#include <WiFi.h> 
#include "DHTesp.h" 
#include <ThingSpeak.h>

const int DHT_PIN = 13; // Pin connected to DHT22 sensor

const char* WIFI_NAME = "Wokwi-GUEST"; 
const char* WIFI_PASSWORD = "";

const int myChannelNumber = 2833061; // Your ThingSpeak channel number
const char* myApiKey = "94R15ICM1UY3CJT0"; // Your ThingSpeak API key
const char* server = "api.thingspeak.com"; 

#define TRIG_PIN 23   // Ultrasonic Sensor Trigger Pin
#define ECHO_PIN 22  // Ultrasonic Sensor Echo Pin

DHTesp dhtSensor; 
WiFiClient client;

void setup() {
  Serial.begin(115200); 

  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22); 

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD); 
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi.."); 
  }
  Serial.println("Connected to WiFi");
  ThingSpeak.begin(client); 
}

void loop() { 
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  long duration = pulseIn(ECHO_PIN, HIGH);
  int distance =  duration * 0.017;  // Convert to cm


  TempAndHumidity data = dhtSensor.getTempAndHumidity(); 
  
  ThingSpeak.setField(1, data.temperature); // Send temperature to field 1
  ThingSpeak.setField(2, data.humidity); // Send humidity to field 2
  ThingSpeak.setField(3, distance);
  
  int result = ThingSpeak.writeFields(myChannelNumber, myApiKey); 

  
  delay(100); 
}