IoT based projects for final year using NodeMCU ESP8266 Blynk with Sensor - Smart Home 2022

In this smart home project, I have shown how to make a NodeMCU ESP8266 IoT-based project for the final year using Blynk IoT with sensor and IR remote control relay. The ESP8266 can save the last GPIO state and you can also control relays without internet from IR remote and manual switches.

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For this home automation project, I have used the FREE plan of the Blynk IoT platform and explained all the steps to use the Preferences library to save the last GPIO state in the ESP8266 flash memory.

During this Internet of things tutorial video, I have covered the following topics:
00:09 Quick demo for this NodeMCU Blynk IoT Project using sensor.
00:52 Timer & Temperature control relay with Blynk Automations.
02:27 Required Components for the Blynk ESP8266 project.
02:39 Circuit of the NodeMCU ESP8266 control relays.
03:05 Set up Blynk IoT cloud for ESP8266.
03:47 Add devices in the Blynk IoT cloud.
04:08 Source Codes for Blynk ESP8266 smart home project.
05:57 Steps to use Preferences library for ESP8266 Project.
08:38 Set up Blynk IoT App to control relays.

Required Components for the ESP8266 internet of things project.
1. NodeMCU ESP8266
2. 4-channel 5V SPDT Relay Module
3. TSOP1838 IR receiver (with metallic casing)
4. DHT11 temperature sensor
5. Switches or pushbuttons

Amazon India Affiliate links:
NodeMCU ESP8266: amzn.to/3fJA4EG
4-channel 5V Relay Module: amzn.to/2BQ5Y3o

Amazon United States Affiliate links:
NodeMCU ESP8266: amzn.to/2WoR2A2
4-channel 5V Relay Module: amzn.to/3r2HuJ4

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Download the Code for the ESP8266 Blynk IoT project:
iotcircuithub.com/wp-content/uploads/2022/09/Code_…

Previous Videos:
Previous Blynk NodeMCU Project:    • ESP8266 Project using Blynk Google As...  
Create Blynk Template for Automation:    • IoT Project using ESP32 Google Assist...  
Blynk IFTTT Google Assistant:    • ESP8266 Project using Blynk IFTTT and...  
Steps to program NodeMCU with Arduino IDE:    • Programming NodeMCU ESP8266 & ESP32 w...  

Important Links:
New Blynk IoT Cloud: blynk.cloud/dashboard/register
Preferences library tutorial: iotcircuithub.com/esp32-preferences-library-tutori…

Download PCB Gerber file for NodeMCU control relays
drive.google.com/uc?export=download&id=1Jx4D_DSV_e…

Important points:
1. You can turn ON/OFF the automation anytime from the Blynk IoT app.
2. IR receiver sensor must have a metallic casing. Otherwise, you may face issues while trying to get the Hex code.
3. The Blynk Automation will not work if the NodeMCU is not connected to WiFi
4. You can control relays with switches & IR remote if WiFi is not available.
5. Install the correct version of the ESP8266 board and libraries as mentioned in the code.
6. If you use latched switch, then during reset, switch-2 (D3) must be turned OFF.
7. Please watch the complete video, otherwise you may face some issues.
**Please take proper safety precautions while working with high voltages.

For this final year IoT project tutorial, I used one of my previous NodeMCU projects and added EEPROM features using the Preferences library.
In this NodeMCU project, I have explained all the steps to use the Preferences library for any ESP8266 Project.
You can control the relays without internet from the IR remote and manual switches. NodeMCU will automatically connect with the Blynk cloud when the internet comes back.
You can use any IR remote to control the relays, just get the HEX codes of unused IR remote buttons, and control the appliances with those buttons.

This smart relay module PCB can be used for different ESP8266 projects which I will cover in upcoming videos.

#iotprojects #esp8266 #smarthome
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WARNING:
This video is for demonstration and educational purposes only.
Each demonstration presents risks and hazards that must be fully understood before attempting.
And should be performed only by professionals
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