Voice-control interface has been transforming the way we interact with technology. Among the many places this technology has impacted, the personal home experience profoundly stands out. One of the recent incarnations of this technology is the Smart Mirror—a sophisticated combination of a traditional mirror with an interactive display. Just imagine waking up every morning and asking your mirror for the weather update, a to-do list, or your health stats. Such interaction is no longer a fairytale thanks to the integration of voice-control with smart mirrors. This article provides a comprehensive guide on setting up a voice-control interface for your Smart Mirror DIY.
The bedrock of voice-control technology is a group of software applications known as voice assistants. Voice assistants like Google Assistant, Amazon Alexa, and Apple’s Siri are popular examples. For an effective DIY experience, we will focus on Google Assistant due to its compatibility breadth and simplicity. Google Assistant has a software development kit (SDK) that can run on any device, operating system, or platform.
The first step in turning your mirror into a Smart Mirror is to set up the hardware. This comprises of a Raspberry Pi model, a monitor with HDMI capabilities, a microphone, speakers, and an AC power supply. The Raspberry Pi runs the entire system. It connects to the monitor via the HDMI port and to other peripherals through USB and auxiliary ports.
Once you have your hardware prepared, you will need to install the Raspberry Pi Operating System, which can be downloaded free from the official Raspberry Pi website. Ensure to choose the ‘Raspberry Pi OS with Desktop’ option as it provides the necessary GUI for the smart mirror.
Next, set up your monitor behind the mirror. Use an acrylic see-through mirror for this purpose as it can act as a mirror whilst allowing you to see the display behind it. Connect your Raspberry Pi to the monitor using the HDMI cable and power it up.
Now, let’s talk about setting up a voice-control interface.
First, obtain credentials from Google Console, create a project and enable the Google Assistant API. You will receive a JSON file which is your primary access key to make requests from the Google Assistant API. Save this file as it will enable the Google Assistant SDK to authenticate your DIY smart mirror.
Then, set up the Google Assistant SDK environment on the Raspberry Pi. Use the command line or terminal to navigate to a suitable directory and execute a set of scripts. You’ll need to install the Google Assistant Library and the Python client library.
After setting up the SDK environment, the next step is to ensure your Raspberry Pi can listen and talk. Use the USB microphone to input voice commands and the speakers for audio output. You will use the ‘arecord’ and ‘aplay’ utilities (pre-installed in the Raspberry Pi OS) to test your microphone and speaker.
With the hardware and Google Assistant ready, let’s move on to the magic point—the code. This is where the voice-control interface for your smart mirror comes alive. MagicMirror², an open-source modular smart mirror platform, is highly recommended to make your code work easy. This platform has a fully-packed set of modules essential for your smart mirror. A compliment feature when you wake up, current weather, news feed, and Google calendar are some examples of its base modules.
To integrate Google Assistant with MagicMirror², you need a module called MMM-GoogleAssistant. It allows MagicMirror² to process voice commands and respond accordingly. You will find its installation instruction on your GitHub page.
When you have mastered the voice assistant basics, you can challenge yourself and take it to the next level. You can register your DIY Smart Mirror as a device model in the Google Actions Console. This will allow it to behave like any other Google Assistant-enabled device in your home. You can then use Device Actions to control other home automation devices just by issuing commands to your Smart Mirror.
Essentially, the open-source nature of Raspberry Pi and Google Assistant SDK allows you to customize your Smart Mirror to your personality and needs.
Keep in mind that your smart mirror’s performance largely depends on your hardware’s quality. A high-quality noise-canceling microphone and a top-performing Raspberry Pi model ensure excellent performance. Similarly, a larger monitor delivers a more detailed display.
In conclusion, the concept of voice-controlled smart mirrors might have seemed impossible a few years ago. But, with the current advancements in technology, it’s now something you can create from the comfort of your home. This project not only brings convenience and luxury to your life but is also an excellent opportunity to learn and improve your coding skills. Happy DIY-ing!
