#include <WiFiClientSecure.h>
// https://randomnerdtutorials.com/esp32-dht11-dht22-temperature-humidity-sensor-arduino-ide/
#include "DHT.h"

#define DHTPIN 4     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.
// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "MyWiFi"; 
const char* password = "wifipass";

const char* server = "xn--b1adcabcbus0ac.xn--p1ai";  // Server URL
const char* dkey = "123/andhereisaplaceforakeystring=="; // device id & key received during registration process

WiFiClientSecure client;

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(115200);
  delay(100);

  Serial.print("Attempting to connect to SSID: ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);

  // attempt to connect to Wifi network:
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    // wait 1 second for re-trying
    delay(1000);
  }

  Serial.print("Connected to ");
  Serial.println(ssid);

  client.setInsecure();

  pinMode (2, OUTPUT);

  dht.begin();
  delay (2000);
}

void loop() {
  digitalWrite (2, HIGH);
  delay (500);
  digitalWrite (2, LOW);
  delay (500);  

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.println(F("°C "));
  // Make a HTTP request:
  Serial.println("\nStarting connection to server...");
  if (!client.connect(server, 443))
    Serial.println("Connection failed!");
  else {
    Serial.println("Connected to server!");
  }
  char buf[256];
  sprintf (buf, "GET https://%s/app/v1/put?key=%s&v=%f HTTP/1.1", server, dkey, t);
  client.println(buf);
  sprintf (buf, "Host: %s", server); 
  client.println(buf);
  client.println("Connection: close");
  client.println();

  while (client.connected()) {
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      Serial.println("headers received");
      break;
    }
  }
  // if there are incoming bytes available from the server, read them and print them:
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
  }

  client.stop();
  Serial.println ();

}