#define BLYNK_TEMPLATE_ID "TMPL6rXFkGk3i"
#define BLYNK_TEMPLATE_NAME "blink2"
#define BLYNK_AUTH_TOKEN "Ym36Z32cBOa8VOq4GscnW9k3cW0gXsys"
#define BLYNK_PRINT Serial

#define BlynkTemp V1
#define BlynkHumi V2
#define BlynkTerminal V0

#define Red_LED   5
#define Blue_LED  4



#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHTesp.h>
#include <LiquidCrystal_I2C.h>

WidgetTerminal terminal(BlynkTerminal);

int dhtPin = 21;
bool led_blink = false;
bool led_state = false;
int lcd_SDA = 2;
int lcd_SCL = 15;
String cmdStr = "";

BlynkTimer timer; 
BlynkTimer BlinkLedTimer;

DHTesp dht;
LiquidCrystal_I2C lcd(0x27, 20, 4);


char auth[] = "Ym36Z32cBOa8VOq4GscnW9k3cW0gXsys";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup() {
  pinMode(4, OUTPUT);
  pinMode(5,OUTPUT);
  Serial.begin(115200);

  Wire.begin(lcd_SDA, lcd_SCL);
  lcd.init();
  lcd.backlight();
  lcd.print("Hello World");


  dht.setup(dhtPin,DHTesp::DHT22);
  timer.setInterval(500L,readDHT);
  BlinkLedTimer.setInterval(500L, BlinkLed);
  Blynk.begin(auth,ssid,pass,"blynk.cloud",80);
}

void loop() {
  timer.run(); 
  BlinkLedTimer.run();
  Blynk.run();
}

void readDHT() {
  TempAndHumidity values = dht.getTempAndHumidity();
  Blynk.virtualWrite(BlynkTemp, values.temperature);
  Blynk.virtualWrite(BlynkHumi, values.humidity);
  lcd.clear();
  lcd.print(cmdStr);
}

void BlinkLed() {
  if(led_blink) {
    digitalWrite(Red_LED, led_state);
    led_state = !led_state;
  }
  
  }


BLYNK_WRITE(BlynkTerminal) {
  String cmd = param.asStr();
  cmdStr = cmd;
  //readDHT();
  
  if(cmd == "red on") digitalWrite(Red_LED, HIGH);
  else if(cmd == "red off") {
    led_blink = false;
    digitalWrite(Red_LED, LOW);
  }
  else if(cmd == "blink red") led_blink = true;
  else if(cmd == "blink red off") led_blink = false;
 
  else if(cmd == "blue on") digitalWrite(Blue_LED, HIGH);
  else if(cmd == "blue off") digitalWrite(Blue_LED, LOW);

  else if(cmd == "both on") {
    digitalWrite(Blue_LED, HIGH);
    digitalWrite(Red_LED, HIGH);
  }
  else if(cmd == "both off") {
    digitalWrite(Red_LED, LOW);
    digitalWrite(Blue_LED, LOW);
  }
  else terminal.println("Invalid command");
  
}