Esp8266 Projects

DHT22 Sensor With Nodemcu and Blynk


In this project, we will build a Weather Monitoring System Using The DHT22 Sensor ESP8266 and New Blynk App. We will use the Arduino IDE Software for Programming. it’s a great way to build your own small weathering system.

In this project, I published the DHT22 Sensor Data to the new Blynk app platform. you just see the reading anywhere in the world, I will explain all Process how you make your own wireless weathering System.

Bill Of Materials




Link To Buy





DHT22 Sensor



I2C Module



16x2 LCD Display



10k Pot



Zero PCB



NodeMCU V3 1024x721 1

  •  ESP8266 Based On, integrates GPIO, PWM, IIC, 1-Wire and ADC all in one board.
  • ESP8266 Power your development in the fastest way in combination with NodeMCU Firmware!
  • USB-TTL included plug&play 10 GPIO, every GPIO can be PWM, I2C, 1-wire

DHT22 Sensor

Screenshot 2022 12 18 at 9.16.52 PM e1671379033103

DHT22 Sensor Measuring the temperature And Humidity. the accuracy is relay good for comparison To the DHT11 Sensor and the operating voltage Is 3.3v to 5v.

  • Supply voltage: 5V
  • Temperature range:-40-80℃ resolution0.1℃ error <±0.5℃
  • Humidity range:0-100%RH resolution0.1%RH error±2%RH
  • The sequence of the line: VCC, GND, S
  • Size: 38 x 20mm

16×2 LCD Display

16x2 Lcd Display
16×2 Lcd Display

This one the liquid crystal display is 2 Row And 16 cloum And the Operting Voltage Is 5v Dc.

is Also suported the 4 Wire conection i mean I2C Through

  • SDA – Serial Data
  • SCL – Serial Clock
  • VCC – 5v
  • GND – Ground

Circuit Diagram

Screenshot 2022 12 24 at 9.21.42 PM

PCB Design

Screenshot 2022 12 24 at 9.21.24 PM

Screenshot 2022 12 24 at 9.21.12 PM

Blynk App Setup

Now, Let’s Set up the blink web dashboard. for that, follow all steps

just go to google and type Blynk App and go to the Website Blynk Web

First, go to the Blynk website and create a new account using the Gmail Address. and then log in to your account and create a new template for this project.

Screenshot 2022 07 19 at 11.59.21 PM

After Signing up just log in to the blink web page and create your own Dashboard.

Blynk app

I Have Created it as a “Wifi Truck” And Next Select the hardware type ESP8266

Screenshot 2022 12 24 at 8.43.41 PM

Now You just created the Gauge and label

DHT22 Sensor3                              DHT22 Sensor2


Screenshot 2022 12 24 at 9.27.06 PM

Screenshot 2022 12 24 at 9.27.44 PM

DHT22 Sensor1

Source Code

Before Uploading The Code You Just Change these things

After changing the Auth, SSID and password then you Upload the code to NodeMCU Controller


Demo Of Projects

I will upload the code and After a Few seconds wifi is connected and you salo see in the 16×2 LCD Display is showing the Temperature And Humidity

IMG 2228

The Same Data will display in LCD And Mobile applications, Here I just used two gauges first will show the Temapture And the Second will show the Humidity.

IMG 2236

The same data will display on Blynk App Webpage like Temapture And Humidity

IMG 2242

IMG 2237 scaled e1671898901625

Video tutorial


If You Interested to see more Blog about Related The ESP8266


Hi, Prateek Here I’m interested in Electronics That's why I Make Soo Many Projects, I’m currently Pursuing M Tech.. if you Relay Like To My Blog Plz Comment Below...Thanks To All Electronics Lover...❤️

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