nixos-configs/devices/homie/modules/home-assistant/bluetooth.nix

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{
config,
lib,
pkgs,
...
}: {
# Setup Bluetooth
hardware.bluetooth = {
enable = true;
powerOnBoot = true;
settings = {
General = {
DiscoverableTimeout = 0;
Experimental = true;
KernelExperimental = true;
};
Policy.AutoEnable = "true";
};
};
# Have pulseaudio.service itself start at boot but after bluetooth
# so bluetooth accepts sound connections from the start.
systemd.user.services.pulseaudio.after = ["bluetooth.service"];
systemd.user.targets.default.wants = ["pulseaudio.service"];
# Turn On the speaker automatically when openwakeword is used
services.home-assistant.config = {
shell_command.turn_on_ue = lib.getExe (pkgs.writeShellApplication {
name = "turnOnUE";
runtimeInputs = [config.hardware.bluetooth.package];
text = ''
cmd=0x0003
bt_device_addr=88:C6:26:93:4B:77
# This is the MAC address on the first line of `bluetootctl show`
# without the `:` and with `01` added at the end
bt_controller_addr=E848B8C8200001
exec gatttool -b $bt_device_addr --char-write-req --handle=$cmd --value=$bt_controller_addr
'';
});
automation = [
{
alias = "Turn On UE";
mode = "single";
trigger = [
{
platform = "state";
entity_id = "wake_word.openwakeword";
}
];
condition = [];
action = [
{
action = "shell_command.turn_on_ue";
metadata = {};
data = {};
}
];
}
];
};
# Allow pulseaudio to be managed by MPD
hardware.pulseaudio = {
enable = true;
extraConfig = ''
load-module module-native-protocol-tcp auth-ip-acl=127.0.0.1
'';
};
# Setup MPD
services.home-assistant.extraComponents = [
"mpd"
# BT components
"ibeacon"
"led_ble"
"kegtron"
"xiaomi_ble"
];
services.mpd = {
enable = true;
network = {
listenAddress = "127.0.0.1";
port = 6600;
};
extraConfig = ''
audio_output {
type "pulse"
name "UE Boom 2"
sink "bluez_sink.88_C6_26_93_4B_77.a2dp_sink"
server "127.0.0.1"
}
'';
};
}