IoT based Home Automation using ESP RainMaker with Google Assistant Alexa - ESP32 Projects 2025

In this ESP32 project, we’ll build a powerful ESP32-based IoT smart home system using ESP RainMaker, allowing you to control 4 relays via the RainMaker app, Alexa, Google Assistant, and manual switches — I have used all the free tools for this IoT-based home automation system.

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During the ESP Rainmaker tutorial video, I covered the following topics:
00:54 Quick Demo on this ESP32 IoT Project using ESP RainMaker.
03:24 Required Components for this ESP32 project.
03:35 Circuit diagram of ESP32 home automation project.
03:53 Source codes for the ESP Rainmaker ESP32 project.
07:00 Update WiFi details through OTA with ESP Rainmaker.
08:42 Connect ESP Rainmaker with the Amazon Alexa app.
09:26 Connect ESP Rainmaker with the Google Home app.
10:49 Steps to create schedule in the ESP Rainmaker app.

Required Components for the ESP32 home automation system
1. ESP32 Devkit.
2. 4-channel 5V SPDT Relay Module.
3. Switches or Push Buttons.

Amazon India Affiliate links:
ESP32 : https://amzn.to/331pohb
4-channel 5V Relay Module : https://amzn.to/2BQ5Y3o
Echo Dot Alexa(4th Gen) : https://amzn.to/3srCiPA

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Download the Code for the ESP32 IoT project with ESP Rainmaker:
https://iotcircuithub.com/wp-content/...

Download PCB Gerber File of ESP32 control 4 relays:
https://iotcircuithub.com/wp-content/...

Important points:
1. You don't need any Amazon echo device for this IoT Project.
2. You need to install ESP Rainmaker, Google Home, and Amazon Alexa IoT application on mobile.
3. You can control relays from any WiFi network if ESP32 is connected to WiFi.
4. Update the Preference URLs to install the ESP32 board version 2.0.3 as shown in the video.
5. To generate the QR code, press and hold the ESP32 BOOT button for 10 seconds.
6. Please watch the complete video, otherwise you may face some issues.
**Please take proper safety precautions while working with high voltages.

This ESP32 home automation project uses ESP RainMaker to control four relays via the RainMaker mobile app, Alexa, or Google Assistant, all programmed using the Arduino IDE. Each relay is connected to a specific GPIO pin and operates in active LOW mode, allowing it to control appliances like lights or fans. The ESP32 connects to Wi-Fi using BLE provisioning through the ESP RainMaker app, and once connected, the relays can be toggled remotely via cloud or voice commands. Optional manual switches can also be added to control the relays locally, making the system versatile for smart home automation.

#esp32 #homeautomation #esprainmaker

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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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