nix-config/hosts/pi/default.nix

{ config, lib, pkgs, self, ... }:

{
  imports = [
    self.inputs.nixos-hardware.nixosModules.raspberry-pi-4
    ./hardware-configuration.nix
    ../server.nix
  ];

  nixpkgs.hostPlatform = "aarch64-linux";

  hardware = {
    raspberry-pi."4" = {
      apply-overlays-dtmerge.enable = true;
      audio.enable = false;
      fkms-3d.enable = false;
      xhci.enable = false;
    };
    deviceTree = {
      enable = true;
      filter = "*rpi-4-*.dtb";
      overlays = [
        {
          name = "audio-off-overlay";
          dtsText = ''
            /dts-v1/;
            /plugin/;

            / {
              compatible = "brcm,bcm2711";

              fragment@0 {
                target = <&vchiq>;

                __overlay__ {
                  status = "disabled";
                };
              };
            };
          '';
        }
        {
          # Adapted from: https://github.com/raspberrypi/linux/blob/rpi-6.1.y/arch/arm/boot/dts/overlays/hifiberry-digi-pro-overlay.dts
          # changes:
          # - modified top-level "compatible" field from bcm2835 to bcm2711
          # - s/i2s_clk_consumer/i2s/ (name on bcm2711 platform)
          name = "hifiberry-digi-pro";
          dtsText = ''
            /dts-v1/;
            /plugin/;

            / {
                compatible = "brcm,bcm2711";

                fragment@0 {
                    target = <&i2s>;
                    __overlay__ {
                        status = "okay";
                    };
                };

                fragment@1 {
                    target = <&i2c1>;
                    __overlay__ {
                        #address-cells = <1>;
                        #size-cells = <0>;
                        status = "okay";

                        wm8804@3b {
                            #sound-dai-cells = <0>;
                            compatible = "wlf,wm8804";
                            reg = <0x3b>;
                            PVDD-supply = <&vdd_3v3_reg>;
                            DVDD-supply = <&vdd_3v3_reg>;
                            status = "okay";
                        };
                    };
                };

                fragment@2 {
                    target = <&sound>;
                    __overlay__ {
                        compatible = "hifiberry,hifiberry-digi";
                        i2s-controller = <&i2s>;
                        status = "okay";
                        clock44-gpio = <&gpio 5 0>;
                        clock48-gpio = <&gpio 6 0>;
                    };
                };
            };
          '';
        }
      ];
    };
    firmware = with pkgs; [
      firmwareLinuxNonfree
      wireless-regdb
    ];
  };

  networking.hostId = "731d1660";

  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  age.secrets."files/services/home-assistant/secrets.yaml" = {
    file = "${self.inputs.secrets}/files/services/home-assistant/secrets.yaml.age";
    path = "${config.services.home-assistant.configDir}/secrets.yaml";
    owner = "hass";
    group = "hass";
  };

  services.home-assistant = {
    enable = true;

    config = {
      automation = "!include automations.yaml";
      backup = { };
      binary_sensor = [ ];
      default_config = { };
      ffmpeg = { };
      homeassistant = {
        name = "Home";
        latitude = "!secret latitude";
        longitude = "!secret longitude";
        country = "GB";
        temperature_unit = "C";
        time_zone = config.time.timeZone;
        unit_system = "metric";
        auth_providers = [
          {
            type = "trusted_networks";
            trusted_networks = [
              "100.64.0.0/10"
              "127.0.0.1"
            ];
            allow_bypass_login = true;
          }
          {
            type = "homeassistant";
          }
        ];
      };
      logger = {
        default = "info";
        logs = { };
      };
      lovelace = { };
      media_player = [ ];
      mobile_app = { };
      mqtt = { };
      onkyo = { };
      open_meteo = { };
      recorder = {
        purge_keep_days = 365;
      };
      scene = "!include scenes.yaml";
      sensor = [ ];
      system_health = { };
      zeroconf = { };
    };

