examples/lock-app/nrfconnect/main/AppTask.cpp - third_party/github/project-chip/connectedhomeip - Git at Google

 /*
  *
  *    Copyright (c) 2020 Project CHIP Authors
  *    All rights reserved.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
  *    You may obtain a copy of the License at
  *
  *        http://www.apache.org/licenses/LICENSE-2.0
  *
  *    Unless required by applicable law or agreed to in writing, software
  *    distributed under the License is distributed on an "AS IS" BASIS,
  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *    See the License for the specific language governing permissions and
  *    limitations under the License.
  */

 #include "AppTask.h"
 #include "AppConfig.h"
 #include "BoltLockManager.h"
 #include "LEDWidget.h"
 #include "ThreadUtil.h"

 #include <app-common/zap-generated/attribute-id.h>
 #include <app-common/zap-generated/attribute-type.h>
 #include <app-common/zap-generated/attributes/Accessors.h>
 #include <app-common/zap-generated/cluster-id.h>
 #include <app/server/OnboardingCodesUtil.h>
 #include <app/server/Server.h>
 #include <credentials/DeviceAttestationCredsProvider.h>
 #include <credentials/examples/DeviceAttestationCredsExample.h>
 #include <lib/support/CHIPMem.h>
 #include <lib/support/CodeUtils.h>
 #include <lib/support/ErrorStr.h>
 #include <system/SystemClock.h>

 #if CONFIG_CHIP_OTA_REQUESTOR
 #include "OTAUtil.h"
 #include <app/clusters/ota-requestor/BDXDownloader.h>
 #include <app/clusters/ota-requestor/DefaultOTARequestorStorage.h>
 #include <app/clusters/ota-requestor/GenericOTARequestorDriver.h>
 #include <app/clusters/ota-requestor/OTARequestor.h>
 #endif

 #include <dk_buttons_and_leds.h>
 #include <logging/log.h>
 #include <zephyr.h>

 using namespace ::chip;
 using namespace ::chip::app;
 using namespace ::chip::Credentials;
 using namespace ::chip::DeviceLayer;

 #define FACTORY_RESET_TRIGGER_TIMEOUT 3000
 #define FACTORY_RESET_CANCEL_WINDOW_TIMEOUT 3000
 #define APP_EVENT_QUEUE_SIZE 10
 #define BUTTON_PUSH_EVENT 1
 #define BUTTON_RELEASE_EVENT 0

 namespace {
 constexpr EndpointId kLockEndpointId = 1;

 LOG_MODULE_DECLARE(app);
 K_MSGQ_DEFINE(sAppEventQueue, sizeof(AppEvent), APP_EVENT_QUEUE_SIZE, alignof(AppEvent));
 k_timer sFunctionTimer;

 LEDWidget sStatusLED;
 LEDWidget sLockLED;
 LEDWidget sUnusedLED;
 LEDWidget sUnusedLED_1;

 bool sIsThreadProvisioned = false;
 bool sIsThreadEnabled     = false;
 bool sHaveBLEConnections  = false;

 #if CONFIG_CHIP_OTA_REQUESTOR
 DefaultOTARequestorStorage sRequestorStorage;
 GenericOTARequestorDriver sOTARequestorDriver;
 chip::BDXDownloader sBDXDownloader;
 chip::OTARequestor sOTARequestor;
 #endif

 } // namespace

 AppTask AppTask::sAppTask;

 CHIP_ERROR AppTask::Init()
 {
     // Initialize CHIP stack
     LOG_INF("Init CHIP stack");

     CHIP_ERROR err = chip::Platform::MemoryInit();
     if (err != CHIP_NO_ERROR)
     {
         LOG_ERR("Platform::MemoryInit() failed");
         return err;
     }

     err = PlatformMgr().InitChipStack();
     if (err != CHIP_NO_ERROR)
     {
         LOG_ERR("PlatformMgr().InitChipStack() failed");
         return err;
     }

     err = ThreadStackMgr().InitThreadStack();
     if (err != CHIP_NO_ERROR)
     {
         LOG_ERR("ThreadStackMgr().InitThreadStack() failed");
         return err;
     }

 #ifdef CONFIG_OPENTHREAD_MTD_SED
     err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_SleepyEndDevice);
 #elif CONFIG_OPENTHREAD_MTD
     err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_MinimalEndDevice);
 #else
     err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_FullEndDevice);
 #endif
     if (err != CHIP_NO_ERROR)
     {
         LOG_ERR("ConnectivityMgr().SetThreadDeviceType() failed");
         return err;
     }

