Add "Find my phone" app.

doc/ble.md

@@ -14,6 +14,8 @@ This page describes the BLE implementation and API built in this firmware.
 - [BLE Services](#ble-services)
   - [CTS](#cts)
   - [ANS](#ans)
+- [BLE Clients](#ble-clients)
+  - [IAC](#iac)
 - [Getting Information](#getting-information)
   - [Firmware Version](#firmware-version)
   - [Battery Level](#battery-level)
@@ -113,6 +115,16 @@ The following custom services are implemented in InfiniTime:
 
 ![ANS sequence diagram](./ble/ans_sequence.png "ANS sequence diagram")
 
+## BLE clients
+
+### IAC
+
+InfiniTime implements an Immediate Alert Service client, which can be used to send alerts to the companion app.
+This is useful for "Find my Phone" functionality.
+
+More documentation about this service can be found here.
+
+[Immediate Alert Service](https://www.bluetooth.com/specifications/specs/immediate-alert-service-1-0/)
 ---
 
 ### Getting Information

src/CMakeLists.txt

@@ -386,6 +386,7 @@ list(APPEND SOURCE_FILES
         displayapp/screens/Notifications.cpp
         displayapp/screens/Twos.cpp
         displayapp/screens/HeartRate.cpp
+        displayapp/screens/FindMyPhone.cpp
         displayapp/screens/FlashLight.cpp
         displayapp/screens/List.cpp
         displayapp/screens/CheckboxList.cpp
@@ -461,6 +462,7 @@ list(APPEND SOURCE_FILES
         components/ble/BatteryInformationService.cpp
         components/ble/FSService.cpp
         components/ble/ImmediateAlertService.cpp
+        components/ble/ImmediateAlertClient.cpp
         components/ble/ServiceDiscovery.cpp
         components/ble/HeartRateService.cpp
         components/ble/MotionService.cpp
@@ -530,6 +532,7 @@ list(APPEND RECOVERY_SOURCE_FILES
         components/ble/BatteryInformationService.cpp
         components/ble/FSService.cpp
         components/ble/ImmediateAlertService.cpp
+        components/ble/ImmediateAlertClient.cpp
         components/ble/ServiceDiscovery.cpp
         components/ble/NavigationService.cpp
         components/ble/HeartRateService.cpp
@@ -610,6 +613,7 @@ set(INCLUDE_FILES
         displayapp/Apps.h
         displayapp/screens/Notifications.h
         displayapp/screens/HeartRate.h
+        displayapp/screens/FindMyPhone.h
         displayapp/screens/Metronome.h
         displayapp/screens/Motion.h
         displayapp/screens/Timer.h
@@ -649,6 +653,7 @@ set(INCLUDE_FILES
         components/ble/BatteryInformationService.h
         components/ble/FSService.h
         components/ble/ImmediateAlertService.h
+        components/ble/ImmediateAlertClient.h
         components/ble/ServiceDiscovery.h
         components/ble/BleClient.h
         components/ble/HeartRateService.h
@@ -841,7 +846,7 @@ if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
   # add_definitions(-DCLOCK_CONFIG_LOG_LEVEL=4)
   # add_definitions(-DRTC_CONFIG_LOG_ENABLED=1)
   # add_definitions(-DRTC_CONFIG_LOG_LEVEL=4)
-  
+
   # Nimble Logging
   add_definitions(-DMYNEWT_VAL_NEWT_FEATURE_LOGCFG=1)
   # add_definitions(-DMYNEWT_VAL_LOG_LEVEL=0)

