TrashOut

SMART WASTE MANAGEMENT SYSTEM - IOT BASED PROJECT

Arduino code used for distance sensor. It uploads the realtime time distance in cm to firebase relatime databse

Here is the code:

#include <ESP8266WiFi.h> #include <FirebaseArduino.h>

//Firebase settings #define FIREBASE_HOST "<YOUR_FIREBASE_PROJECT_NAME>.firebaseio.com" #define FIREBASE_AUTH "<YOUR_FIREBASE_SECRET>"

//Wi-Fi settings #define WIFI_SSID "RedmiK20" #define WIFI_PASSWORD "111111111"

//Define trigger and echo digital pins const int trigPin = 5; const int echoPin = 4;

// The amount of time the ultrassonic wave will be travelling for long duration = 0; // Define the distance variable double distance = 0;

void setup() {

// Connect to Wi-Fi
Serial.print("Wi-Fi...");
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print("Connecting...");
while (WiFi.status() != WL_CONNECTED)
{
    Serial.print(".");
    delay(500);
}
Serial.println();
Serial.print("Connected to: ");
Serial.println(WiFi.localIP());

Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);

// Ultrasonic sensor, set echo as Input and trigger as Output
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);

Serial.begin(9600);

}

void loop() {

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

 // handle error 
if (Firebase.failed()) { 
  Serial.print("setting /number failed:"); 
  Serial.print(Firebase.error());   
  return; 
}

delay(500);

}

void getDistance() { // Clear trigPin digitalWrite(trigPin, LOW); delayMicroseconds(2);

// trigPin HIGH por 10ms
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

//Reads echoPin, returns the travel time of the sound wave in ms
duration = pulseIn(echoPin, HIGH);

// Calculating the distance, in centimeters, using the formula described in the first section.
distance = duration * 0.034 / 2;
// Sends the distance value to Firebase
Firebase.setFloat("GarbageCans/can1/distance", distance);

}