    extraComponents = [
      "air_quality"
      "airly"
      "alert"
      "api"
      "application_credentials"
      "asuswrt"
      "auth"
      "automation"
      "backup"
      "bayesian"
      "binary_sensor"
      # "blackbird"
      "blueprint"
      "bluetooth"
      "bluetooth_adapters"
      "bluetooth_le_tracker"
      "button"
      "calendar"
      "camera"
      "cast"
      "cert_expiry"
      "climate"
      "co2signal"
      "color_extractor"
      "command_line"
      "compensation"
      "config"
      "configurator"
      "counter"
      "cover"
      "cpuspeed"
      "default_config"
      "demo"
      "derivative"
      "device_automation"
      "device_sun_light_trigger"
      "device_tracker"
      "dhcp"
      "dlna_dmr"
      "dlna_dms"
      "dnsip"
      "energy"
      "esphome"
      "fail2ban"
      "fan"
      "feedreader"
      "ffmpeg"
      "file"
      "file_upload"
      "filesize"
      "folder"
      "folder_watcher"
      "forecast_solar"
      "frontend"
      "gdacs"
      "generic"
      "generic_hygrostat"
      "generic_thermostat"
      "geo_json_events"
      "geo_location"
      "geo_rss_events"
      "github"
      "group"
      "hardware"
      "hdmi_cec"
      "history"
      "history_stats"
      "homeassistant"
      "homeassistant_alerts"
      "homekit"
      "homekit_controller"
      "html5"
      "http"
      "humidifier"
      "icloud"
      "image_processing"
      "image_upload"
      "input_boolean"
      "input_button"
      "input_datetime"
      "input_number"
      "input_select"
      "input_text"
      "integration"
      "ios"
      "jellyfin"
      "light"
      "local_calendar"
      "local_file"
      "local_ip"
      "local_todo"
      "lock"
      "logbook"
      "logentries"
      "logger"
      "lovelace"
      "manual"
      "manual_mqtt"
      "matter"
      "media_player"
      "media_source"
      "min_max"
      "mjpeg"
      "mobile_app"
      "modern_forms"
      "mold_indicator"
      "moon"
      "mqtt"
      "mqtt_eventstream"
      "mqtt_json"
      "mqtt_room"
      "mqtt_statestream"
      "mysensors"
      "network"
      "nmap_tracker"
      "notify"
      "number"
      "onboarding"
      "onkyo"
      "panel_custom"
      "persistent_notification"
      "person"
      "ping"
      "plant"
      "prometheus"
      "proximity"
      "push"
      "proximity"
      "python_script"
      "radio_browser"
      "random"
      "recorder"
      "remote"
      "repairs"
      "rest"
      "rest_command"
      "rss_feed_template"
      "scene"
      "schedule"
      "scrape"
      "script"
      "search"
      "season"
      "select"
      "sense"
      "sensor"
      "sensorpush"
      "shell_command"
      "shopping_list"
      "siren"
      "smtp"
      "snmp"
      "sql"
      "ssdp"
      "statistics"
      "stream"
      "sun"
      "switch"
      "switch_as_x"
      "system_health"
      "system_log"
      "systemmonitor"
      "tag"
      "tailscale"
      "tcp"
      "template"
      "text"
      "thread"
      "threshold"
      "time_date"
      "timer"
      "tod"
      "todo"
      "tomorrowio"
      "trend"
      "universal"
      "upb"
      "update"
      "upnp"
      "uptime"
      "usb"
      "utility_meter"
      "vacuum"
      "vlc"
      "vlc_telnet"
      "wake_on_lan"
      "water_heater"
      "weather"
      "webhook"
      "websocket_api"
      "wled"
      "workday"
      "worldclock"
      "zeroconf"
      "zone"
    ];

    customLovelaceModules = with pkgs.home-assistant-custom-lovelace-modules; [
      mushroom
    ];

  };

  services.mosquitto = {
    enable = true;
    listeners = [{
      acl = [ "pattern readwrite #" ];
      omitPasswordAuth = true;
      port = 1883;
      settings = {
        allow_anonymous = true;
      };
    }];
  };

  age.secrets."files/services/zigbee2mqtt/secret.yaml" = {
    file = "${self.inputs.secrets}/files/services/zigbee2mqtt/secret.yaml.age";
    path = "${config.services.zigbee2mqtt.dataDir}/secret.yaml";
    owner = "zigbee2mqtt";
    group = "zigbee2mqtt";
  };

  services.zigbee2mqtt = {
    package = pkgs.unstable.zigbee2mqtt;
    enable = true;
    dataDir = "/var/lib/zigbee2mqtt";
    settings = {
      homeassistant = lib.optionalAttrs config.services.home-assistant.enable {
        discovery_topic = "homeassistant";
        status_topic = "hass/status";
        legacy_entity_attributes = true;
        legacy_triggers = true;
      };
      availability = true;
      frontend = true;
      device_options = {
        retain = true;
      };
      serial = {
        port = "/dev/serial/by-id/usb-Silicon_Labs_Sonoff_Zigbee_3.0_USB_Dongle_Plus_0001-if00-port0";
      };
      advanced = {
        channel = 20;
        network_key = "!secret.yaml network_key";
        pan_id = 13001;
        ext_pan_id = [ 79 1 73 47 250 136 124 222 ];
        transmit_power = 20;
      };
      mqtt = {
        version = 5;
        server = "mqtt://localhost:1883";
      };
    };
  };

  modules = {
    networking = {
      wireless = {
        enable = true;
        interfaces = [ "wlan0" ];
      };
    };
    services = {
      borgmatic = {
        enable = true;
        directories = [
          "/var/lib/mosquitto"
          "/var/lib/zigbee2mqtt"
        ];
        repoPath = "ssh://qcw86s11@qcw86s11.repo.borgbase.com/./repo";
      };
    };
  };

  # Connection to ONKYO HT-R990
  networking.interfaces.end0 = {
    ipv4.addresses = [{
      address = "172.16.0.1";
      prefixLength = 30;
    }];
  };

  environment.systemPackages = with pkgs; [
    python311Packages.onkyo-eiscp
    libraspberrypi
    raspberrypi-eeprom
  ];

  system.stateVersion = "22.11";
}