src/components/ble/ImmediateAlertClient.cpp

@@ -0,0 +1,114 @@
+#include "components/ble/ImmediateAlertClient.h"
+#include <cstring>
+#include <nrf_log.h>
+#include "systemtask/SystemTask.h"
+
+using namespace Pinetime::Controllers;
+
+constexpr ble_uuid16_t ImmediateAlertClient::immediateAlertClientUuid;
+constexpr ble_uuid16_t ImmediateAlertClient::alertLevelCharacteristicUuid;
+
+ImmediateAlertClient::ImmediateAlertClient(Pinetime::System::SystemTask& systemTask) : systemTask {systemTask} {
+}
+
+void ImmediateAlertClient::Init() {
+}
+
+bool ImmediateAlertClient::OnDiscoveryEvent(uint16_t connectionHandle, const ble_gatt_error* error, const ble_gatt_svc* service) {
+  if (service == nullptr && error->status == BLE_HS_EDONE) {
+    if (iasHandles.has_value()) {
+      NRF_LOG_INFO("[IAS] service found, starting characteristics discovery");
+
+      ble_gattc_disc_all_chrs(connectionHandle,
+                              iasHandles->startHandle,
+                              iasHandles->endHandle,
+                              OnImmediateAlertCharacteristicDiscoveredCallback,
+                              this);
+    } else {
+      NRF_LOG_INFO("[IAS] service not found");
+      onServiceDiscovered(connectionHandle);
+    }
+    return true;
+  }
+
+  if (service != nullptr && ble_uuid_cmp(&immediateAlertClientUuid.u, &service->uuid.u) == 0) {
+    NRF_LOG_INFO("[IAS] discovered : 0x%x - 0x%x", service->start_handle, service->end_handle);
+    iasHandles.emplace(HandleRange {
+      .startHandle = service->start_handle,
+      .endHandle = service->end_handle,
+    });
+  }
+  return false;
+}
+
+int ImmediateAlertClient::OnCharacteristicDiscoveryEvent(uint16_t conn_handle,
+                                                         const ble_gatt_error* error,
+                                                         const ble_gatt_chr* characteristic) {
+
+  if (error->status != 0 && error->status != BLE_HS_EDONE) {
+    NRF_LOG_INFO("[IAS] Characteristic discovery ERROR");
+    onServiceDiscovered(conn_handle);
+    return 0;
+  }
+
+  if (characteristic == nullptr && error->status == BLE_HS_EDONE) {
+    if (!alertLevelHandle.has_value()) {
+      NRF_LOG_INFO("[IAS] Alert level characteristic not found.");
+      onServiceDiscovered(conn_handle);
+    }
+
+    return 0;
+  }
+
+  if (characteristic != nullptr && ble_uuid_cmp(&alertLevelCharacteristicUuid.u, &characteristic->uuid.u) == 0) {
+    NRF_LOG_INFO("[IAS] Characteristic discovered : 0x%x", characteristic->val_handle);
+    alertLevelHandle = characteristic->val_handle;
+    state = State::Connected;
+  }
+  return 0;
+}
+
+void ImmediateAlertClient::Discover(uint16_t connectionHandle, std::function<void(uint16_t)> onServiceDiscovered) {
+  NRF_LOG_INFO("[IAS] Starting discovery");
+  this->onServiceDiscovered = onServiceDiscovered;
+  state = State::NoIAS;
+  ble_gattc_disc_svc_by_uuid(connectionHandle, &immediateAlertClientUuid.u, OnDiscoveryEventCallback, this);
+}
+
+void ImmediateAlertClient::Reset() {
+  state = State::NoConnection;
+  iasHandles = std::nullopt;
+  alertLevelHandle = std::nullopt;
+}
+
+bool ImmediateAlertClient::SendImmediateAlert(ImmediateAlertClient::Levels level) {
+
+  auto* om = ble_hs_mbuf_from_flat(&level, 1);
+
+  uint16_t connectionHandle = systemTask.nimble().connHandle();
+
+  if (connectionHandle == 0 || connectionHandle == BLE_HS_CONN_HANDLE_NONE) {
+    return false;
+  }
+  if (!alertLevelHandle.has_value()) {
+    return false;
+  }
+
+  return ble_gattc_write_no_rsp(connectionHandle, *alertLevelHandle, om) == 0;
+}
+
+int ImmediateAlertClient::OnDiscoveryEventCallback(uint16_t conn_handle,
+                                                   const struct ble_gatt_error* error,
+                                                   const struct ble_gatt_svc* service,
+                                                   void* arg) {
+  auto client = static_cast<ImmediateAlertClient*>(arg);
+  return client->OnDiscoveryEvent(conn_handle, error, service);
+}
+
+int ImmediateAlertClient::OnImmediateAlertCharacteristicDiscoveredCallback(uint16_t conn_handle,
+                                                                           const struct ble_gatt_error* error,
+                                                                           const struct ble_gatt_chr* chr,
+                                                                           void* arg) {
+  auto client = static_cast<ImmediateAlertClient*>(arg);
+  return client->OnCharacteristicDiscoveryEvent(conn_handle, error, chr);
+}