     // Initialize LEDs
     LEDWidget::InitGpio();
     LEDWidget::SetStateUpdateCallback(LEDStateUpdateHandler);

     sStatusLED.Init(SYSTEM_STATE_LED);
     sLockLED.Init(LOCK_STATE_LED);
     sLockLED.Set(!BoltLockMgr().IsUnlocked());

     sUnusedLED.Init(DK_LED3);
     sUnusedLED_1.Init(DK_LED4);

     UpdateStatusLED();

     BoltLockMgr().Init();
     BoltLockMgr().SetCallbacks(ActionInitiated, ActionCompleted);

     // Initialize buttons
     int ret = dk_buttons_init(ButtonEventHandler);
     if (ret)
     {
         LOG_ERR("dk_buttons_init() failed");
         return chip::System::MapErrorZephyr(ret);
     }

     // Initialize function button timer
     k_timer_init(&sFunctionTimer, &AppTask::TimerEventHandler, nullptr);
     k_timer_user_data_set(&sFunctionTimer, this);

 #ifdef CONFIG_MCUMGR_SMP_BT
     // Initialize DFU over SMP
     GetDFUOverSMP().Init(RequestSMPAdvertisingStart);
     GetDFUOverSMP().ConfirmNewImage();
 #endif

     // Initialize CHIP server
     SetDeviceAttestationCredentialsProvider(Examples::GetExampleDACProvider());
     InitOTARequestor();
     ReturnErrorOnFailure(chip::Server::GetInstance().Init());
     ConfigurationMgr().LogDeviceConfig();
     PrintOnboardingCodes(chip::RendezvousInformationFlags(chip::RendezvousInformationFlag::kBLE));

     // Add CHIP event handler and start CHIP thread.
     // Note that all the initialization code should happen prior to this point to avoid data races
     // between the main and the CHIP threads.
     PlatformMgr().AddEventHandler(ChipEventHandler, 0);

     err = PlatformMgr().StartEventLoopTask();
     if (err != CHIP_NO_ERROR)
     {
         LOG_ERR("PlatformMgr().StartEventLoopTask() failed");
     }

     return err;
 }

 void AppTask::InitOTARequestor()
 {
 #if CONFIG_CHIP_OTA_REQUESTOR
     OTAImageProcessorNrf::Get().SetOTADownloader(&sBDXDownloader);
     sBDXDownloader.SetImageProcessorDelegate(&OTAImageProcessorNrf::Get());
     sOTARequestorDriver.Init(&sOTARequestor, &OTAImageProcessorNrf::Get());
     sRequestorStorage.Init(Server::GetInstance().GetPersistentStorage());
     sOTARequestor.Init(Server::GetInstance(), sRequestorStorage, sOTARequestorDriver, sBDXDownloader);
     chip::SetRequestorInstance(&sOTARequestor);
 #endif
 }

 CHIP_ERROR AppTask::StartApp()
 {
     ReturnErrorOnFailure(Init());

     AppEvent event = {};

     while (true)
     {
         k_msgq_get(&sAppEventQueue, &event, K_FOREVER);
         DispatchEvent(&event);
     }

     return CHIP_NO_ERROR;
 }

 void AppTask::LockActionEventHandler(AppEvent * aEvent)
 {
     BoltLockManager::Action_t action = BoltLockManager::INVALID_ACTION;
     int32_t actor                    = 0;

     if (aEvent->Type == AppEvent::kEventType_Lock)
     {
         action = static_cast<BoltLockManager::Action_t>(aEvent->LockEvent.Action);
         actor  = aEvent->LockEvent.Actor;
     }
     else if (aEvent->Type == AppEvent::kEventType_Button)
     {
         action = BoltLockMgr().IsUnlocked() ? BoltLockManager::LOCK_ACTION : BoltLockManager::UNLOCK_ACTION;
         actor  = AppEvent::kEventType_Button;
     }

     if (action != BoltLockManager::INVALID_ACTION && !BoltLockMgr().InitiateAction(actor, action))
         LOG_INF("Action is already in progress or active.");
 }

 void AppTask::ButtonEventHandler(uint32_t button_state, uint32_t has_changed)
 {
     AppEvent button_event;
     button_event.Type = AppEvent::kEventType_Button;

     if (LOCK_BUTTON_MASK & button_state & has_changed)
     {
         button_event.ButtonEvent.PinNo  = LOCK_BUTTON;
         button_event.ButtonEvent.Action = BUTTON_PUSH_EVENT;
         button_event.Handler            = LockActionEventHandler;
         sAppTask.PostEvent(&button_event);
     }

