all screens basically working, but bluetooth is rough

lua/licenses.lua

@@ -80,7 +80,10 @@ end
 
 
 return function()
-  local menu = widgets.MenuScreen(true, "Licenses")
+  local menu = widgets.MenuScreen({
+    show_back = true,
+    title = "Licenses"
+  })
 
   local container = menu.root:Object {
     flex = {

lua/settings.lua

@@ -3,6 +3,9 @@ local backstack = require("backstack")
 local widgets = require("widgets")
 local theme = require("theme")
 local volume = require("volume")
+local display = require("display")
+local controls = require("controls")
+local bluetooth = require("bluetooth")
 
 local settings = {}
 
@@ -34,16 +37,26 @@ function settings.bluetooth()
     flex = {
       flex_direction = "row",
       justify_content = "flex-start",
-      align_items = "flex-start",
+      align_items = "content",
       align_content = "flex-start",
     },
     w = lvgl.PCT(100),
     h = lvgl.SIZE_CONTENT,
+    pad_bottom = 1,
   }
   enable_container:Label { text = "Enable", flex_grow = 1 }
-  enable_container:Switch {}
+  local enable_sw = enable_container:Switch {}
+  enable_sw:onevent(lvgl.EVENT.VALUE_CHANGED, function()
+    local enabled = enable_sw:enabled()
+    bluetooth.enabled:set(enabled)
+  end)
 
-  local preferred_container = menu.content:Object {
+  menu.content:Label {
+    text = "Paired Device",
+    pad_bottom = 1,
+  }:add_style(theme.settings_title)
+
+  local paired_container = menu.content:Object {
     flex = {
       flex_direction = "row",
       justify_content = "flex-start",
@@ -52,25 +65,50 @@ function settings.bluetooth()
     },
     w = lvgl.PCT(100),
     h = lvgl.SIZE_CONTENT,
+    pad_bottom = 2,
   }
-  preferred_container:add_style(theme.settings_title)
-  preferred_container:Label {
-    text = "Preferred Device",
-    flex_grow = 1,
-  }
-  preferred_container:Label { text = "x" }
 
-  local preferred_device = menu.content:Label {
+  local paired_device = paired_container:Label {
-    text = "My Cool Speakers",
+    flex_grow = 1,
   }
+  local clear_paired = paired_container:Button {}
+  clear_paired:Label { text = "x" }
+  clear_paired:onClicked(function()
+    print("clear dev")
+    bluetooth.paired_device:set()
+  end)
 
   menu.content:Label {
-    text = "Available Devices",
+    text = "Nearby Devices",
+    pad_bottom = 1,
   }:add_style(theme.settings_title)
 
-  local known_devices = menu.content:List {
+  local devices = menu.content:List {
     w = lvgl.PCT(100),
-    flex_grow = 1,
+    h = lvgl.SIZE_CONTENT,
+  }
+
+  menu.bindings = {
+    bluetooth.enabled:bind(function(en)
+      enable_sw:set { enabled = en }
+    end),
+    bluetooth.paired_device:bind(function(device)
+      if device then
+        paired_device:set { text = device.name }
+        clear_paired:clear_flag(lvgl.FLAG.HIDDEN)
+      else
+        paired_device:set { text = "None" }
+        clear_paired:add_flag(lvgl.FLAG.HIDDEN)
+      end
+    end),
+    bluetooth.devices:bind(function(devs)
+      devices:clean()
+      for _, dev in pairs(devs) do
+        devices:add_btn(nil, dev.name):onClicked(function()
+          bluetooth.paired_device:set(dev)
+        end)
+      end
+    end)
   }
 end
 
@@ -87,8 +125,9 @@ function settings.headphones()
   }
   local limits = { -10, 6, 10 }
   volume_chooser:onevent(lvgl.EVENT.VALUE_CHANGED, function()
-    local selection = volume_chooser:get('selected')
+    -- luavgl dropdown binding uses 0-based indexing :(
-    volume.limit_db.set(limits[selection])
+    local selection = volume_chooser:get('selected') + 1
+    volume.limit_db:set(limits[selection])
   end)
 
   menu.content:Label {
@@ -98,7 +137,7 @@ function settings.headphones()
   local balance = menu.content:Slider {
     w = lvgl.PCT(100),
     h = 5,
-    range = { min = -5, max = 5 },
+    range = { min = -100, max = 100 },
     value = 0,
   }
   balance:onevent(lvgl.EVENT.VALUE_CHANGED, function()
@@ -109,10 +148,9 @@ function settings.headphones()
 
   menu.bindings = {
     volume.limit_db:bind(function(limit)
-      print("new limit", limit)
       for i = 1, #limits do
         if limits[i] == limit then
-          volume_chooser:set{ selected = i }
+          volume_chooser:set { selected = i - 1 }
         end
       end
     end),
@@ -122,12 +160,14 @@ function settings.headphones()
       }
       if bias < 0 then
         balance_label:set {
-          text = string.format("Left -%.2fdB", bias / 4)
+          text = string.format("Left %.2fdB", bias / 4)
         }
-      else
+      elseif bias > 0 then
         balance_label:set {
-          text = string.format("Right -%.2fdB", -bias / 4)
+          text = string.format("Right %.2fdB", -bias / 4)
         }
+      else
+        balance_label:set { text = "Balanced" }
       end
     end),
   }
@@ -138,19 +178,37 @@ end
 function settings.display()
   local menu = SettingsScreen("Display")
 
