如何在RPI3运行的智能魔镜中打开指定网页及实现语音控制

Got it, let's tackle these two requirements for your RPI3-based smart mirror step by step. I've messed around with similar setups before, so here's what worked reliably for me:

Most smart mirror setups use Chromium as the default browser, so we'll focus on that:

• Manual Testing First: If you just want to quickly test opening a webpage in fullscreen (perfect for a mirror), fire up the terminal and run:

  chromium-browser --kiosk https://www.google.com
  

  The --kiosk flag forces Chromium to run in fullscreen without any UI elements. For a cleaner experience, add extra flags: --start-fullscreen --incognito --noerrdialogs to hide the address bar, avoid cache buildup, and suppress error popups.

• Auto-Launch on Boot (Production Setup): To make the webpage open automatically when your RPI3 starts up:

  1. Open the autostart config file with nano ~/.config/lxsession/LXDE-pi/autostart
  2. Add this line at the end (replace the URL with whatever you need):

     @chromium-browser --kiosk --noerrdialogs --incognito https://www.google.com
     

  3. Save and exit with Ctrl+O then Ctrl+X. Reboot your Pi, and the page should load automatically.

For voice control, Python with the SpeechRecognition library is a solid choice—it's straightforward and plays nicely with the Pi's audio hardware. Here's how to set it up:

Step 1: Install Required Tools #

First, install dependencies via terminal:

sudo apt-get update && sudo apt-get install python3-pip python3-pyaudio
pip3 install SpeechRecognition pyttsx3

• SpeechRecognition handles converting audio to text (we'll use Google's API for better accuracy—requires internet)
• pyttsx3 is an offline text-to-speech engine so your mirror can respond out loud
• Don't forget to grant audio permissions to your user: sudo usermod -a -G audio pi then reboot.

Step 2: Write the Voice Control Script #

Create a file named mirror_voice.py in your home directory (e.g., /home/pi/mirror_voice.py) with this code:

import speech_recognition as sr
import pyttsx3
import subprocess

# Initialize text-to-speech engine
engine = pyttsx3.init()

def speak(text):
    engine.say(text)
    engine.runAndWait()

def listen_for_command():
    r = sr.Recognizer()
    with sr.Microphone() as source:
        print("Listening for your command...")
        r.adjust_for_ambient_noise(source)  # Cut down background noise
        audio = r.listen(source)

    try:
        # Convert audio to text using Google's API
        command = r.recognize_google(audio).lower()
        print(f"Detected command: {command}")
        return command
    except sr.UnknownValueError:
        speak("Sorry, I didn't catch that. Could you repeat?")
        return None
    except sr.RequestError:
        speak("Sorry, my speech service is unavailable right now.")
        return None

def open_google_webpage():
    # Close any existing Chromium windows first (optional but clean)
    subprocess.run(["pkill", "chromium-browser"], check=False)
    # Launch Chromium in kiosk mode with Google
    subprocess.Popen([
        "chromium-browser", 
        "--kiosk", 
        "--noerrdialogs", 
        "--incognito", 
        "https://www.google.com"
    ])
    speak("Opening the Google webpage for you.")

if __name__ == "__main__":
    speak("Smart mirror is ready. Please give your command.")
    # Keep listening for commands indefinitely
    while True:
        command = listen_for_command()
        if command and "smart mirror, please open google webpage" in command:
            open_google_webpage()
        # You can add more command triggers here if you want to expand functionality

Step 3: Test the Script #

Run the script with python3 /home/pi/mirror_voice.py, then say your command clearly. The mirror should respond verbally and launch the Google page. If it doesn't pick up your voice, double-check your microphone connection and audio permissions.

Step 4: Auto-Launch the Voice Script on Boot #

To make voice control start automatically when your Pi boots, add this line to the same autostart file we edited earlier (~/.config/lxsession/LXDE-pi/autostart):

@python3 /home/pi/mirror_voice.py

Save, reboot, and your mirror will be ready to listen for your command as soon as it starts up.

内容的提问来源于stack exchange，提问作者Smith john