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

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

DHTesp srikrishna;
TempAndHumidity data;
long ChannelNumber = 2623662;
const char* myWriteAPIKey = "SP16H5XUYDSSNDC8";
int statusCode;
WiFiClient client;

int trigger_pin = 14;
int echo_pin = 12;    

void setup() {
  WiFi.mode(WIFI_STA);
  Serial.begin(115200);
  srikrishna.setup(18, DHTesp::DHT22);
  pinMode(trigger_pin, OUTPUT);
  pinMode(echo_pin, INPUT);
  ThingSpeak.begin(client);
}

int wdistance() {
  digitalWrite(trigger_pin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigger_pin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger_pin, LOW);
  long duration = pulseIn(echo_pin, HIGH);
  int distance = duration * 0.034 / 2;
  return distance;
}

void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("Attempting to connect to WiFi!");
    while (WiFi.status() != WL_CONNECTED) {
      Serial.print(".");
      WiFi.begin(ssid, pass);
      delay(2000);
    }
    Serial.println("Connected to WiFi!");
  }

  delay(2000);
  data = srikrishna.getTempAndHumidity();

  Serial.println("Humi : " + String(data.humidity));
  Serial.println("Temp : " + String(data.temperature));
  Serial.println("-------------------");

  int distance = wdistance();
  Serial.println("Distance: " + String(distance) + " cm");

  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);
  ThingSpeak.setField(3, distance);
  statusCode = ThingSpeak.writeFields(ChannelNumber, myWriteAPIKey);

  if (statusCode == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem Writing data. HTTP error code: " + String(statusCode));
  }

  delay(15000); 
}