Home Automation System with ESP32 Google Assistant
Table of Contents
- Introduction
- Project Overview
- Controlling Appliances with Google Assistant
- Controlling Appliances with Blynk IoT App
- Using Manual Switches and IR Remote
- Real-Time Feedback on Blynk IoT App
- Automation with Temperature Sensor
- Automation with Time Schedule
- PCB Design and Assembly
- Configuring Blynk IoT Platform
- Programming the ESP32
- Testing and Final Assembly
- Connecting Blynk IoT Platform with Google Assistant
- Conclusion
Introduction
Welcome to Tech StudyCell! In this video, we will be showcasing a true home automation system that allows You to control your appliances using sensor output and a predefined time schedule. We have also integrated Google Assistant with this Blynk project to provide voice control functionality. Throughout this article, we will explain the different aspects of this project, including how to control appliances, set up automation, design a custom PCB, configure the Blynk IoT platform, program the ESP32 microcontroller, and more.
Project Overview
Our home automation system combines various technologies to Create a seamless and convenient experience. By utilizing the Blynk IoT app, you can control appliances not only through voice commands using Google Assistant but also through manual switches, an IR remote, and the Blynk app itself. Real-time feedback on the app allows you to monitor the status of the appliances. The system also features automation capabilities, allowing you to set up actions Based on temperature readings from a DHT11 sensor and predefined time schedules.
Controlling Appliances with Google Assistant
One of the main highlights of our home automation system is the integration with Google Assistant. Through voice commands, you can easily control specific appliances. For example, saying "Hey Google, turn on study lamp" or "Hey Google, turn on room light" will activate the corresponding appliances. Integration with Google Assistant provides a hands-free and intuitive way to control your home devices.
Controlling Appliances with Blynk IoT App
In addition to voice control, you can also manage your appliances through the Blynk IoT app. This app allows you to perform functions such as turning on and off individual appliances, as well as controlling multiple lamps together using a single button. The app provides a user-friendly interface to Interact with your home automation system, making it easy to customize and control the devices.
Using Manual Switches and IR Remote
Apart from voice and app control, our home automation system also supports manual switches and an IR remote. This means you can still use traditional methods to turn on and off the lamps. The manual switches provide a physical way to control the appliances, while the IR remote allows you to control the lamps from a distance. These options ensure flexibility and convenience for all users.
Real-Time Feedback on Blynk IoT App
To keep track of the status of your appliances, the Blynk IoT app provides real-time feedback. This means you can monitor the Current state of the lamps, whether they are on or off, directly on your smartphone or tablet. The app displays the information in a user-friendly manner, allowing you to easily check the status and make adjustments as needed.
Automation with Temperature Sensor
Our home automation system incorporates a DHT11 temperature sensor to enable automation based on temperature readings. The system is programmed to react according to predefined thresholds. For example, when the temperature exceeds a certain value, the automation will trigger the third relay to turn on. Similarly, when the temperature drops below a certain value, the third relay will automatically turn off. This feature ensures that the appliances are controlled based on the ambient temperature, optimizing efficiency and convenience.
Automation with Time Schedule
In addition to temperature-based automation, our system allows you to set up actions based on a predefined time schedule. For instance, you can schedule the fourth relay to turn on every day at 7 p.m. This automation is not reliant on temperature readings but rather operates solely on the specified time. The flexibility to create custom schedules ensures that your appliances are controlled according to your specific needs and preferences.
PCB Design and Assembly
To enhance the functionality and aesthetics of our home automation system, we have designed a custom PCB (Printed Circuit Board). This PCB allows for a more compact and organized circuit setup. We have used the free PCB assembly service from jlcpcb to solder the components onto the PCB. Additionally, we provide detailed instructions on how to order the PCB and assemble the components, making it easy for anyone to replicate the project.
Configuring Blynk IoT Platform
To utilize the Blynk IoT platform, you need to configure it according to your project requirements. We guide you through the process, starting with creating a new Blynk template specifically for our home automation system. We demonstrate how to set up datastreams for controlling the relays and monitoring the temperature and humidity readings. Furthermore, we explain how to create a web dashboard to Visualize the data and control the devices remotely.
Programming the ESP32
The ESP32 microcontroller plays a vital role in our home automation system as it serves as the central hub for controlling the devices and interacting with the Blynk IoT platform. We provide the complete source code for the ESP32, along with instructions on how to upload and modify the code. We cover topics such as obtaining the IR remote hex codes, configuring the Blynk credentials, connecting to Wi-Fi, and implementing the desired functionalities.
Testing and Final Assembly
Once the individual components are ready, it's time to test and assemble them into a fully functional home automation system. We guide you through the testing process to ensure that everything is working as expected. We demonstrate how to connect the appliances to the relays and how to verify the automation features. Finally, we provide instructions on how to secure the circuit components and neatly organize the wiring for a professional-looking final assembly.
Connecting Blynk IoT Platform with Google Assistant
To enable control of your home automation system using Google Assistant, we leverage the power of IFTTT (If This, Then That). We Show you how to set up applets in IFTTT that connect your Blynk IoT platform with Google Assistant. This integration allows you to control your appliances through voice commands. We explain the necessary steps and provide the required API syntax for a seamless integration process.
Conclusion
In conclusion, our home automation system provides a comprehensive solution to control and automate your appliances using various methods. From voice commands with Google Assistant to manual switches and the Blynk IoT app, you have a range of options to interact with your devices. With automation features based on temperature and time, your appliances can adapt to different scenarios without constant manual intervention. The PCB design enhances the overall functionality and aesthetics of the system. By following our instructions, you can build your own version of this home automation system and experience the convenience and efficiency it offers.