Merge pull request #14 from imonlinux/HA_LVA_Discovery

HA LVA Discovery

docs/linux-voice-assistant-2mic-install.md

@@ -25,7 +25,8 @@ This guide reproduces a working setup of the **linux-voice-assistant** project w
 ```bash
 sudo apt update
 sudo apt upgrade
-sudo apt install libportaudio2 build-essential git libmpv-dev mpv python3.11-dev
+sudo apt install libportaudio2 build-essential git \
+      libmpv-dev mpv python3.11-dev avahi-daemon avahi-utils
 sudo reboot
 ```
 
@@ -82,6 +83,19 @@ aplay -l
 
 ## 7. Systemd services
 
+### (Optional) enable Avahi service file to advertise LVA to HA:
+
+```bash
+chmod +x ~/linux-voice-assistant/script/gen-esphome-avahi.sh
+sudo ~/linux-voice-assistant/script/gen-esphome-avahi.sh
+sudo mkdir -p /etc/systemd/system/linux-voice-assistant.service.d
+sudo cp ~/linux-voice-assistant/service/10-avahi.conf sudo mkdir -p /etc/systemd/system/linux-voice-assistant.service.d/10-avahi.conf
+```
+
+```bash
+sudo systemctl restart avahi-daemon.service
+```
+
 ### (Optional) for Pulse Audio  with OWW copy this service file into /etc/systemd/system/:
 
 ```bash
@@ -145,6 +159,8 @@ sudo systemctl status linux-voice-assistant wyoming-openwakeword --no-pager -l
 
 ## 8. Connect to Home Assistant
 
+### If HA does not discover the new LVA:
+
 1. In Home Assistant, go to "Settings" -> "Device & services"
 2. Click the "Add integration" button
 3. Choose "ESPHome" and then "Set up another instance of ESPHome"

script/gen-esphome-avahi.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+PORT=6053
+NAME="%h (Linux Voice Assistant)"
+
+mapfile -t IFACES < <(ip -o link show up | awk -F': ' '{print $2}' | grep -v '^lo$')
+
+TXT="    <txt-record>platform=linux</txt-record>
+"
+LIST=""
+for i in "${IFACES[@]}"; do
+  mac=$(cat "/sys/class/net/$i/address")
+  if [ -d "/sys/class/net/$i/wireless" ] || [[ $i == wl* ]]; then net=wifi; else net=ethernet; fi
+  TXT+="    <txt-record>mac_${i}=${mac}</txt-record>
+"
+  TXT+="    <txt-record>net_${i}=${net}</txt-record>
+"
+  LIST+="${i},"
+done
+LIST=${LIST%,}
+
+cat >/etc/avahi/services/esphome-lva.service <<XML
+<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
+<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
+<service-group>
+  <name replace-wildcards="yes">${NAME}</name>
+  <service>
+    <type>_esphomelib._tcp</type>
+    <port>${PORT}</port>
+    <txt-record>ifaces=${LIST}</txt-record>
+${TXT}  </service>
+</service-group>
+XML

service/10-avahi.conf

@@ -0,0 +1,3 @@
+[Unit]
+Wants=avahi-daemon.service
+After=avahi-daemon.service