diff --git a/modules/nixos/adb.nix b/modules/nixos/adb.nix
new file mode 100644
index 00000000..ebbc2b07
--- /dev/null
+++ b/modules/nixos/adb.nix
@@ -0,0 +1,137 @@
+let
+  deviceModule = {config, lib, ...}: let
+    inherit (lib.options) mkOption mkEnableOption;
+  in {
+    options = with lib.types; {
+      enable = mkEnableOption "adb device" // {
+        default = true;
+      };
+      uphold = mkOption {
+        type = bool;
+        default = true;
+      };
+      serial = mkOption {
+        type = str;
+      };
+    };
+  };
+in {
+  config,
+  gensokyo-zone,
+  utils,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (lib.options) mkOption mkPackageOption mkEnableOption;
+  inherit (lib.modules) mkIf mkMerge mkDefault mkOptionDefault;
+  inherit (lib.attrsets) filterAttrs mapAttrsToList;
+  inherit (lib.cli) toGNUCommandLine;
+  inherit (utils) escapeSystemdExecArgs escapeSystemdPath;
+  inherit (gensokyo-zone.lib) mapOptionDefaults;
+  cfg = config.services.adb;
+  enabledDevices = filterAttrs (_: device: device.enable) cfg.devices;
+in {
+  options.services.adb = with lib.types; {
+    enable = mkEnableOption "adb server";
+    package = mkPackageOption pkgs "android-tools" {};
+    rulesPackage = mkPackageOption pkgs "android-udev-rules" {};
+    user = mkOption {
+      type = str;
+      default = "adb";
+    };
+    port = mkOption {
+      type = port;
+      default = 5037;
+    };
+    extraArguments = mkOption {
+      type = listOf str;
+      default = [];
+    };
+    settings = mkOption {
+      type = attrsOf (oneOf [ str int (nullOr bool) ]);
+    };
+    devices = mkOption {
+      type = attrsOf (submoduleWith {
+        modules = [deviceModule];
+        specialArgs = {
+          inherit gensokyo-zone;
+          nixosConfig = config;
+        };
+      });
+      default = {};
+    };
+  };
+  config = let
+    confService.services.adb = {
+      settings = mapOptionDefaults {
+        H = config.networking.hostName;
+        P = cfg.port;
+      };
+    };
+    conf.services.udev.packages = [ cfg.rulesPackage ];
+    conf.environment.systemPackages = [ cfg.package ];
+    conf.users.groups.adbusers = {};
+    conf.systemd.services.adb = {
+      upholds = let
+        upheldDevices = filterAttrs (_: device: device.uphold) enabledDevices;
+      in mapAttrsToList (_: device: "adb-device@${escapeSystemdPath device.serial}.service") upheldDevices;
+      after = ["network.target"];
+      wantedBy = ["multi-user.target"];
+      serviceConfig = {
+        Type = mkOptionDefault "forking";
+        ExecStart = let
+          args = toGNUCommandLine { } cfg.settings ++ cfg.extraArguments;
+        in [
+          "${cfg.package}/bin/adb start-server ${escapeSystemdExecArgs args}"
+        ];
+        ExecStop = [
+          "${cfg.package}/bin/adb kill-server"
+        ];
+        WorkingDirectory = "/var/lib/adb";
+        StateDirectory = "adb";
+        RuntimeDirectory = "adb";
+        User = cfg.user;
+      };
+    };
+    conf.systemd.services."adb-device@" = rec {
+      requisite = [ "adb.service" ];
+      partOf = requisite;
+      after = requisite;
+      environment = mapOptionDefaults {
+        ANDROID_SERIAL = "%I";
+      };
+      path = [cfg.package pkgs.coreutils];
+      serviceConfig = mapOptionDefaults {
+        User = cfg.user;
+      };