     if (FUNCTION_BUTTON_MASK & has_changed)
     {
         button_event.ButtonEvent.PinNo  = FUNCTION_BUTTON;
         button_event.ButtonEvent.Action = (FUNCTION_BUTTON_MASK & button_state) ? BUTTON_PUSH_EVENT : BUTTON_RELEASE_EVENT;
         button_event.Handler            = FunctionHandler;
         sAppTask.PostEvent(&button_event);
     }

     if (THREAD_START_BUTTON_MASK & button_state & has_changed)
     {
         button_event.ButtonEvent.PinNo  = THREAD_START_BUTTON;
         button_event.ButtonEvent.Action = BUTTON_PUSH_EVENT;
         button_event.Handler            = StartThreadHandler;
         sAppTask.PostEvent(&button_event);
     }

     if (BLE_ADVERTISEMENT_START_BUTTON_MASK & button_state & has_changed)
     {
         button_event.ButtonEvent.PinNo  = BLE_ADVERTISEMENT_START_BUTTON;
         button_event.ButtonEvent.Action = BUTTON_PUSH_EVENT;
         button_event.Handler            = StartBLEAdvertisementHandler;
         sAppTask.PostEvent(&button_event);
     }
 }

 void AppTask::TimerEventHandler(k_timer * timer)
 {
     AppEvent event;
     event.Type               = AppEvent::kEventType_Timer;
     event.TimerEvent.Context = k_timer_user_data_get(timer);
     event.Handler            = FunctionTimerEventHandler;
     sAppTask.PostEvent(&event);
 }

 void AppTask::FunctionTimerEventHandler(AppEvent * aEvent)
 {
     if (aEvent->Type != AppEvent::kEventType_Timer)
         return;

     // If we reached here, the button was held past FACTORY_RESET_TRIGGER_TIMEOUT, initiate factory reset
     if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_SoftwareUpdate)
     {
         LOG_INF("Factory Reset Triggered. Release button within %ums to cancel.", FACTORY_RESET_TRIGGER_TIMEOUT);

         // Start timer for FACTORY_RESET_CANCEL_WINDOW_TIMEOUT to allow user to cancel, if required.
         sAppTask.StartTimer(FACTORY_RESET_CANCEL_WINDOW_TIMEOUT);
         sAppTask.mFunction = kFunction_FactoryReset;

 #ifdef CONFIG_STATE_LEDS
         // Turn off all LEDs before starting blink to make sure blink is co-ordinated.
         sStatusLED.Set(false);
         sLockLED.Set(false);
         sUnusedLED_1.Set(false);
         sUnusedLED.Set(false);

         sStatusLED.Blink(500);
         sLockLED.Blink(500);
         sUnusedLED.Blink(500);
         sUnusedLED_1.Blink(500);
 #endif
     }
     else if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_FactoryReset)
     {
         // Actually trigger Factory Reset
         sAppTask.mFunction = kFunction_NoneSelected;

         chip::Server::GetInstance().ScheduleFactoryReset();
     }
 }

 #ifdef CONFIG_MCUMGR_SMP_BT
 void AppTask::RequestSMPAdvertisingStart(void)
 {
     AppEvent event;
     event.Type    = AppEvent::kEventType_StartSMPAdvertising;
     event.Handler = [](AppEvent *) { GetDFUOverSMP().StartBLEAdvertising(); };
     sAppTask.PostEvent(&event);
 }
 #endif

 void AppTask::FunctionHandler(AppEvent * aEvent)
 {
     if (aEvent->ButtonEvent.PinNo != FUNCTION_BUTTON)
         return;

     // To trigger software update: press the FUNCTION_BUTTON button briefly (< FACTORY_RESET_TRIGGER_TIMEOUT)
     // To initiate factory reset: press the FUNCTION_BUTTON for FACTORY_RESET_TRIGGER_TIMEOUT + FACTORY_RESET_CANCEL_WINDOW_TIMEOUT
     // All LEDs start blinking after FACTORY_RESET_TRIGGER_TIMEOUT to signal factory reset has been initiated.
     // To cancel factory reset: release the FUNCTION_BUTTON once all LEDs start blinking within the
     // FACTORY_RESET_CANCEL_WINDOW_TIMEOUT
     if (aEvent->ButtonEvent.Action == BUTTON_PUSH_EVENT)
     {
         if (!sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_NoneSelected)
         {
             sAppTask.StartTimer(FACTORY_RESET_TRIGGER_TIMEOUT);

             sAppTask.mFunction = kFunction_SoftwareUpdate;
         }
     }
     else
     {
         // If the button was released before factory reset got initiated, trigger a software update.
         if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_SoftwareUpdate)
         {
             sAppTask.CancelTimer();
             sAppTask.mFunction = kFunction_NoneSelected;