-  menu.content:Label {
+  local brightness_title = menu.content:Object {
-    text = "Brightness",
+    flex = {
-  }:add_style(theme.settings_title)
+      flex_direction = "row",
+      justify_content = "flex-start",
+      align_items = "flex-start",
+      align_content = "flex-start",
+    },
+    w = lvgl.PCT(100),
+    h = lvgl.SIZE_CONTENT,
+  }
+  brightness_title:Label { text = "Brightness", flex_grow = 1 }
+  local brightness_pct = brightness_title:Label {}
+  brightness_pct:add_style(theme.settings_title)
 
   local brightness = menu.content:Slider {
     w = lvgl.PCT(100),
     h = 5,
     range = { min = 0, max = 100 },
-    value = 50,
+    value = display.brightness:get(),
   }
   brightness:onevent(lvgl.EVENT.VALUE_CHANGED, function()
-    print("bright", brightness:value())
+    display.brightness:set(brightness:value())
+  end)
+
+  menu.bindings = {
+    display.brightness:bind(function(b)
+      brightness_pct:set { text = tostring(b) .. "%" }
     end)
+  }
+
+  return menu
 end
 
 function settings.input()
@@ -160,14 +218,41 @@ function settings.input()
     text = "Control scheme",
   }:add_style(theme.settings_title)
 
+  local schemes = controls.schemes()
+  local option_to_scheme = {}
+  local scheme_to_option = {}
+
+  local option_idx = 0
+  local options = ""
+
+  for i, v in pairs(schemes) do
+    option_to_scheme[option_idx] = i
+    scheme_to_option[i] = option_idx
+    if option_idx > 0 then
+      options = options .. "\n"
+    end
+    options = options .. v
+    option_idx = option_idx + 1
+  end
+
   local controls_chooser = menu.content:Dropdown {
-    options = "Buttons only\nD-Pad\nTouchwheel",
+    options = options,
-    selected = 3,
   }
+
+  menu.bindings = {
+    controls.scheme:bind(function(s)
+      local option = scheme_to_option[s]
+      controls_chooser:set({ selected = option })
+    end)
+  }
+
   controls_chooser:onevent(lvgl.EVENT.VALUE_CHANGED, function()
-    local selection = controls_chooser:get('selected')
+    local option = controls_chooser:get('selected')
-    print("controls", selection)
+    local scheme = option_to_scheme[option]
+    controls.scheme:set(scheme)
   end)
+
+  return menu
 end
 
 function settings.database()

src/audio/audio_fsm.cpp

@@ -87,13 +87,14 @@ void AudioState::react(const SetVolume& ev) {
 }
 
 void AudioState::react(const SetVolumeLimit& ev) {
-  ESP_LOGI(kTag, "new max volume %i db",
+  uint16_t limit_in_dac_units =
-           (ev.new_limit - drivers::wm8523::kLineLevelReferenceVolume) / 4);
+      drivers::wm8523::kLineLevelReferenceVolume + (ev.limit_db * 4);
-  sI2SOutput->SetMaxVolume(ev.new_limit);
+
-  sServices->nvs().AmpMaxVolume(ev.new_limit);
+  sI2SOutput->SetMaxVolume(limit_in_dac_units);
+  sServices->nvs().AmpMaxVolume(limit_in_dac_units);
 
   events::Ui().Dispatch(VolumeLimitChanged{
-      .new_limit = ev.new_limit,
+      .new_limit_db = ev.limit_db,
   });
   events::Ui().Dispatch(VolumeChanged{
       .percent = sOutput->GetVolumePct(),
@@ -167,6 +168,20 @@ void Uninitialised::react(const system_fsm::BootComplete& ev) {
   }
   sOutput->SetMode(IAudioOutput::Modes::kOnPaused);
 
+  events::Ui().Dispatch(VolumeLimitChanged{
+      .new_limit_db =
+          (static_cast<int>(nvs.AmpMaxVolume()) -
+           static_cast<int>(drivers::wm8523::kLineLevelReferenceVolume)) /
+          4,
+  });
+  events::Ui().Dispatch(VolumeChanged{
+      .percent = sOutput->GetVolumePct(),
+      .db = sOutput->GetVolumeDb(),
+  });
+  events::Ui().Dispatch(VolumeBalanceChanged{
+      .left_bias = nvs.AmpLeftBias(),
+  });
+
   sSampleConverter.reset(new SampleConverter());
   sSampleConverter->SetOutput(sOutput);
 

src/audio/include/audio_events.hpp

@@ -63,11 +63,11 @@ struct VolumeBalanceChanged : tinyfsm::Event {
   int left_bias;
 };
 struct VolumeLimitChanged : tinyfsm::Event {
-  uint16_t new_limit;
+  int new_limit_db;
 };
 
 struct SetVolumeLimit : tinyfsm::Event {
-  uint16_t new_limit;
+  int limit_db;
 };
 
 struct TogglePlayPause : tinyfsm::Event {};

