Make an IoT based Temperature Level Indicator using LEDs and DHT11 Module with ESP8266-12e Wi-Fi Board compatible with Arduino Uno - KT569

INTRODUCTION

In this project, we will design an IOT-based temperature level indicator using a DHT11 Temperature and humidity sensor module and an LED in which the Temperature level will be shown on the LED according to the Temperature value.

HARDWARE REQUIRED

• Node MCU (esp82 66-12e v1.0) Wi-Fi Board -1pc
• NodeMcu USB Cable - 1pc
• DHT11 Module -1pc
• Jumper Wires (male to male) – 20 pcs
• 830 pt. Breadboard - 1pc
• Led 5mm-3pcs

SOFTWARE REQUIRED

Arduino IDE 1.8.10 (programmable platform for Arduino)

Click here to download the software

SPECIFICATIONS

NodeMCU ESP8266 CP2102 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

LIBRARY REQUIRED

• DHT11 - Click to open 👈
• Adafruit Sensor Library - Click to open 👈

CIRCUIT CONNECTION

• Connect the “S” pin of the DHT11 module to pin D5 of the NodeMCU ESP8266-12e board.
• Connect the “V” pin of the DHT11 module to the pin 3v3 NodeMCU ESP8266-12e board.
• Connect the ground pin of the DHT11 module to the ground pin of the NodeMCU ESP8266-12e board.
• Connect the positive leg of LED1 to the D8 pin of NodeMCU ESP8266-12e board.
• Connect the positive leg of LED2 to the D7 pin of NodeMCU ESP8266-12e board.
• Connect the positive leg of LED3 to the D6 pin of NodeMCU ESP8266-12e board.
• Connect the GND leg of all LEDs to the GND rail on the breadboard.

CODE

Click to open in Drive

WORKING AND OUTPUT

Welcome to the Node MCU-based project.

• As the 3 LED are connected, the first LED will get ON when the temperature rises greater than 20.
• The 2nd LED will get ON when the temperature is between 20 to 27.
• The 3rd LED will get ON when the temperature rises more than 29. And the Buzzer get ON indicates “TOO HOT”.

DOCUMENT

KT569 - Click to open👈