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

// WiFi and ThingSpeak settings
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
long myChannelNumber = 2660042;
const char *myWriteAPIKey = "UJLIOU9RCJM65UO6";

// Sensor pins
const int DHT_PIN = 19;
int trigger = 25;
int echo = 26;

// ThingSpeak and sensor objects
WiFiClient client;
DHTesp dhtSensor;
TempAndHumidity data;
int statusCode;

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

  // Pin setup
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  
  // DHT sensor setup
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {
  // WiFi connection
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect");
    while (WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid, pass);
      Serial.print(".");
      delay(5000);
    }
    Serial.println("\nConnected");
  }

  // Get temperature and humidity data
  data = dhtSensor.getTempAndHumidity();
  Serial.println("Humidity: " + String(data.humidity, 1));
  Serial.println("Temperature: " + String(data.temperature, 2));
  Serial.println("-----------");

  // Get distance from ultrasonic sensor
  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);
  int reading = pulseIn(echo, HIGH);
  int distance = (reading * 0.034 / 2);
  Serial.println("Distance: " + String(distance) + " cm");

  // Send data to ThingSpeak
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);
  ThingSpeak.setField(3, distance);

  // Write data to ThingSpeak
  statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (statusCode == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem writing data. HTTP error code: " + String(statusCode));
  }

  delay(10000); // Delay to avoid exceeding ThingSpeak update rate limits
}