src/drivers/CMakeLists.txt

@@ -3,9 +3,11 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
 idf_component_register(
-  SRCS "touchwheel.cpp" "i2s_dac.cpp" "gpios.cpp" "adc.cpp" "storage.cpp" "i2c.cpp"
+  SRCS "touchwheel.cpp" "i2s_dac.cpp" "gpios.cpp" "adc.cpp" "storage.cpp"
-  "spi.cpp" "display.cpp" "display_init.cpp" "samd.cpp" "relative_wheel.cpp" "wm8523.cpp"
+  "i2c.cpp" "bluetooth.cpp" "spi.cpp" "display.cpp" "display_init.cpp"
-  "nvs.cpp" "bluetooth.cpp" "haptics.cpp" "spiffs.cpp"
+  "samd.cpp" "relative_wheel.cpp" "wm8523.cpp" "nvs.cpp" "haptics.cpp"
+  "spiffs.cpp"
   INCLUDE_DIRS "include"
-  REQUIRES "esp_adc" "fatfs" "result" "lvgl" "span" "tasks" "nvs_flash" "bt" "tinyfsm" "spiffs")
+  REQUIRES "esp_adc" "fatfs" "result" "lvgl" "span" "tasks" "nvs_flash" "spiffs"
+  "bt" "tinyfsm")
 target_compile_options(${COMPONENT_LIB} PRIVATE ${EXTRA_WARNINGS})

src/drivers/bluetooth.cpp

@@ -80,6 +80,36 @@ auto Bluetooth::IsEnabled() -> bool {
   return !bluetooth::BluetoothState::is_in_state<bluetooth::Disabled>();
 }
 
+auto Bluetooth::IsConnected() -> bool {
+  return bluetooth::BluetoothState::is_in_state<bluetooth::Connected>();
+}
+
+auto Bluetooth::ConnectedDevice() -> std::optional<bluetooth::Device> {
+  if (!IsConnected()) {
+    return {};
+  }
+  auto looking_for = bluetooth::BluetoothState::preferred_device();
+  for (const auto& dev : bluetooth::BluetoothState::devices()) {
+    if (dev.address == looking_for) {
+      return dev;
+    }
+  }
+  return {};
+}
+
+auto Bluetooth::SetDeviceDiscovery(bool allowed) -> void {
+  if (allowed == bluetooth::BluetoothState::discovery()) {
+    return;
+  }
+  bluetooth::BluetoothState::discovery(allowed);
+  tinyfsm::FsmList<bluetooth::BluetoothState>::dispatch(
+      bluetooth::events::DiscoveryChanged{});
+}
+
+auto Bluetooth::IsDiscovering() -> bool {
+  return bluetooth::BluetoothState::discovery();
+}
+
 auto Bluetooth::KnownDevices() -> std::vector<bluetooth::Device> {
   std::vector<bluetooth::Device> out = bluetooth::BluetoothState::devices();
   std::sort(out.begin(), out.end(), [](const auto& a, const auto& b) -> bool {
@@ -97,13 +127,8 @@ auto Bluetooth::SetPreferredDevice(const bluetooth::mac_addr_t& mac) -> void {
       bluetooth::events::PreferredDeviceChanged{});
 }
 
-auto Bluetooth::SetDeviceDiscovery(bool allowed) -> void {
+auto Bluetooth::PreferredDevice() -> std::optional<bluetooth::mac_addr_t> {
-  if (allowed == bluetooth::BluetoothState::discovery()) {
+  return bluetooth::BluetoothState::preferred_device();
-    return;
-  }
-  bluetooth::BluetoothState::discovery(allowed);
-  tinyfsm::FsmList<bluetooth::BluetoothState>::dispatch(
-      bluetooth::events::DiscoveryChanged{});
 }
 
 auto Bluetooth::SetSource(StreamBufferHandle_t src) -> void {
@@ -120,7 +145,7 @@ auto Bluetooth::SetEventHandler(std::function<void(bluetooth::Event)> cb)
   bluetooth::BluetoothState::event_handler(cb);
 }
 
-auto DeviceName() -> std::pmr::string {
+static auto DeviceName() -> std::pmr::string {
   uint8_t mac[8]{0};
   esp_efuse_mac_get_default(mac);
   std::ostringstream name;
@@ -267,7 +292,7 @@ Scanner* BluetoothState::sScanner_;
 std::mutex BluetoothState::sDevicesMutex_{};
 std::map<mac_addr_t, Device> BluetoothState::sDevices_{};
 std::optional<mac_addr_t> BluetoothState::sPreferredDevice_{};
-mac_addr_t BluetoothState::sCurrentDevice_{0};
+std::optional<Device> BluetoothState::sCurrentDevice_{};
 bool BluetoothState::sIsDiscoveryAllowed_{false};
 
 std::atomic<StreamBufferHandle_t> BluetoothState::sSource_;
@@ -331,7 +356,7 @@ auto BluetoothState::react(const events::DeviceDiscovered& ev) -> void {
     sDevices_[ev.device.address] = ev.device;
 
     if (ev.device.address == sPreferredDevice_) {
-      sCurrentDevice_ = ev.device.address;
+      sCurrentDevice_ = ev.device;
       is_preferred = true;
     }
 
