/**
   ESP32 + DHT22 Example for Wokwi
   
   https://wokwi.com/arduino/projects/322410731508073042
*/

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

#define echoPin 12 // Pin D12 esp32 ke pin Echo Ultrasonik
#define trigPin 13 // pin D13 esp32 ke pin Trig Ultrasonik

const int DHT_PIN = 15;
const char* ssid = "Wokwi-GUEST";
const char* pw = "";

WiFiClient client;

unsigned long myChannelNumber = 1;
const char* myAPIKey = "RTK1OU1LQLEKJ5OX";
const char* server = "api.thingspeak.com";

unsigned long lastTime = 0;
unsigned long timerDelay = 30000;

float duration; // variable untuk gelombang suara
float distance; // variable untuk mengukur jarak

int temperatureC;
int humidity;

DHTesp dhtSensor;

void setup() {
  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  dhtSensor.getPin();
  WiFi.begin(ssid, pw);
  while(WiFi.status() != WL_CONNECTED){
    delay(100);
    Serial.println(".");
  }
  Serial.println("WiFi terhubung");
  Serial.println(WiFi.localIP());

  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  temperatureC = dhtSensor.getTemperature();

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH); // sinyal gelombang suara
  // menghitung nilai distance
  distance = duration * 0.017;

  Serial.println("Temperature C");
  Serial.println(temperatureC);

  humidity = dhtSensor.getHumidity();
  Serial.println("Humidity %");
  Serial.println(humidity);

  Serial.println("Distance cm");
  Serial.println(distance);

  ThingSpeak.setField(1, temperatureC);
  ThingSpeak.setField(2, humidity);
  ThingSpeak.setField(3, distance);

  int x = ThingSpeak.writeFields(myChannelNumber, myAPIKey);
  if (x == 200){
    Serial.println("Channel update berhasil");
  } else {
    Serial.println("Masalah dalam update channel, HTTP error code " + String(x));
  }
}