Update sensors

Hi !

I’ve make teperature monitoring with 3 esp8266 and DHT11. All is working exept update. I need to up temerature for updating on blynk app.
I’m using local server on Pi 0.

  • Pi 0 is not adapted for local server ?
  • Time interval is to little ? ( 250 ms )
  • Something else ?

My sketch :

#define BLYNK_PRINT Serial
#include <SimpleTimer.h>

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DHT.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xx";

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

#define DHTPIN 2          // What digital pin we're connected to

// Uncomment whatever type you're using!
#define DHTTYPE DHT11     // DHT 11
//#define DHTTYPE DHT22   // DHT 22, AM2302, AM2321
//#define DHTTYPE DHT21   // DHT 21, AM2301

BlynkTimer timer;

// 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 h = dht.readHumidity();
  float t = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V14, h);
  Blynk.virtualWrite(V15, t);

void setup()
  // Debug console

  Blynk.begin(auth, ssid, pass, IPAddress(xx), 8080);


  // Setup a function to be called every second
  timer.setInterval(250L, sendSensor);

void loop()

Yes! Search the forum, it has been discussed many many times before.