@@ -466,9 +491,17 @@ void Idle::react(const events::internal::Gap& ev) {
 void Connecting::entry() {
   ESP_LOGI(kTag, "connecting to device");
   esp_a2d_source_connect(sPreferredDevice_.value().data());
+
+  if (sEventHandler_) {
+    std::invoke(sEventHandler_, Event::kConnectionStateChanged);
+  }
 }
 
-void Connecting::exit() {}
+void Connecting::exit() {
+  if (sEventHandler_) {
+    std::invoke(sEventHandler_, Event::kConnectionStateChanged);
+  }
+}
 
 void Connecting::react(const events::Disable& ev) {
   // TODO: disconnect gracefully

src/drivers/include/bluetooth.hpp

@@ -32,14 +32,20 @@ class Bluetooth {
   auto Disable() -> void;
   auto IsEnabled() -> bool;
 
+  auto IsConnected() -> bool;
+  auto ConnectedDevice() -> std::optional<bluetooth::Device>;
+
   /*
    * Sets whether or not the bluetooth stack is allowed to actively scan for
    * new devices.
    */
   auto SetDeviceDiscovery(bool) -> void;
+  auto IsDiscovering() -> bool;
 
   auto KnownDevices() -> std::vector<bluetooth::Device>;
+
   auto SetPreferredDevice(const bluetooth::mac_addr_t& mac) -> void;
+  auto PreferredDevice() -> std::optional<bluetooth::mac_addr_t>;
 
   auto SetSource(StreamBufferHandle_t) -> void;
   auto SetEventHandler(std::function<void(bluetooth::Event)> cb) -> void;
@@ -100,9 +106,11 @@ class BluetoothState : public tinyfsm::Fsm<BluetoothState> {
   static auto Init(NvsStorage& storage) -> void;
 
   static auto devices() -> std::vector<Device>;
+
   static auto preferred_device() -> std::optional<mac_addr_t>;
   static auto preferred_device(std::optional<mac_addr_t>) -> void;
 
+  static auto scanning() -> bool;
   static auto discovery() -> bool;
   static auto discovery(bool) -> void;
 
@@ -135,7 +143,7 @@ class BluetoothState : public tinyfsm::Fsm<BluetoothState> {
   static std::mutex sDevicesMutex_;
   static std::map<mac_addr_t, Device> sDevices_;
   static std::optional<mac_addr_t> sPreferredDevice_;
-  static mac_addr_t sCurrentDevice_;
+  static std::optional<Device> sCurrentDevice_;
   static bool sIsDiscoveryAllowed_;
 
   static std::atomic<StreamBufferHandle_t> sSource_;

src/drivers/include/bluetooth_types.hpp

@@ -21,6 +21,8 @@ struct Device {
 enum class Event {
   kKnownDevicesChanged,
   kConnectionStateChanged,
+  kPreferredDeviceChanged,
+  kDiscoveryChanged,
 };
 
 }  // namespace bluetooth

src/lua/CMakeLists.txt

@@ -4,7 +4,7 @@
 
 idf_component_register(
   SRCS "lua_thread.cpp" "bridge.cpp" "property.cpp" "lua_database.cpp"
-  "lua_queue.cpp" "lua_version.cpp"
+  "lua_queue.cpp" "lua_version.cpp" "lua_controls.cpp"
   INCLUDE_DIRS "include"
   REQUIRES "drivers" "lvgl" "tinyfsm" "events" "system_fsm" "database"
   "esp_timer" "battery" "esp-idf-lua" "luavgl" "lua-linenoise" "lua-term"

src/lua/bridge.cpp

@@ -16,6 +16,7 @@
 #include "lauxlib.h"
 #include "lua.h"
 #include "lua.hpp"
+#include "lua_controls.hpp"
 #include "lua_database.hpp"
 #include "lua_queue.hpp"
 #include "lua_version.hpp"
@@ -55,6 +56,7 @@ Bridge::Bridge(system_fsm::ServiceLocator& services, lua_State& s)
   luaL_requiref(&s, "term.core", luaopen_term_core, true);
   lua_pop(&s, 1);
 
+  RegisterControlsModule(&s);
   RegisterDatabaseModule(&s);
   RegisterQueueModule(&s);
   RegisterVersionModule(&s);

src/lua/include/lua_controls.hpp

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include "lua.hpp"
+
+namespace lua {
+
+auto RegisterControlsModule(lua_State*) -> void;
+
+}  // namespace lua

src/lua/include/property.hpp

@@ -6,18 +6,27 @@
 
 #pragma once
 
+#include <stdint.h>
 #include <memory>
 #include <string>
 
 #include "audio_events.hpp"
+#include "bluetooth_types.hpp"
 #include "lua.hpp"
 #include "lvgl.h"
 #include "service_locator.hpp"
 
 namespace lua {
 
-using LuaValue =
+// FIXME: We should use some kind of interface for this instead.
-    std::variant<std::monostate, int, bool, std::string, audio::Track>;
+using LuaValue = std::variant<std::monostate,
+                              int,
+                              bool,
+                              std::string,
+                              audio::Track,
+                              drivers::bluetooth::Device,
+                              std::vector<drivers::bluetooth::Device>>;
+
 using LuaFunction = std::function<int(lua_State*)>;
 
