/* Fill-in information from Blynk Device Info here */
/* Template ID、Template Name、Auth Token 一定要放在程式的最前面 */
#define BLYNK_TEMPLATE_ID           ""
#define BLYNK_TEMPLATE_NAME         "ESP32LED"
#define BLYNK_AUTH_TOKEN            ""

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial
#define Disp

#if defined(ESP32)
  #include <WiFi.h>
  #include <WiFiClient.h>
  #include <BlynkSimpleEsp32.h>
#elif defined(ESP8266)
  #include <ESP8266WiFi.h>
  #include <BlynkSimpleEsp8266.h>
#else
  #warning "Board not support"
#endif

#if defined(Disp)
  #include <Wire.h>
  #include <Adafruit_GFX.h>
  #include <Adafruit_SSD1306.h> // 匯入OLED程式庫
#endif

#define SCREEN_WIDTH 128 // OLED width,  in pixels
#define SCREEN_HEIGHT 64 // OLED height, in pixels

#define LED1_PIN 4
#define LED2_PIN 2

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
 
#if defined(Disp)
  // Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
  Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
#endif

float humidity=0; // 宣告一個資料型態為float的全域變數humidity
float temperature=0;  // 宣告一個資料型態為float的全域變數temperature
BlynkTimer timer;
WidgetLED led1(V1);

void sendSensor();
BLYNK_WRITE(V0);
BLYNK_WRITE(V1);
void blinkLedWidget();

void setup(void) {
  pinMode(LED1_PIN,OUTPUT);
  pinMode(LED2_PIN,OUTPUT);

  // Debug console
  Serial.begin(115200);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

#if defined(Disp)
  // initialize OLED display with I2C address 0x3C
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 OLED"));
    while (1);
  }
#endif

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  // You can also specify server:
  //Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass, "blynk-cloud.com", 80);
  //Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass, IPAddress(192,168,1,100), 8080);

  // Setup a function to be called every second
  timer.setInterval(1000L, sendSensor);
  // timer.setInterval(1000L, blinkLedWidget);

  Serial.println("Start BLYNK");
  for(int i=0;i<3;i++)
  {
    digitalWrite(LED1_PIN,HIGH);
    delay(1000);
    digitalWrite(LED1_PIN,LOW);
    delay(1000);
  }
}

void loop(void) {
  Blynk.run();  // 執行Blynk
  timer.run();  // 執行BlynkTimer計時器

  String StringT = "T:"+String(temperature)+"*C";
  String StringH = "H:"+String(humidity)+"%";

#if defined(Disp)
  oled.clearDisplay(); // clear display
  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 0); // x=0,y=0位置顯示溫度的值
  oled.println(StringT);
  oled.setCursor(0, 16); // x=0,y=16位置顯示濕度的值
  oled.println(StringH);
  oled.display();  //螢幕顯示畫面
#endif
}

BLYNK_WRITE(V0)
{
  int pinValue = param.asInt(); // Get value as integer
  if (pinValue == 1) {
    digitalWrite(LED1_PIN,HIGH);
    Serial.println("LED1 on V1: off");
  } else {
    digitalWrite(LED1_PIN,LOW);
    Serial.println("LED1 on V1: on");
  }
}

BLYNK_WRITE(V1)
{
  int pinValue = param.asInt(); // Get value as integer
  if (pinValue == 1) {
    digitalWrite(LED2_PIN,HIGH);
    Serial.println("LED2 on V1: off");
  } else {
    digitalWrite(LED2_PIN,LOW);
    Serial.println("LED2 on V1: on");
  }
}

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void sendSensor() {

  // float humidity = dht.readHumidity();
  // float temperature = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit
  humidity = random(100);
  temperature = random(50);

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V5, humidity);
  Blynk.virtualWrite(V6, temperature);
}

// V1 LED Widget is blinking
void blinkLedWidget()
{
 if (led1.getValue()) {
   led1.off();
   Serial.println("LED on V1: off");
 } else {
   led1.on();
   Serial.println("LED on V1: on");
 }
}