i cant rectify this error i have tried multiple way but i dont know to clear kindly guide
here is my code
#include <LiquidCrystal_I2C.h>
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DHT.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
char auth[] = "VMC281MzkiQa3OxZ62U-56i";//Enter your Auth token
char ssid[] = "D-Link-vimal";//Enter your WIFI name
char pass[] = "ypkrex8dxx";//Enter your WIFI password
DHT dht(D4, DHT11); //(sensor pin,sensor type)
BlynkTimer timer;
bool pirbutton = 0;
#define Buzzer 10
#define MQ2 A0
#define flame D0
#define PIR D3
#define trig D5
#define echo D6
#define relay1 D7
#define relay2 D8
BLYNK_WRITE(V0) {
pirbutton = param.asInt();
}
void setup() {
Serial.begin(9600);
lcd.init();
lcd.backlight();
pinMode(Buzzer, OUTPUT);
pinMode(flame, INPUT);
pinMode(PIR, INPUT);
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
digitalWrite(relay1, HIGH);
digitalWrite(relay2, HIGH);
Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
dht.begin();
lcd.setCursor(0, 0);
lcd.print(" Initializing ");
for (int a = 5; a <= 10; a++)
{
lcd.setCursor(a, 1);
lcd.print(".");
delay(500);
}
lcd.clear();
timer.setInterval(100L, gassensor);
timer.setInterval(100L, DHT11sensor);
timer.setInterval(100L, flamesensor);
timer.setInterval(100L, pirsensor);
timer.setInterval(100L, ultrasonic);
return;
}
//mq sensor
void gassensor()
{
int value = analogRead(MQ2);
Serial.println(value);
value = map(value, 0, 1024, 0, 100);
if (value <= 35)
{
digitalWrite(Buzzer, LOW);
} else if (value > 35)
{
Blynk.logEvent("GAS DEDECTOR","Warning! Gas leak detected");
digitalWrite(Buzzer, HIGH);
}
Blynk.virtualWrite(V1, value);
lcd.setCursor(9, 0);
lcd.print("G :");
lcd.print(value);
lcd.print(" ");
}
//Get the DHT11 sensor values
void DHT11sensor() {
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
Blynk.virtualWrite(V2, t);
Blynk.virtualWrite(V3, h);
lcd.setCursor(0, 0);
lcd.print("T :");
lcd.print(t);
lcd.setCursor(0, 1);
lcd.print("H :");
lcd.print(h);
}
//flame sensor
void flamesensor()
{
bool value = digitalRead(flame );
if (value == 1)
{
digitalWrite(Buzzer, LOW);
} else if (value == 0)
{
Blynk.logEvent("FIRE", "Warning! Fire was detected");
digitalWrite(Buzzer, HIGH);
}
}
//pir sensor
void pirsensor()
{
bool value = digitalRead(PIR);
if (pirbutton == 1)
{
if (value == 0)
{
digitalWrite(Buzzer, LOW);
} else if (value == 1)
{
Blynk.logEvent("CHECK", "Warning! Please check your security system");
digitalWrite(Buzzer, HIGH);
}
}
}
//ultrasonic sensor
void ultrasonic() {
digitalWrite(trig, LOW);
delayMicroseconds(4);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
long t = pulseIn(echo, HIGH);
long cm = t / 29 / 2;
Blynk.virtualWrite(V4, cm);
lcd.setCursor(9, 1);
lcd.print("W :");
lcd.print(cm);
lcd.print(" ");
}
void loop() {
Blynk.run();
timer.run();
}