 class Property {

src/lua/lua_controls.cpp

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "lua_controls.hpp"
+
+#include <memory>
+#include <string>
+
+#include "lua.hpp"
+
+#include "esp_log.h"
+#include "lauxlib.h"
+#include "lua.h"
+#include "lvgl.h"
+
+#include "nvs.hpp"
+#include "ui_events.hpp"
+
+namespace lua {
+
+[[maybe_unused]] static constexpr char kTag[] = "lua_controls";
+
+static auto controls_schemes(lua_State* L) -> int {
+  lua_newtable(L);
+
+  lua_pushliteral(L, "Buttons Only");
+  lua_rawseti(L, -2,
+              static_cast<int>(drivers::NvsStorage::InputModes::kButtonsOnly));
+
+  lua_pushliteral(L, "D-Pad");
+  lua_rawseti(
+      L, -2,
+      static_cast<int>(drivers::NvsStorage::InputModes::kDirectionalWheel));
+
+  lua_pushliteral(L, "Touchwheel");
+  lua_rawseti(
+      L, -2, static_cast<int>(drivers::NvsStorage::InputModes::kRotatingWheel));
+
+  return 1;
+}
+
+static const struct luaL_Reg kControlsFuncs[] = {{"schemes", controls_schemes},
+                                                 {NULL, NULL}};
+
+static auto lua_controls(lua_State* state) -> int {
+  luaL_newlib(state, kControlsFuncs);
+  return 1;
+}
+
+auto RegisterControlsModule(lua_State* s) -> void {
+  luaL_requiref(s, "controls", lua_controls, true);
+  lua_pop(s, 1);
+}
+
+}  // namespace lua

src/lua/property.cpp

@@ -10,7 +10,9 @@
 #include <cmath>
 #include <memory>
 #include <string>
+#include <variant>
 
+#include "bluetooth_types.hpp"
 #include "lua.h"
 #include "lua.hpp"
 #include "lua_thread.hpp"
@@ -185,6 +187,35 @@ static auto pushTagValue(lua_State* L, const database::TagValue& val) -> void {
       val);
 }
 
+static void pushDevice(lua_State* L, const drivers::bluetooth::Device& dev) {
+  lua_createtable(L, 0, 4);
+
+  lua_pushliteral(L, "address");
+  auto* mac = reinterpret_cast<drivers::bluetooth::mac_addr_t*>(
+      lua_newuserdata(L, sizeof(drivers::bluetooth::mac_addr_t)));
+  *mac = dev.address;
+  lua_rawset(L, -3);
+
+  // What I just did there was perfectly safe. Look, I can prove it:
+  static_assert(
+      std::is_trivially_copy_assignable<drivers::bluetooth::mac_addr_t>());
+  static_assert(
+      std::is_trivially_destructible<drivers::bluetooth::mac_addr_t>());
+
+  lua_pushliteral(L, "name");
+  lua_pushlstring(L, dev.name.data(), dev.name.size());
+  lua_rawset(L, -3);
+
+  // FIXME: This field deserves a little more structure.
+  lua_pushliteral(L, "class");
+  lua_pushinteger(L, dev.class_of_device);
+  lua_rawset(L, -3);
+
+  lua_pushliteral(L, "signal_strength");
+  lua_pushinteger(L, dev.signal_strength);
+  lua_rawset(L, -3);
+}
+
 auto Property::PushValue(lua_State& s) -> int {
   std::visit(
       [&](auto&& arg) {
@@ -222,6 +253,16 @@ auto Property::PushValue(lua_State& s) -> int {
           lua_pushliteral(&s, "encoding");
           lua_pushstring(&s, codecs::StreamTypeToString(arg.encoding).c_str());
           lua_settable(&s, table);
+        } else if constexpr (std::is_same_v<T, drivers::bluetooth::Device>) {
+          pushDevice(&s, arg);
+        } else if constexpr (std::is_same_v<
+                                 T, std::vector<drivers::bluetooth::Device>>) {
+          lua_createtable(&s, arg.size(), 0);
+          size_t i = 1;
+          for (const auto& dev : arg) {
+            pushDevice(&s, dev);
+            lua_rawseti(&s, -2, i++);
+          }
         } else {
           static_assert(always_false_v<T>, "PushValue missing type");
         }
@@ -230,6 +271,34 @@ auto Property::PushValue(lua_State& s) -> int {
   return 1;
 }
 
