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Measure Temperature and Humidity using DHT11 & ESP8266-12E using Blynk IOT application - KT573

Measure Temperature and Humidity using DHT11 & ESP8266-12E using Blynk IOT application - KT573

KT573

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Kit Includes


Introduction

In this project, we have used to design an IOT based temperature and Humidity using Node MCU and DHT11 by interfacing with the BLYNK application.

HARDWARE REQUIRED

SOFTWARE REQUIRED

Arduino IDE 1.8.10 (programmable platform for Arduino)

Click To Download: https://www.arduino.cc/en/Main/Software

SPECIFICATIONS

NodeMCU ESP8266 CP2102 NodeMCU WIFI Serial Wireless Module

  • ESP8266 CP2102 NodeMCU LUA ESP-12E WIFI Serial Wireless Module
  • Built-in Micro-USB, with flash and reset switches, easy to program
  • Full I/O port and Wireless 802.11 supported, direct download no need to reset
  • Arduino compatible works great with the latest Arduino IDE/Mongoose IoT/Micro python


DHT11 Module

  • Operating Voltage: 3.5V to 5.5V
  • Operating current: 0.3mA (measuring) 60uA (standby)
  • Output: Serial data
  • Temperature Range: 0°C to 50°C
  • Humidity Range: 20% to 90%
  • Resolution: Temperature and Humidity both are 16-bit
  • Accuracy: ±1°C and ±1%

1

Vcc

Power supply 3.5V to 5.5V

2

Data

Outputs both Temperature and Humidity through serial Data

3

Ground

Connected to the ground of the circuit

APPLICATION REQUIRED

BLYNK

Download from Google play store and Apple Store

CIRCUIT CONNECTION

  • Connect DHT11 “S” pin to node MCU pin D4
  • Connect DHT11 “V” pin to node MCU pin 3v3.
  • Connect DHT11 ground to node MCU ground.

CODE

Click to see the code

https://drive.google.com/open?id=1fFfMQ8t0hYgksC7A3935421xTWG6EAMq

Must mention your correct Wi-Fi ID and Password in the code

WORKING AND OUTPUT

Welcome to the Node MCU Based project.

To connect with Blynk Application. First, you need to create a new project An AUTH token will be sent to your registered Email ID which you need to note down. You need to insert the key in the given code.

Open the Widget Box and select the Labeled value widget option from the Dropdown list

  • Click on the plus icon and select Labelled value for temperature.
  • Define the pins in our case V5.
  • Change the min to 0 Max to 50.
  • Now again click the icon and select Labelled value for Humidity and change the max 100%. And define the pin in our case V6.
  • Now click on the play button and you will get temperature and humidity.
  • The output will shown as Humidity and Temperature in the figure below.

Click to watch the tutorial

For more tutorials subscribe our channel REES52 on YouTube

https://www.youtube.com/channel/UCKuJ1KCjJGat7PrdAcWtu5g