src/components/ble/ImmediateAlertClient.h

@@ -0,0 +1,77 @@
+#pragma once
+#define min // workaround: nimble's min/max macros conflict with libstdc++
+#define max
+#include <host/ble_gap.h>
+#undef max
+#undef min
+#include <cstdint>
+#include "components/ble/BleClient.h"
+
+namespace Pinetime {
+  namespace System {
+    class SystemTask;
+  }
+
+  namespace Controllers {
+    class NotificationManager;
+
+    class ImmediateAlertClient : public BleClient {
+    public:
+      enum class Levels : uint8_t { NoAlert = 0, MildAlert = 1, HighAlert = 2 };
+      enum class State {
+        NoConnection,
+        NoIAS,
+        Connected,
+      };
+
+      explicit ImmediateAlertClient(Pinetime::System::SystemTask& systemTask);
+      void Init();
+
+      bool SendImmediateAlert(Levels level);
+
+      State GetState() const {
+        return state;
+      }
+
+      void Discover(uint16_t connectionHandle, std::function<void(uint16_t)> lambda) override;
+      void Reset();
+
+    private:
+      bool OnDiscoveryEvent(uint16_t connectionHandle, const ble_gatt_error* error, const ble_gatt_svc* service);
+      int OnCharacteristicDiscoveryEvent(uint16_t conn_handle, const ble_gatt_error* error, const ble_gatt_chr* characteristic);
+
+      static constexpr const ble_uuid16_t* Uuid() {
+        return &ImmediateAlertClient::immediateAlertClientUuid;
+      }
+
+      static constexpr const ble_uuid16_t* AlertLevelCharacteristicUuid() {
+        return &ImmediateAlertClient::alertLevelCharacteristicUuid;
+      }
+
+      static int
+      OnDiscoveryEventCallback(uint16_t conn_handle, const struct ble_gatt_error* error, const struct ble_gatt_svc* service, void* arg);
+      static int OnImmediateAlertCharacteristicDiscoveredCallback(uint16_t conn_handle,
+                                                                  const struct ble_gatt_error* error,
+                                                                  const struct ble_gatt_chr* chr,
+                                                                  void* arg);
+
+      Pinetime::System::SystemTask& systemTask;
+
+      static constexpr uint16_t immediateAlertClientId {0x1802};
+      static constexpr uint16_t alertLevelId {0x2A06};
+
+      static constexpr ble_uuid16_t immediateAlertClientUuid {.u {.type = BLE_UUID_TYPE_16}, .value = immediateAlertClientId};
+      static constexpr ble_uuid16_t alertLevelCharacteristicUuid {.u {.type = BLE_UUID_TYPE_16}, .value = alertLevelId};
+
+      struct HandleRange {
+        uint16_t startHandle;
+        uint16_t endHandle;
+      };
+
+      std::optional<HandleRange> iasHandles;
+      std::optional<uint16_t> alertLevelHandle;
+      std::function<void(uint16_t)> onServiceDiscovered;
+      State state {State::NoConnection};
+    };
+  }
+}

src/components/ble/NimbleController.cpp

@@ -46,10 +46,11 @@ NimbleController::NimbleController(Pinetime::System::SystemTask& systemTask,
     weatherService {dateTimeController},
     batteryInformationService {batteryController},
     immediateAlertService {systemTask, notificationManager},
+    iaClient {systemTask},
     heartRateService {*this, heartRateController},
     motionService {*this, motionController},
     fsService {systemTask, fs},
-    serviceDiscovery({&currentTimeClient, &alertNotificationClient}) {
+    serviceDiscovery({&currentTimeClient, &alertNotificationClient, &iaClient}) {
 }
 
 void nimble_on_reset(int reason) {
@@ -95,6 +96,7 @@ void NimbleController::Init() {
   dfuService.Init();
   batteryInformationService.Init();
   immediateAlertService.Init();
+  iaClient.Init();
   heartRateService.Init();
   motionService.Init();
   fsService.Init();
@@ -200,6 +202,7 @@ int NimbleController::OnGAPEvent(ble_gap_event* event) {
         /* Connection failed; resume advertising. */
         currentTimeClient.Reset();
         alertNotificationClient.Reset();
+        iaClient.Reset();
         connectionHandle = BLE_HS_CONN_HANDLE_NONE;
         bleController.Disconnect();
         fastAdvCount = 0;
@@ -223,6 +226,7 @@ int NimbleController::OnGAPEvent(ble_gap_event* event) {
 
       currentTimeClient.Reset();
       alertNotificationClient.Reset();
+      iaClient.Reset();
       connectionHandle = BLE_HS_CONN_HANDLE_NONE;
       if (bleController.IsConnected()) {
         bleController.Disconnect();

src/components/ble/NimbleController.h

@@ -17,6 +17,7 @@
 #include "components/ble/FSService.h"
 #include "components/ble/HeartRateService.h"
 #include "components/ble/ImmediateAlertService.h"
+#include "components/ble/ImmediateAlertClient.h"
 #include "components/ble/MusicService.h"
 #include "components/ble/NavigationService.h"
 #include "components/ble/ServiceDiscovery.h"
@@ -71,6 +72,10 @@ namespace Pinetime {
         return weatherService;
       };
 
