#include <ThingSpeak.h>
#include <WiFi.h>
#include <DHTesp.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
DHTesp dhtSensor;
WiFiClient client;
const int DHT_PIN = 17;
const int TRIGGER_PIN = 12;
const int ECHO_PIN = 14;
long myChannelNumber =  2635092;
const char* myWriteAPIKey = " mwa0000034746724";
int statusCode;
float distance;
void setup() {
  Serial.begin(115200);
  ThingSpeak.begin(client);
  WiFi.mode(WIFI_STA);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  connectToWiFi();
}
void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    connectToWiFi();
  } 
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  distance = (duration * 0.0344) / 2;
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  Serial.println("Humidity: " + String(data.humidity, 1));
  Serial.println("Temperature: " + String(data.temperature, 2));
  Serial.println("Distance: " + String(distance));
  Serial.println("...................");
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);
  ThingSpeak.setField(3, distance);
  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); 
}
void connectToWiFi() {
  Serial.print("Attempting to connect to ");
  Serial.print(ssid);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }  
  Serial.println("\nConnected to WiFi");
}