Problems mith Numeric Input

Need Help With My Project
1

Hi Blynkers,

I want to use the Numeric Input (V4) in void sendSensor(), how can i do this or why doent it work?

#define BLYNK_PRINT Serial
#include <SimpleDHT.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
int pinDHT22 = D4;
SimpleDHT22 dht22;


char auth[] = "c9f29bf559e343bbbac12bb0ad6ad2ed";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Kaffee7490";
char pass[] = "83270062622472273261";


WidgetLED led1(V0);
WidgetLED led2(V1);
WidgetLED led3(V7);
BlynkTimer timer;

BLYNK_WRITE(V3) {

int Zeit = param.asInt();
  if (Zeit == 1)
  {
  led1.on();
  led2.off();
    
  }
  else
  {led2.on();
  led1.off();
  
  }

}
BLYNK_WRITE(V4)
{  
  Boxtemperatur = param.asFloat();   
}

 void sendSensor()
{
  float temperature = 0;
  float humidity = 0;
  int err = SimpleDHTErrSuccess;
  if ((err = dht22.read2(pinDHT22, &temperature, &humidity, NULL)) != SimpleDHTErrSuccess) {
    Serial.print("Read DHT22 failed, err="); Serial.println(err); delay(2000);
    return;
    
  }
   Serial.print(Boxtemperatur);
   Serial.println(temperature);
   Blynk.virtualWrite(V2, temperature);

   

  if (temperature < Boxtemperatur)
  {led3.on();}
  else
  {led3.off();}
 
  

}

void setup()
{
  // Debug console
  Serial.begin(9600);
  timer.setInterval(2000L, sendSensor);
  Blynk.begin(auth, ssid, pass);
  
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);

  

  // Setup a function to be called every second

}

void loop()
{
  Blynk.run();
  timer.run();
}
2

I don’t see any float Boxtemperatur declaration.

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