+      script = ''
+        set -eu
+
+        while true; do
+          sleep 1
+          DEVICE_ONLINE=
+          if ADB_STATE=$(adb get-state 2>/dev/null); then
+            if [[ $ADB_STATE == device ]]; then
+              DEVICE_ONLINE=1
+            fi
+          fi
+          if [[ -n $DEVICE_ONLINE ]] || timeout 5 adb connect $ANDROID_SERIAL; then
+            sleep 10
+          else
+            sleep 4
+          fi
+        done
+      '';
+    };
+    conf.users.users.adb = mkIf (cfg.user == "adb") {
+      isSystemUser = true;
+      group = mkDefault "adbusers";
+      home = mkDefault "/var/lib/adb";
+    };
+  in
+    mkMerge [
+      confService
+      (mkIf cfg.enable conf)
+    ];
+}
diff --git a/modules/nixos/home-assistant.nix b/modules/nixos/home-assistant.nix
index 0b4eaab8..905f3565 100644
--- a/modules/nixos/home-assistant.nix
+++ b/modules/nixos/home-assistant.nix
@@ -317,4 +317,9 @@ in {
       )
     ];
   };
+  config.users.users.hass = mkIf cfg.enable {
+    extraGroups = mkIf (elem "androidtv" cfg.extraComponents && (config.programs.adb.enable || config.services.adb.enable)) [
+      "adbusers"
+    ];
+  };
 }
diff --git a/modules/system/exports/adb.nix b/modules/system/exports/adb.nix
new file mode 100644
index 00000000..264f6107
--- /dev/null
+++ b/modules/system/exports/adb.nix
@@ -0,0 +1,26 @@
+{
+  lib,
+  gensokyo-zone,
+  ...
+}: let
+  inherit (gensokyo-zone.lib) mkAlmostOptionDefault;
+  inherit (lib.modules) mkIf;
+in {
+  config.exports.services.adb = {config, ...}: {
+    displayName = mkAlmostOptionDefault "ADB";
+    nixos = {
+      serviceAttr = "adb";
+      assertions = mkIf config.enable [
+        (nixosConfig: {
+          assertion = config.ports.default.port == nixosConfig.services.adb.port;
+          message = "port mismatch";
+        })
+      ];
+    };
+    defaults.port.listen = mkAlmostOptionDefault "localhost";
+    ports.default = {
+      port = mkAlmostOptionDefault 5037;
+      transport = "tcp";
+    };
+  };
+}
diff --git a/nixos/adb.nix b/nixos/adb.nix
new file mode 100644
index 00000000..946f8f4f
--- /dev/null
+++ b/nixos/adb.nix
@@ -0,0 +1,26 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib.modules) mkIf mkDefault;
+  cfg = config.services.adb;
+in {
+  services.adb = {
+    enable = mkDefault true;
+    settings = {
+      #a = mkDefault true;
+    };
+    devices = {
+      bedroom-tv.serial = "10.1.1.67:5555";
+    };
+  };
+  systemd.services = mkIf cfg.enable {
+    adb = {
+      environment.ADB_TRACE = mkDefault (toString [ "adb" ]);
+    };
+  };
+  networking.firewall.interfaces.lan = mkIf (cfg.enable && cfg.settings.a or false == true) {
+    allowedTCPPorts = [ cfg.port ];
+  };
+}
diff --git a/systems/tei/default.nix b/systems/tei/default.nix
index 1386a750..70b4e62f 100644
--- a/systems/tei/default.nix
+++ b/systems/tei/default.nix
@@ -18,6 +18,7 @@ _: {
       zigbee2mqtt.enable = true;
       barcodebuddy.enable = true;
       postgresql.enable = true;
+      adb.enable = true;
     };
   };
 }
diff --git a/systems/tei/nixos.nix b/systems/tei/nixos.nix
index 1c2dfc6f..cc1d9a94 100644
--- a/systems/tei/nixos.nix
+++ b/systems/tei/nixos.nix
@@ -15,6 +15,7 @@ in {
     nixos.cloudflared
     nixos.postgres
     nixos.nginx
+    nixos.adb
     nixos.access.home-assistant
     nixos.access.zigbee2mqtt
     nixos.access.grocy