+auto popRichType(lua_State* L) -> LuaValue {
+  lua_pushliteral(L, "address");
+  lua_gettable(L, -2);
+
+  if (lua_isuserdata(L, -1)) {
+    // This must be a bt device!
+    drivers::bluetooth::mac_addr_t mac =
+        *reinterpret_cast<drivers::bluetooth::mac_addr_t*>(
+            lua_touserdata(L, -1));
+    lua_pop(L, 1);
+
+    lua_pushliteral(L, "name");
+    lua_gettable(L, -2);
+
+    std::pmr::string name = lua_tostring(L, -1);
+    lua_pop(L, 1);
+
+    return drivers::bluetooth::Device{
+        .address = mac,
+        .name = name,
+        .class_of_device = 0,
+        .signal_strength = 0,
+    };
+  }
+
+  return std::monostate{};
+}
+
 auto Property::PopValue(lua_State& s) -> bool {
   LuaValue new_val;
   switch (lua_type(&s, 2)) {
@@ -250,8 +319,15 @@ auto Property::PopValue(lua_State& s) -> bool {
       new_val = lua_tostring(&s, 2);
       break;
     default:
+      if (lua_istable(&s, 2)) {
+        new_val = popRichType(&s);
+        if (std::holds_alternative<std::monostate>(new_val)) {
           return false;
         }
+      } else {
+        return false;
+      }
+  }
 
   if (cb_ && std::invoke(*cb_, new_val)) {
     Update(new_val);

src/system_fsm/CMakeLists.txt

@@ -3,7 +3,9 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
 idf_component_register(
-  SRCS "system_fsm.cpp" "running.cpp" "booting.cpp" "idle.cpp" "service_locator.cpp"
+  SRCS "system_fsm.cpp" "running.cpp" "booting.cpp" "idle.cpp"
+  "service_locator.cpp"
   INCLUDE_DIRS "include"
-  REQUIRES "tinyfsm" "drivers" "database" "ui" "result" "events" "audio" "app_console" "battery" "locale")
+  REQUIRES "tinyfsm" "drivers" "database" "ui" "result" "events" "audio"
+  "app_console" "battery" "locale")
 target_compile_options(${COMPONENT_LIB} PRIVATE ${EXTRA_WARNINGS})

src/system_fsm/booting.cpp

@@ -46,9 +46,7 @@ namespace states {
 [[maybe_unused]] static const char kTag[] = "BOOT";
 
 static auto bt_event_cb(drivers::bluetooth::Event ev) -> void {
-  if (ev == drivers::bluetooth::Event::kKnownDevicesChanged) {
+  events::Ui().Dispatch(BluetoothEvent{.event = ev});
-    events::Ui().Dispatch(BluetoothDevicesChanged{});
-  }
 }
 
 static const TickType_t kInterruptCheckPeriod = pdMS_TO_TICKS(100);

src/system_fsm/include/system_events.hpp

@@ -9,6 +9,7 @@
 #include <memory>
 
 #include "battery.hpp"
+#include "bluetooth_types.hpp"
 #include "database.hpp"
 #include "haptics.hpp"
 #include "service_locator.hpp"
@@ -54,7 +55,9 @@ struct BatteryStateChanged : tinyfsm::Event {
   battery::Battery::BatteryState new_state;
 };
 
-struct BluetoothDevicesChanged : tinyfsm::Event {};
+struct BluetoothEvent : tinyfsm::Event {
+  drivers::bluetooth::Event event;
+};
 
 struct HapticTrigger : tinyfsm::Event {
   drivers::Haptics::Effect effect;

src/ui/include/ui_fsm.hpp

@@ -50,39 +50,40 @@ class UiState : public tinyfsm::Fsm<UiState> {
   /* Fallback event handler. Does nothing. */
   void react(const tinyfsm::Event& ev) {}
 
-  virtual void react(const system_fsm::BatteryStateChanged&);
+  virtual void react(const OnLuaError&) {}
-  virtual void react(const audio::PlaybackStarted&);
+  virtual void react(const internal::BackPressed&) {}
-  virtual void react(const audio::PlaybackFinished&);
+  virtual void react(const system_fsm::BootComplete&) {}
-  virtual void react(const audio::PlaybackUpdate&);
+  virtual void react(const system_fsm::StorageMounted&) {}
-  virtual void react(const audio::QueueUpdate&);
 
-  virtual void react(const audio::VolumeChanged&);
+  void react(const system_fsm::BatteryStateChanged&);
-  virtual void react(const audio::VolumeBalanceChanged&);
+  void react(const audio::PlaybackStarted&);
-  virtual void react(const audio::VolumeLimitChanged&);
+  void react(const audio::PlaybackFinished&);
+  void react(const audio::PlaybackUpdate&);
+  void react(const audio::QueueUpdate&);
 
-  virtual void react(const system_fsm::KeyLockChanged&);
+  void react(const audio::VolumeChanged&);
-  virtual void react(const OnLuaError&) {}
+  void react(const audio::VolumeBalanceChanged&);
+  void react(const audio::VolumeLimitChanged&);
+
+  void react(const system_fsm::KeyLockChanged&);
+
+  void react(const internal::DismissAlerts&);
+  void react(const internal::ControlSchemeChanged&);
+
+  void react(const database::event::UpdateStarted&){};
+  void react(const database::event::UpdateProgress&){};
+  void react(const database::event::UpdateFinished&){};
+
+  void react(const system_fsm::BluetoothEvent&);
 
-  virtual void react(const internal::BackPressed&) {}
   virtual void react(const internal::ModalCancelPressed&) {
     sCurrentModal.reset();
   }
   virtual void react(const internal::ModalConfirmPressed&) {
     sCurrentModal.reset();
   }
-  void react(const internal::ControlSchemeChanged&);
-  virtual void react(const internal::ReindexDatabase&){};
-
-  void react(const internal::DismissAlerts&);
 
