#include "BluetoothSerial.h"
#include "DHT.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif

BluetoothSerial SerialBT;
String receivedMessage;
const String turnON ="1";
const String turnOFF ="0";
const int LEDpin = 13;

#define DHTPIN 27    // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22   // DHT 22 (AM2302)

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  SerialBT.begin("ESP32_LED_Control"); // Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");
  pinMode(LEDpin, OUTPUT);
  digitalWrite(LEDpin, HIGH);
  dht.begin();
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if (isnan(h) || isnan(t)) {
    SerialBT.println(F("Failed to read from DHT sensor!"));
    return;
  }

  if (SerialBT.available()) {
    receivedMessage = SerialBT.readString();
    SerialBT.print("Received: ");
    SerialBT.println(receivedMessage);
    SerialBT.print(F("Temperature: "));
    SerialBT.println(t);
    if (receivedMessage == turnON) {
      SerialBT.println("LED ON");
      digitalWrite(LEDpin, HIGH); // turn the LED ON
    }

    if (receivedMessage == turnOFF) {
      SerialBT.println("LED OFF");
      digitalWrite(LEDpin, LOW); // turn the LED off
    }
  }
  delay(20);
}