#include <WiFi.h>
#include "DHTesp.h"
#include "ThingSpeak.h"
#include <ESP32Servo.h> 

#define TRIG_PIN 2 // ESP32 pin GIOP23 connected to Ultrasonic Sensor's TRIG pin
#define ECHO_PIN 4 
Servo myservo;
const int DHT_PIN = 15;
const int LED_PIN = 13;
const int motor = 18;
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber =2565594 ;
const char* myApiKey = "TOT59J8GC99VBJR8";
const char* server = "api.thingspeak.com";
float duration_us, distance_cm;

DHTesp dhtSensor;
WiFiClient client;

void setup() {
  Serial.begin(115200);
  myservo.attach(5);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(18, OUTPUT);
  // configure the echo pin to input mode
  pinMode(ECHO_PIN, INPUT);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED_PIN, OUTPUT);
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  ThingSpeak.setField(2,data.temperature);
  ThingSpeak.setField(3,data.humidity);
  if (data.temperature > 35 || data.temperature < 12 || data.humidity > 70 || data.humidity < 40) {
    digitalWrite(13, HIGH);
    myservo.write(180);
    ThingSpeak.setField(4,1);
  }else{
    digitalWrite(13, LOW);
    myservo.write(0);
    ThingSpeak.setField(4,0);
  }
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
 
 
  duration_us = pulseIn(ECHO_PIN, HIGH);
  
  distance_cm = 0.017 * duration_us;
  ThingSpeak.setField(1,distance_cm);
  if (distance_cm < 30) {digitalWrite(18, LOW);
  }else{digitalWrite(18, HIGH);
  }
  
  int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
  
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  
  if(x == 200){
    Serial.println("Data pushed successfull");
  }else{
    Serial.println("Push error" + String(x));
  }
  Serial.println("---");

  delay(10000);
}