-  virtual void react(const database::event::UpdateStarted&){};
+  void react(const internal::ReindexDatabase&){};
-  virtual void react(const database::event::UpdateProgress&){};
-  virtual void react(const database::event::UpdateFinished&){};
-
-  virtual void react(const system_fsm::DisplayReady&) {}
-  virtual void react(const system_fsm::BootComplete&) {}
-  virtual void react(const system_fsm::StorageMounted&) {}
-  virtual void react(const system_fsm::BluetoothDevicesChanged&) {}
 
  protected:
   void PushScreen(std::shared_ptr<Screen>);
@@ -104,6 +105,9 @@ class UiState : public tinyfsm::Fsm<UiState> {
 
   static lua::Property sBluetoothEnabled;
   static lua::Property sBluetoothConnected;
+  static lua::Property sBluetoothPairedDevice;
+  static lua::Property sBluetoothDevices;
+  static lua::Property sBluetoothScanning;
 
   static lua::Property sPlaybackPlaying;
 
@@ -121,6 +125,9 @@ class UiState : public tinyfsm::Fsm<UiState> {
   static lua::Property sVolumeLimit;
 
   static lua::Property sDisplayBrightness;
+
+  static lua::Property sControlsScheme;
+  static lua::Property sControlSensitivity;
 };
 
 namespace states {

src/ui/ui_fsm.cpp

@@ -9,6 +9,7 @@
 #include <memory>
 #include <variant>
 
+#include "bluetooth_types.hpp"
 #include "freertos/portmacro.h"
 #include "freertos/projdefs.h"
 #include "lua.h"
@@ -73,8 +74,31 @@ lua::Property UiState::sBatteryPct{0};
 lua::Property UiState::sBatteryMv{0};
 lua::Property UiState::sBatteryCharging{false};
 
-lua::Property UiState::sBluetoothEnabled{false};
+lua::Property UiState::sBluetoothEnabled{
+    false, [](const lua::LuaValue& val) {
+      if (!std::holds_alternative<bool>(val)) {
+        return false;
+      }
+      if (std::get<bool>(val)) {
+        sServices->bluetooth().Enable();
+        sServices->bluetooth().SetDeviceDiscovery(true);
+      } else {
+        sServices->bluetooth().Disable();
+      }
+      return true;
+    }};
 lua::Property UiState::sBluetoothConnected{false};
+lua::Property UiState::sBluetoothPairedDevice{
+    std::monostate{}, [](const lua::LuaValue& val) {
+      if (std::holds_alternative<drivers::bluetooth::Device>(val)) {
+        auto dev = std::get<drivers::bluetooth::Device>(val);
+        sServices->bluetooth().SetPreferredDevice(dev.address);
+      }
+      return false;
+    }};
+lua::Property UiState::sBluetoothDevices{
+    std::vector<drivers::bluetooth::Device>{}};
+lua::Property UiState::sBluetoothScanning{false};
 
 lua::Property UiState::sPlaybackPlaying{
     false, [](const lua::LuaValue& val) {
@@ -99,38 +123,92 @@ lua::Property UiState::sQueueRandom{false};
 
 lua::Property UiState::sVolumeCurrentPct{
     0, [](const lua::LuaValue& val) {
+      if (!std::holds_alternative<int>(val)) {
+        return false;
+      }
       events::Audio().Dispatch(audio::SetVolume{
-          .percent = {},
+          .percent = std::get<int>(val),
-          .db = 0,
+          .db = {},
       });
-      return false;
+      return true;
     }};
 lua::Property UiState::sVolumeCurrentDb{
     0, [](const lua::LuaValue& val) {
+      if (!std::holds_alternative<int>(val)) {
+        return false;
+      }
       events::Audio().Dispatch(audio::SetVolume{
           .percent = {},
-          .db = 0,
+          .db = std::get<int>(val),
       });
-      return false;
+      return true;
     }};
 lua::Property UiState::sVolumeLeftBias{
     0, [](const lua::LuaValue& val) {
+      if (!std::holds_alternative<int>(val)) {
+        return false;
+      }
       events::Audio().Dispatch(audio::SetVolumeBalance{
-          .left_bias = 0,
+          .left_bias = std::get<int>(val),
       });
-      return false;
+      return true;
     }};
 lua::Property UiState::sVolumeLimit{
     0, [](const lua::LuaValue& val) {
+      if (!std::holds_alternative<int>(val)) {
+        return false;
+      }
+      int limit = std::get<int>(val);
       events::Audio().Dispatch(audio::SetVolumeLimit{
-          .new_limit = 0,
+          .limit_db = limit,
       });
+      return true;
+    }};
+
+lua::Property UiState::sDisplayBrightness{
+    0, [](const lua::LuaValue& val) {
+      std::optional<int> brightness = 0;
+      std::visit(
+          [&](auto&& v) {
+            using T = std::decay_t<decltype(v)>;
+            if constexpr (std::is_same_v<T, int>) {
+              brightness = v;
+            }
+          },
+          val);
+      if (!brightness) {
         return false;
+      }
+      sDisplay->SetBrightness(*brightness);
+      sServices->nvs().ScreenBrightness(*brightness);
+      return true;
     }};
 
