IoT Smart Home project using ESP32 Blynk control relay with WiFi + Manual Switch - 2021

In this ESP32 project, I have explained how to make an IoT Smart Home project using ESP32 Blynk to control relays with Wi-Fi and manual switch. with this internet of things home automation system, you can also monitor the real-time feedback and control the appliances manually without internet.

Download PCB Gerber file for the ESP32 IoT based home automation project

For this ESP32 project, I have used the FREE plan of the Blynk IoT platform.

During the Blynk IoT tutorial video, I have covered the following topics:
00:35 Required Components for this Blynk ESP32 IoT project.
01:09 Circuit of the ESP32 Home Automation system.
03:00 Program the ESP32 with Arduino IDE
04:21 Set up Blynk cloud account, Web Dashboard.
07:02 Connect ESP32 with Blynk cloud account.
07:59 Setup Blynk IoT application Mobile Dashboard.
09:10 Control relays from Blynk App and switches.

Required Components for this ESP32 home automation system
1. ESP32 DEV KIT V1
2. 8-channel 5V SPDT Relay Module
3. Latched switches or Push Button

Amazon India Affiliate links:

Amazon United States Affiliate links:

Required Components for the Smart Relay Module PCB:
1. Relays 5v (SPDT) (8 no)
2. BC547 Transistors (8 no)
3. PC817 Optocuplors (8 no)
4. 510-ohm 0.25-watt Resistor (8 no)
5. 1k 0.25-watt Resistors (10 no)
6. LED 5-mm (10 no)
7. 1N4007 Diodes (8 no)
8. Push Buttons (8 no)
9. Terminal Connectors
10. Jumper (2 no)
11. 5V DC supply

-------Important points for this ESP32 project:-------
1. After compiling the code, you have to press and hold the BOOT button of ESP32 until the code starts uploading.
2. Install the correct version of the ESP32 board and Blynk library as mentioned in the code.
3. Please take proper safety precautions while working with high voltage.

------------Related Previous Video Links:-------------
Create New Template, DataStreams in Blynk Cloud account

Steps to program ESP32 with Arduino IDE

-----------Codes-----------
Download Code for this Blynk ESP32 control relays from the following article

#smarthome #esp32 #blynk
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[safiyasulthana]

Woahhh👏👏 Bro, Can u please make a base board of this that is ready to be installed behind the switch board because the esp32 or node MCU also need their own power supply I am sort of confused on how to do this without the need to use a charger and connect to the socket.

[rahiasif]

Sir please make home automation without any limitations

[travelexpenses]

Kuch add karo jaise fan controller, seven segment

[palashsenapati]

Great sir 👌👌 , can you add auto option with esp32

[loopfi]

Hi, your project is great. Can you share your pcb drawing schematic? i want to redraw it on altium. can you share the schamatic and pcb file please?

[AAdnaanmtl]

Excellent project sir. If Eeprom and dimmer are added it will be very useful project

[janakpatel]

sir i make this project for 4 switch only its work perfectly but there is some mistake/bug in code that when i switch on all devices either by manual switch or by blynk app after that Wi-Fi is permanently disconnected after that it is required to reset the board

[ivblkud]

This project is amazing but i have a question
When you restart the esp32 board it fetch the data from blynk previous state not manual switches your manual switches are only used to control the relays but esp32 did not save the last state of switches so this project is not helpful for us kindly fix this issue please and thanks for sharing your other projects with us I really appreciate your effort

[smartteg]

Nice project bro, please I need help
I want to use your PCB board can you provide different terminal block to supply esp32 board and change the input header pin to terminal block please 🙏

[SohailKhan-iqwk]

Nice video

Sir I'm using esp32 and 8 channel optacopular relay

But I'm getting lots of errors

But I'm copying all the seps as you told

[oldwizzy]

Have a little question.

Would like to see all this operated via multiple ESP32 modules, that is, I now only see an ESP32 sitting directly on a switch block and sitting directly on a switch block.

Everything is nice and well, that is nice in a test environment like this, the practice is more unruly, let's assume that, do you not think that is a better plan, because here we have nothing in basics, right?

I have to attach that switch block to a separate ESP32 module, because it is somewhere in a central point in a room or several rooms and thus multiple ESP32 modules to make it more difficult, put the ESP32 in MESH switching.
Somewhere else is the other ESP32 with its relay card which controls the lamps and other grut, as above in terms of MESH the multi-chamber principle.

Do you have an idea how to solve that?
Let's assume 2 rooms with 8 relay contacts each!

Old Wizzy, in NL

[balchandpatidar]

thanks sir
yeh project humne banaya full susses hai bahut acha hai.
please ek video esp-01 ki programming 1 channel 30 amp relay ke liye bana dijiye hume room ac ke liye
chahiye please

[skhumbuzocele]

Can you show us, the very circuit.... Just using mosfet instead of the relays, please

[nelsongonzalez]

super excellent proyect thks hello from colombia

[arughana]

Nice project sir, i like your all projects keep it up sir

[phamkhai]

your video is very good, i am a big fan of you, hope you do video bynk 2.0, 8 relay, bluetooth and switch

[rameshwarprasadprasad]

Sir blynk iot app par agr account banate h first time to 8 relay switch ka free plan kitne days ke lea valied hota h

[matthiash.]

Again a super project 👍do you make it still for 3 or 4 relays ?
Also the board to match 🤔

[aravindhanvivekanandhan]

You some project like Water level sensor with dry run protection, motion sensor with LDR door sensor with notification . Full home automation project with all feature make project like series

[yeshpalprasad]

Make a project, on real time monitoring powermeter in load conditions