Smart Home with Amazon Alexa using ESP32 control Relay (Voice + IR Remote) | IoT Projects 2021

In this IoT projects, I have shown how to make the Smart Home with Amazon Alexa using ESP32 control Relays to control appliances with voice commands, IR Remote, and switches with and without Wi-Fi. You can also monitor the real-time feedback in the Amazon Alexa app when you control the relays from IR remote and switches.

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

Visit the following website to get electronics components, modules at a very reasonable price

During the ESP32 tutorial video, I have covered all the following topics:
00:29 How to control 8 relays using ESP32 with Amazon Alexa App.
00:47 Control relay with IR remote and switches.
01:32 Control ESP32 Home automation without internet.
02:34 Required components for ESP32 Alexa Home automation.
02:58 Circuit diagram of the ESP32 IoT projects.
05:08 How to get IR codes (HEX codes) from a remote
06:00 Program ESP32 with Arduino IDE
07:08 Add IoT devices & ESP32 with Amazon Alexa App.
08:11 Control appliances with voice and switches using the ESP32 control relays.

Required Components for this ESP32 Smart Home system
1. ESP32 DEV KIT V1
2. 8-channel 5V SPDT Relay Module
3. Switches or Push-Buttons
4. Any IR remote
5. Amazon Alexa Echo Dot or any Alexa Devices.

Amazon United States Affiliate links:

Amazon India Affiliate links:

Required Components for the ESP32 control 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) (R1 -- R8)
5. 1k 0.25-watt Resistors (10 no) (R9 -- R18)
6. LED 5-mm (10 no)
7. 1N4007 Diodes (8 no) (D1 -- D8)
8. Push Buttons (8 no)
9. Terminal Connectors
10. 5V DC supply

Important points for this internet of things projects:
1. The IR receiver sensor must have a metallic casing. Otherwise, you may face issues while trying to get the Hex code.
2. You need an Echo Dot or any other Alexa devices for this project.
3. The ESP32 and the echo dot smart speaker should be connected with the same wifi network.
5. Use a stable 5V 5A DC power supply.

Download Codes for this ESP32 Alexa smart Home project from the following article

Previous Video on Alexa smart home:
ESP32 Alexa control relay without Alexa Echo dot

ESP8266 Alexa control relay without Alexa Echo dot

During the video, I have explained the circuit and code for the ESP32 IoT projects. And I have not used any paid IoT platform for this ESP32 project. So after watching the complete tutorial video you can easily make this ESP32 Alexa smart home project.

If you face any issues please let me know in the comment section.

#homeautomation #alexa #esp32
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ESP32 Home automation with Google Assistant Alexa & Manual Switches

[rameshniroj]

Adding IR control is awesome work
👌👌👌👌👌

[rameshniroj]

Awesome Work,
Please Add GOOGLE ASSISTANCE + BLINK APP TO 8 RELAY MODULE
PLEASE SIR ❤️ 🙏🙏🙏

[jobinjoseph]

Hi can we read an analogue value at the esp pin and relay it to alexa interface. Value to display eg: room temperature, automation based on conditional switching of output based on the value read at esp pins?

[samiranDuttavlogz]

your project is Awesome!! I have a question.. Can I use ttp223 touch sensor instead of manual switch .. ? I am waiting hear from you!! Please reply ASAP!!

[romolopermadi]

hi min, any video using google home or google home mini to control it?? please share if have,

[gianpic]

Hello Subhajit
first of all, congratulations for the projects you develop and share.
Having developed and prototyped pcb of similar projects, I wanted to ask you what software you use for the creation of pcbs.
I wanted to start from yours, done very well, and modify it to add a section in which to insert the Power Supply Module Hi-Link HLK-PM01 AC-DC 220 V to 5 V, you can share the starting file, not the gerber, to allow me this change?
Obviously I would share the work done again
Thank you

[ankitshah]

Nice project... So can you make it using alexa and Bluetooth app

[dipaksonone]

Getting error 'class WIFICLASS' has no member named 'mode' help me sir... please

[mdsiyam]

I don't have an Echo with can i do

[robinarackal]

How about the power supply of really board and esp32 .... It working properly .. but the problem is power supply is very big I choose 5 v.10 amp. Power supply it doesn't fit inside the metal box ..is there any idea to solve the problem .. please mention the accurate power supply for the boards

[marathiman]

Its really amazing and thanks to share all this very helpful things with us. Can we do same thing with sinric pro.

[jeelramani]

Kya ye mai daily use karsakte hu means ye bigad nahi jaega na?

[rhodiumindia]

Programming the ESP but Alexa app not found it. I try searching in 10 time sir please help me why it problem.

[vardhamanmohan]

How can i flash my esp showing error like size reduse sketch code error

[debrajsaha]

Can we add google assistant without sinric or ifttt?

[noushadolakara]

Hi dear good product now every errors are solved except after 24 hours the wifi led is getting offline , then we need it restart, after restarting it it works again 24 hours
any way good
thank you

[jituicechill]

"Cannot connect to wifi. So manual mode" their is a bug here if initally we dont conntct it to wifi we cannot use the manual mode.
If used the IR remote button program crashes with an error
Guru Meditation Error : Core 1 panic'ed (loadProhibited)

Any solution???
Thankyou 😀

[AdnanShaikh-wwpp]

ESP_RMAKER_PARAM_RANGE was not declare in this scope error 😭😭?

[r.pranay]

I think there is no difference between code for buttons and code for switches.so can we upload any 1 of them for both?

[Zerous_]

Can this project be upgraded to use the EEPROM on the pin state?