//peripheral_DHT11BLE

#include <ArduinoBLE.h>
#include <DHT.h>
#include <Wire.h>//I2C用ヘッダーファイル
#include <LiquidCrystal_PCF8574.h> // R4対応I2C LCD

// LCD
LiquidCrystal_PCF8574 lcd(0x27); // (0x3F の場合もあり)

// DHT11
#define DHTPIN 11
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

// BLE UUID
#define DHT11_SERVICE_UUID   "01234567-0123-0123-0123-0123456789a0" //16byte(128bit)
#define DHT11_TEMP_UUID      "01234567-0123-0123-0123-0123456789a1"
#define DHT11_HUM_UUID       "01234567-0123-0123-0123-0123456789a2"
#define BLE_LOCAL_NAME       "DHT11_float"
BLEService DHT11_Service(DHT11_SERVICE_UUID);
BLEFloatCharacteristic Temperature_Char(DHT11_TEMP_UUID, BLERead | BLENotify);
BLEFloatCharacteristic Humidity_Char(DHT11_HUM_UUID, BLERead | BLENotify);

void setup() {
  Serial.begin(9600);
  while (!Serial);

  // LCD
  Wire.begin();
  lcd.begin(16, 2);
  lcd.setBacklight(255);
  lcd.print("Peripheral Ready");

  // DHT init
  dht.begin();

  // BLE init
  if (!BLE.begin()) {
    Serial.println("BLE start fail");
    while (1);
  }
  BLE.setLocalName(BLE_LOCAL_NAME);
  BLE.setAdvertisedService(DHT11_Service);
  DHT11_Service.addCharacteristic(Temperature_Char);
  DHT11_Service.addCharacteristic(Humidity_Char);
  BLE.addService(DHT11_Service);
  Temperature_Char.writeValue(0.0f);//float初期値を入れる
  Humidity_Char.writeValue(0.0f);
  BLE.advertise();

  Serial.println("DHT11 Peripheral Started");
  Serial.println("Waiting for Central...");

}

int cnt=1;
void loop() {
  BLEDevice central = BLE.central();
  if (central) {
    Serial.print("Connected: ");
    Serial.println(central.address());//MACアドレス　各Bluetooth機器に固有の値
    while (central.connected()) {

      float h = dht.readHumidity();
      float t = dht.readTemperature();
      if (!isnan(t) && !isnan(h)) {// t と h が正常な値のときだけ送信する
        // BLEへ書き込む（Notify & Read用）
        Temperature_Char.writeValue(t);
        Humidity_Char.writeValue(h);

        // Serial
        Serial.print("Temp: ");
        Serial.print(t, 1);
        Serial.print(" ℃ ");
        Serial.print("Humid: ");
        Serial.print(h, 1);
        Serial.println(" %");

        // LCD
        lcd.setCursor(0, 0);
        lcd.print("                ");
        lcd.setCursor(0, 0);
        lcd.print("Temp=");
        lcd.print(t, 1);
        lcd.print((char)0xDF);//°
        lcd.print("C  ");
        lcd.print(cnt);

        lcd.setCursor(0, 1);
        lcd.print("                ");
        lcd.setCursor(0, 1);
        lcd.print("Humid=");
        lcd.print(h, 1);
        lcd.print("%    ");
      } else {
        Serial.println("DHT read error");
      }
      cnt++;
      delay(1000);  // 1秒に1回更新（DHT11の仕様）
    }

    Serial.println("Disconnected");
  }
}