Project showcase
Room temperature sensor with display on Mobile

Room temperature sensor with display on Mobile © GPL3+

A project that displays the temperature and humidity of a room on your mobile in real time.

  • 30,170 views
  • 9 comments
  • 63 respects

Components and supplies

Apps and online services

About this project


This system connects your hardware to the android device.

A dht11 sensor is used  with arduino uno to sense temperature and humidity of the environment. It sends the value to your android device which is neatly displayed in the app. This system is very easy to build and is useful for real time monitoring off a remote room with an amazing display.


You will need-

  • Arduino Uno
  • Arduino Ethernet Shield
  • Dht11 Sensor
  • Jumper wires*3 (male to female)
  • Arduino IDE
  • Blynk app
  • Lan Cable


The sensor is connected to the digital pin 2 of the arduino. 

Virtual display is created on the app to display the values. The display is updated in real time.




Happy Hacking

Code

Room temperatureArduino
#include <SPI.h>
#define BLYNK_PRINT Serial
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <SimpleTimer.h>
#include <dht11.h>
dht11 DHT11;
SimpleTimer timer;

char auth[] = "";        // write your auth code here
void setup()
{
  DHT11.attach(2);      // connect pin 2 to the sensor
  Serial.begin(9600);
  Blynk.begin(auth);     // start blynk server and connect to the cloud
 while (Blynk.connect() == false) {
    // Wait until connected
  }
  
void loop()
{
  int chk = DHT11.read();
   Blynk.virtualWrite(1, DHT11.temperature);  // Write values to the app
  Blynk.virtualWrite(2, DHT11.humidity);
Serial.println(DHT11.temperature);

  Blynk.run();
  timer.run();
  
}

Schematics

Dht11 Schematic
Dht11

Comments

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