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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.

$2 for 1-4 Layer PCBs, Get SMT Coupons:

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

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:
ESP32 DEV KIT V1 :
8-channel 5V Relay Module :

Amazon India Affiliate links:
ESP32 DEV KIT V1 :
8-channel 5V Relay Module :
Echo Dot Alexa(4th Gen) :

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.
4. If you face any issue related to Espalexa library, then please visit
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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Other useful IoT projects:

Latest ESP32 projects playlist:

Latest NodeMCU projects playlist:

ESP32 Home automation with Google Assistant Alexa & Manual Switches

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