Overview
Things
Story

What is The Object of this Project...
Today i show you how to interface DHT sensor Value in Blynk Apps use NodeMcu8266 . At the End of this tutorial You know about.......

Published June 18, 2018 © CERN-OHL

NodeMcu to DHT Interface in Blynk app| On IOT Platform

Today i show you how to interface DHT sensor Value in Blynk Apps use NodeMcu8266 .

BeginnerFull instructions provided3 hours4,292

NodeMcu to DHT Interface in Blynk app| On IOT Platform

Things used in this project

Hardware components

NodeMcu

DHT11

Jumper Wire

Breadbord

Software apps and online services

Arduino IDE

Blynk

Story

What is The Object of this Project....

Today i show you how to interface DHT sensor Value in Blynk Apps use NodeMcu8266 . At the End of this tutorial You know about........

## You can interface DHT sensor to NodeMcu ## you know how to add DHT library on ardunio board ## You can create a Project use Blynk apps ## you can Uplod program and run Ok Lest Go.................

Requirement Component :

1. NodeMcu

2.DHT11 Sensor

This book will help you to gain more knowledge about this subject:

Arduino, Raspberry Pi, NodeMCU Simple projects in easy way

Step 1!

Interface DHT to NodeMcu following Connection

DHT Sensor -Mechatronicslabrpi

DHT to NodeMcu Connection-Mechatronicslabrpi

NodeMcu to Dht Interface-Mechatronicslabrpi

DHT11 sensor measures and provides humidity and temperature values serially over a single wire.

It can measure relative humidity in percentage (20 to 90% RH) and temperature in degree Celsius in the range of 0 to 50°C.

It has 4 pins; one of which is used for data communication in serial form.

Pulses of different TON and TOFF are decoded as logic 1 or logic 0 or start pulse or end of frame.

More Information on This DataSheet Or Click Here

Step-2! Now You Have to need Download DHT library and Include Ardunio Board Following Instruction

Dht Library add-Mechatronicslabrpi

Step-3!

create a Project use Blynk apps Following Instruction

First LogIn your Blynk App Then Flow the Step By Step

Step1 -Create A New Project

Blink NewProject-Mechatronicslabrpi

Step2- Select Your project name and Board(I Select Name DHT Monitoring System and Bord NodeMcu) then Press Create

Blynk give Name-Mechatronicslabrpi

Step3 -This is vary important Step Hear you got your AUTH TOKEN it send to your email address. Press OK

Blink Auth Token-Mechatronicslabrpi

Step4- Now you can see your Interface like this

Blynk interface -Mechatronicslabrpi

Step5-Now go to Widget Box And select Gauge

Blynk Waidget Box-Mechatronicslabrpi

Step6- After Two Gauge select See like this interface

Blynk Set Gase-Mechatronicslabrpi

Step7- Now Go to Gauge settion and Select the neme, Input, Reading (Hear i select Name Temperature, Humanity Input= V0,V1 and Reading Rate 1 Sec )

Step8- After Given Information show like this

Step9-Now Again go to Widget Box and select SuperChart

Step10- Now go to SuperChat Setting set Name, DataStrme (I Select Name=Temperature & Humanity DataStrm =Temperature , Humanity )go to dataserm setting set input V0 for Temperature V1 for Humanity

1 / 4

App setting Completed

About More information in ardunio board Intoduction to nodemcu8266 & Steps to Import ESP Board Libraries

Now The step of Ardunio IDA Programming Upload Click Here for download Program

NodeMcu ardunio -Mechatronicslabrpi

Final you can see

Final Interface-Mechatronicslabrpi

Code

NodeMcu to DHT Interface in Blynk app| On IOT Platform

#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include "DHT.h"           // including the library of DHT11 temperature and humidity sensor
#include <SimpleTimer.h>   //including the library of SimpleTimer
#define DHTTYPE DHT11      // DHT 11

#define dht_dpin 14
DHT dht(dht_dpin, DHTTYPE); 
SimpleTimer timer;
char auth[] = "8c48fad49b914b789e87bb29742cf6f5";            // You should get Auth Token in the Blynk App.
                                           // Go to the Project Settings (nut icon).

char ssid[] = "..........";    // Your WiFi credentials.
char pass[] = "..........";  // Set password to "" for open networks.
float t;                                   // Declare the variables 
float h;



void setup()
{
    Serial.begin(9600);// Debug console
    Blynk.begin(auth, ssid, pass);
    dht.begin();
    timer.setInterval(2000, sendUptime);
}

void sendUptime()
{
  
  float h = dht.readHumidity();
  float t = dht.readTemperature(); 
  Serial.println("Humidity and temperature\n\n");
  Serial.print("Current humidity = ");
  Serial.print(h);
  Serial.print("%  ");
  Serial.print("temperature = ");
  Serial.print(t); 
  Blynk.virtualWrite(V0, t);
  Blynk.virtualWrite(V1, h);
  
}

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

Credits

sarful

59 projects • 44 followers

I am Sarful , I am a Mechatronics Engineer & also a teacher I am Interested in the evolution of technology in the automation industry .

Thanks to Sarful .

NodeMcu to DHT Interface in Blynk app| On IOT Platform