#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "YourWiFiSSID";
const char* password = "YourWiFiPassword";
const char* serverAddress = "YourServerAddress"; // Address of your central server
const int serverPort = 80; // Port number of your server
const int sensorPin = 2; // Pin connected to the sensor
const int ledPin = 13; // Pin connected to the LED for visual indication
const int threshold = 800; // Threshold value for waste level detection

WiFiClient client;

void setup() {
  Serial.begin(115200);
  pinMode(sensorPin, INPUT);
  pinMode(ledPin, OUTPUT);
  connectToWiFi();
}

void loop() {
  int wasteLevel = analogRead(sensorPin);
  
  if (wasteLevel > threshold) {
    digitalWrite(ledPin, HIGH); // Turn on LED if waste level is high
    sendDataToServer(wasteLevel); // Send waste level data to server
  } else {
    digitalWrite(ledPin, LOW);
  }
  
  delay(1000);
}

void connectToWiFi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  
  Serial.println("Connected to WiFi");
}

void sendDataToServer(int wasteLevel) {
  if (client.connect(serverAddress, serverPort)) {
    String postData = "waste_level=" + String(wasteLevel);
    
    client.println("POST /updateWasteLevel HTTP/1.1");
    client.println("Host: " + String(serverAddress));
    client.println("Content-Type: application/x-www-form-urlencoded");
    client.println("Content-Length: " + String(postData.length()));
    client.println();
    client.print(postData);
    
    Serial.println("Data sent to server: " + postData);
  } else {
    Serial.println("Connection to server failed");
  }
  
  client.stop();
}