeMCU Code

/*
 * Smart Dustbin Project
 * This code uses an ultrasonic sensor to measure the dustbin level, an IR sensor
 * to detect obstacles, and a servo motor to open the dustbin lid.
 */

#include <Servo.h>

// Pin definitions
const int trigPin = D1;
const int echoPin = D2;
const int irPin = D3;
const int servoPin = D4;

Servo dustbinServo;

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Initialize pins
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(irPin, INPUT);
  dustbinServo.attach(servoPin);

  // Set initial servo position
  dustbinServo.write(0); // Close the lid
}

void loop() {
  // Measure distance using ultrasonic sensor
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) / 29.1;

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

  // Check for obstacle using IR sensor
  int irValue = digitalRead(irPin);
  if (irValue == LOW) { // Obstacle detected
    dustbinServo.write(90); // Open the lid
    delay(5000); // Keep the lid open for 5 seconds
    dustbinServo.write(0); // Close the lid
  }

  delay(1000); // Wait for 1 second before next measurement
}

HC-SR04 Ultrasonic Sensor Code

// No code required for this component

IR Sensor Code

void setup() {
  // put your setup code here, to run once:
}

void loop() {
  // put your main code here, to run repeatedly:
}

Micro Servo 9G Code

// No code required for this component

This documentation provides a comprehensive overview of the smart dustbin project, including the components used, their wiring details, and the code running on the ESP8266 NodeMCU microcontroller.