+      Pinetime::Controllers::ImmediateAlertClient& immediateAlertClient() {
+        return iaClient;
+      }
+
       uint16_t connHandle();
       void NotifyBatteryLevel(uint8_t level);
 
@@ -103,6 +108,7 @@ namespace Pinetime {
       NavigationService navService;
       BatteryInformationService batteryInformationService;
       ImmediateAlertService immediateAlertService;
+      ImmediateAlertClient iaClient;
       HeartRateService heartRateService;
       MotionService motionService;
       FSService fsService;

src/components/ble/ServiceDiscovery.cpp

@@ -4,7 +4,7 @@
 
 using namespace Pinetime::Controllers;
 
-ServiceDiscovery::ServiceDiscovery(std::array<BleClient*, 2>&& clients) : clients {clients} {
+ServiceDiscovery::ServiceDiscovery(std::array<BleClient*, 3>&& clients) : clients {clients} {
 }
 
 void ServiceDiscovery::StartDiscovery(uint16_t connectionHandle) {
@@ -29,4 +29,4 @@ void ServiceDiscovery::DiscoverNextService(uint16_t connectionHandle) {
     this->OnServiceDiscovered(connectionHandle);
   };
   (*clientIterator)->Discover(connectionHandle, discoverNextService);
-}
+}

src/components/ble/ServiceDiscovery.h

@@ -9,13 +9,13 @@ namespace Pinetime {
 
     class ServiceDiscovery {
     public:
-      ServiceDiscovery(std::array<BleClient*, 2>&& bleClients);
+      ServiceDiscovery(std::array<BleClient*, 3>&& bleClients);
 
       void StartDiscovery(uint16_t connectionHandle);
 
     private:
       BleClient** clientIterator;
-      std::array<BleClient*, 2> clients;
+      std::array<BleClient*, 3> clients;
       void OnServiceDiscovered(uint16_t connectionHandle);
       void DiscoverNextService(uint16_t connectionHandle);
     };

src/displayapp/DisplayApp.cpp

@@ -1,6 +1,7 @@
 #include "displayapp/DisplayApp.h"
 #include <libraries/log/nrf_log.h>
 #include "displayapp/screens/HeartRate.h"
+#include "displayapp/screens/FindMyPhone.h"
 #include "displayapp/screens/Motion.h"
 #include "displayapp/screens/Timer.h"
 #include "displayapp/screens/Alarm.h"

src/displayapp/apps/Apps.h.in

@@ -43,6 +43,7 @@ namespace Pinetime {
       SettingChimes,
       SettingShakeThreshold,
       SettingBluetooth,
+      FindMyPhone,
       Error
     };
 

src/displayapp/apps/CMakeLists.txt

@@ -14,6 +14,7 @@ else ()
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Metronome")
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Navigation")
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Calculator")
+    set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::FindMyPhone")
     set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Weather")
     #set(DEFAULT_USER_APP_TYPES "${DEFAULT_USER_APP_TYPES}, Apps::Motion")
     set(USERAPP_TYPES "${DEFAULT_USER_APP_TYPES}" CACHE STRING "List of user apps to build into the firmware")

src/displayapp/fonts/fonts.json

@@ -7,7 +7,7 @@
          },
          {
             "file": "FontAwesome5-Solid+Brands+Regular.woff",
-            "range": "0xf294, 0xf242, 0xf54b, 0xf21e, 0xf1e6, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024, 0xf252, 0xf569, 0xf06e, 0xf015, 0xf00c, 0xf0f3, 0xf522, 0xf743, 0xf1ec, 0xf55a"
+            "range": "0xf294, 0xf242, 0xf54b, 0xf21e, 0xf1e6, 0xf017, 0xf129, 0xf03a, 0xf185, 0xf560, 0xf001, 0xf3fd, 0xf1fc, 0xf45d, 0xf59f, 0xf5a0, 0xf027, 0xf028, 0xf6a9, 0xf04b, 0xf04c, 0xf048, 0xf051, 0xf095, 0xf3dd, 0xf04d, 0xf2f2, 0xf024, 0xf252, 0xf569, 0xf06e, 0xf015, 0xf00c, 0xf0f3, 0xf522, 0xf743, 0xf1ec, 0xf55a, 0xf002"
          }
       ],
       "bpp": 1,