Delete docs/xvf3800_usb_led_testing.md
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# XVF3800 USB LED and Mute Button Support in `linux-voice-assistant`
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The XVF3800 branch now includes **USB-based LED ring support** using the XVF3800’s legacy LED control commands (`LED_EFFECT`, `LED_BRIGHTNESS`, `LED_SPEED`, `LED_COLOR`). This post outlines how to pull the branch, refresh your virtualenv, and enable XVF3800 support in `config.json`. I fully expect bugs and you should too. Let me know if it works first try and I will by some lottery tickets as well.
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---
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## 1. Get the XVF3800 Branch
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If you **already have** the repo:
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```bash
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cd ~/linux-voice-assistant
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git fetch origin
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git switch XVF3800 # or: git checkout xvf3800
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git pull
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```
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If you’re **cloning fresh**:
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```bash
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cd ~
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git clone --branch XVF3800 --single-branch https://github.com/imonlinux/linux-voice-assistant.git
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```
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---
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## 2. Install/Refresh the Virtualenv (New Dependencies)
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The XVF3800 backend uses **pyusb** and system libusb.
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From the project root:
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```bash
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cd ~/linux-voice-assistant
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# remove the linux_voice_assistant.egg-info folder if it exists
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rm -rf linux_voice_assistant.egg-info
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# Create venv if you don't already have one
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script/setup
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```
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On Debian/RPi OS, make sure libusb is installed:
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```bash
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sudo apt update
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sudo apt install libusb-1.0-0
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```
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No extra `hidapi` is required for the LED integration (this path is pure pyusb).
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## 3. Copy the udev rule for the XVF3800
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On the Pi:
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```bash
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sudo cp ~linux-voice-assistant/XVF3800/99-respeaker-xvf3800.rules /etc/udev/rules.d/99-respeaker-xvf3800.rules
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```
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This does:
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- Matches the XVF3800 by VID/PID (2886:001a)
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- Sets permissions to 0660
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- Assigns it to the plugdev group
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- Tags it for desktop access (uaccess)
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### Add user (pi) to the plugdev group
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**use the user name that you have created if not pi**
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```bash
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sudo usermod -aG plugdev pi
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```
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Then log out and back in (or reboot) so the new group membership takes effect.
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### Reload udev rules and replug the device
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If you didn't reboot, reload the udev rules:
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```bash
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sudo udevadm control --reload-rules
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sudo udevadm trigger
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```
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Then unplug/replug the XVF3800 USB cable.
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You can sanity-check permissions with:
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```bash
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ls -l /dev/bus/usb/*/*
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```
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Look for the device entry that corresponds to 2886:001a (you can pair it with lsusb), and confirm it’s root plugdev with crw-rw----.
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## 4. Enable XVF3800 Support in `config.json`
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Edit `linux_voice_assistant/config.json` and set the `led` block to use the XVF3800 USB backend. If you want to test the mute button, add the following button section as well. See the `linux_voice_assistant/config.json.example` file for additional options.
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Minimal example:
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```jsonc
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{
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"app": {
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"name": "Linux Voice Assistant XVF3800"
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},
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"led": {
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"enabled": true,
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"led_type": "xvf3800",
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"interface": "usb"
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},
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"button": {
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"enabled": true,
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"mode": "xvf3800"
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},
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"mqtt": {
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"host": "192.168.1.2",
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"port": 1883,
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"username": "mqtt_username",
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"password": "mqtt_password"
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}
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}
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```
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---
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## 5. Run the Assistant with XVF3800 LEDs
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Stop any running systemd units:
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```bash
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systemctl --user stop linux-voice-assistant.service
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```
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From the project root:
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```bash
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cd ~/linux-voice-assistant
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script/run --debug
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```
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With the XVF3800 branch + config above, the **USB LED ring** should now:
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- Show the configured **idle / listening / thinking / responding / error** effects
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- Turn **solid dim red** when the mic is muted
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- Track changes coming from the MQTT LED state entities
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The mute button should now:
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- Keep hardware mute & software/LVA mute fully in sync.
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- No short/long press differentiation:
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One physical control, one responsibility: mute/unmute.
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`Wake/stop is still done via wake word or a separate GPIO button (you can still wire a standalone Pi button and run mode="gpio" in parallel if desired).`
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