-lua::Property UiState::sDisplayBrightness{0, [](const lua::LuaValue& val) {
+lua::Property UiState::sControlsScheme{
-                                            sDisplay->SetBrightness(0);
+    0, [](const lua::LuaValue& val) {
+      if (!std::holds_alternative<int>(val)) {
         return false;
+      }
+      drivers::NvsStorage::InputModes mode;
+      switch (std::get<int>(val)) {
+        case 0:
+          mode = drivers::NvsStorage::InputModes::kButtonsOnly;
+          break;
+        case 1:
+          mode = drivers::NvsStorage::InputModes::kButtonsWithWheel;
+          break;
+        case 2:
+          mode = drivers::NvsStorage::InputModes::kDirectionalWheel;
+          break;
+        case 3:
+          mode = drivers::NvsStorage::InputModes::kRotatingWheel;
+          break;
+        default:
+          return false;
+      }
+      sServices->nvs().PrimaryInput(mode);
+      sInput->mode(mode);
+      return true;
     }};
 
 auto UiState::InitBootSplash(drivers::IGpios& gpios) -> bool {
@@ -223,7 +301,29 @@ void UiState::react(const audio::VolumeBalanceChanged& ev) {
 }
 
 void UiState::react(const audio::VolumeLimitChanged& ev) {
-  sVolumeLeftBias.Update(ev.new_limit);
+  sVolumeLimit.Update(ev.new_limit_db);
+}
+
+void UiState::react(const system_fsm::BluetoothEvent& ev) {
+  auto bt = sServices->bluetooth();
+  switch (ev.event) {
+    case drivers::bluetooth::Event::kKnownDevicesChanged:
+      sBluetoothDevices.Update(bt.KnownDevices());
+      break;
+    case drivers::bluetooth::Event::kConnectionStateChanged:
+      sBluetoothConnected.Update(bt.IsConnected());
+      if (bt.ConnectedDevice()) {
+        sBluetoothPairedDevice.Update(bt.ConnectedDevice().value());
+      } else {
+        sBluetoothPairedDevice.Update(std::monostate{});
+      }
+      break;
+    case drivers::bluetooth::Event::kDiscoveryChanged:
+      sBluetoothScanning.Update(bt.IsDiscovering());
+      break;
+    case drivers::bluetooth::Event::kPreferredDeviceChanged:
+      break;
+  }
 }
 
 namespace states {
@@ -245,12 +345,18 @@ void Splash::react(const system_fsm::BootComplete& ev) {
   lv_disp_set_theme(NULL, base_theme);
   themes::Theme::instance()->Apply();
 
-  sDisplay->SetBrightness(sServices->nvs().ScreenBrightness());
+  int brightness = sServices->nvs().ScreenBrightness();
+  sDisplayBrightness.Update(brightness);
+  sDisplay->SetBrightness(brightness);
 
   auto touchwheel = sServices->touchwheel();
   if (touchwheel) {
     sInput = std::make_shared<EncoderInput>(sServices->gpios(), **touchwheel);
-    sInput->mode(sServices->nvs().PrimaryInput());
+
+    auto mode = sServices->nvs().PrimaryInput();
+    sInput->mode(mode);
+    sControlsScheme.Update(static_cast<int>(mode));
+
     sTask->input(sInput);
   } else {
     ESP_LOGE(kTag, "no input devices initialised!");
@@ -274,10 +380,12 @@ void Lua::entry() {
                                          {"battery_millivolts", &sBatteryMv},
                                          {"plugged_in", &sBatteryCharging},
                                      });
-    sLua->bridge().AddPropertyModule("bluetooth",
+    sLua->bridge().AddPropertyModule(
-                                     {
+        "bluetooth", {
                          {"enabled", &sBluetoothEnabled},
                          {"connected", &sBluetoothConnected},
+                         {"paired_device", &sBluetoothPairedDevice},
+                         {"devices", &sBluetoothDevices},
                      });
     sLua->bridge().AddPropertyModule("playback",
                                      {
@@ -299,6 +407,16 @@ void Lua::entry() {
                                          {"limit_db", &sVolumeLimit},
                                      });
 
+    sLua->bridge().AddPropertyModule("display",
+                                     {
+                                         {"brightness", &sDisplayBrightness},
+                                     });
+
+    sLua->bridge().AddPropertyModule("controls",
+                                     {
+                                         {"scheme", &sControlsScheme},
+                                     });
+
     sLua->bridge().AddPropertyModule(
         "backstack",
         {
@@ -311,6 +429,15 @@ void Lua::entry() {
                       {"hide", [&](lua_State* s) { return HideAlert(s); }},
                   });
 
+    auto bt = sServices->bluetooth();
+    sBluetoothEnabled.Update(bt.IsEnabled());
+    sBluetoothConnected.Update(bt.IsConnected());
+    if (bt.ConnectedDevice()) {
+      sBluetoothPairedDevice.Update(bt.ConnectedDevice().value());
+    }
+    sBluetoothDevices.Update(bt.KnownDevices());
+    sBluetoothScanning.Update(bt.IsDiscovering());
+
     sCurrentScreen.reset();
     sLua->RunScript("/lua/main.lua");
   }