 #ifdef CONFIG_MCUMGR_SMP_BT
             GetDFUOverSMP().StartServer();
 #else
             LOG_INF("Software update is disabled");
 #endif
         }
         else if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_FactoryReset)
         {
             sUnusedLED.Set(false);
             sUnusedLED_1.Set(false);

             // Set lock status LED back to show state of lock.
             sLockLED.Set(!BoltLockMgr().IsUnlocked());

             UpdateStatusLED();
             sAppTask.CancelTimer();

             // Change the function to none selected since factory reset has been canceled.
             sAppTask.mFunction = kFunction_NoneSelected;

             LOG_INF("Factory Reset has been Canceled");
         }
     }
 }

 void AppTask::StartThreadHandler(AppEvent * aEvent)
 {
     if (aEvent->ButtonEvent.PinNo != THREAD_START_BUTTON)
         return;

     if (chip::Server::GetInstance().AddTestCommissioning() != CHIP_NO_ERROR)
     {
         LOG_ERR("Failed to add test pairing");
     }

     if (!ConnectivityMgr().IsThreadProvisioned())
     {
         StartDefaultThreadNetwork();
         LOG_INF("Device is not commissioned to a Thread network. Starting with the default configuration.");
     }
     else
     {
         LOG_INF("Device is commissioned to a Thread network.");
     }
 }

 void AppTask::StartBLEAdvertisementHandler(AppEvent *)
 {
     if (Server::GetInstance().GetFabricTable().FabricCount() != 0)
     {
         LOG_INF("Matter service BLE advertising not started - device is already commissioned");
         return;
     }

     if (ConnectivityMgr().IsBLEAdvertisingEnabled())
     {
         LOG_INF("BLE advertising is already enabled");
         return;
     }

     if (Server::GetInstance().GetCommissioningWindowManager().OpenBasicCommissioningWindow() != CHIP_NO_ERROR)
     {
         LOG_ERR("OpenBasicCommissioningWindow() failed");
     }
 }

 void AppTask::UpdateLedStateEventHandler(AppEvent * aEvent)
 {
     if (aEvent->Type == AppEvent::kEventType_UpdateLedState)
     {
         aEvent->UpdateLedStateEvent.LedWidget->UpdateState();
     }
 }

 void AppTask::LEDStateUpdateHandler(LEDWidget & ledWidget)
 {
     AppEvent event;
     event.Type                          = AppEvent::kEventType_UpdateLedState;
     event.Handler                       = UpdateLedStateEventHandler;
     event.UpdateLedStateEvent.LedWidget = &ledWidget;
     sAppTask.PostEvent(&event);
 }

 void AppTask::UpdateStatusLED()
 {
 #ifdef CONFIG_STATE_LEDS
     /* Update the status LED.
      *
      * If thread and service provisioned, keep the LED On constantly.
      *
      * If the system has ble connection(s) uptill the stage above, THEN blink the LED at an even
      * rate of 100ms.
      *
      * Otherwise, blink the LED On for a very short time. */
     if (sIsThreadProvisioned && sIsThreadEnabled)
     {
         sStatusLED.Set(true);
     }
     else if (sHaveBLEConnections)
     {
         sStatusLED.Blink(100, 100);
     }
     else
     {
         sStatusLED.Blink(50, 950);
     }
 #endif
 }

 void AppTask::ChipEventHandler(const ChipDeviceEvent * event, intptr_t /* arg */)
 {
     switch (event->Type)
     {
     case DeviceEventType::kCHIPoBLEAdvertisingChange:
 #ifdef CONFIG_CHIP_NFC_COMMISSIONING
         if (event->CHIPoBLEAdvertisingChange.Result == kActivity_Started)
         {
             if (NFCMgr().IsTagEmulationStarted())
             {
                 LOG_INF("NFC Tag emulation is already started");
             }
             else
             {
                 ShareQRCodeOverNFC(chip::RendezvousInformationFlags(chip::RendezvousInformationFlag::kBLE));
             }
         }
         else if (event->CHIPoBLEAdvertisingChange.Result == kActivity_Stopped)
         {
             NFCMgr().StopTagEmulation();
         }
 #endif
         sHaveBLEConnections = ConnectivityMgr().NumBLEConnections() != 0;
         UpdateStatusLED();
         break;
     case DeviceEventType::kThreadStateChange:
         sIsThreadProvisioned = ConnectivityMgr().IsThreadProvisioned();
         sIsThreadEnabled     = ConnectivityMgr().IsThreadEnabled();
         UpdateStatusLED();
         break;
     default:
         break;
     }
 }

 void AppTask::CancelTimer()
 {
     k_timer_stop(&sFunctionTimer);
     mFunctionTimerActive = false;
 }

 void AppTask::StartTimer(uint32_t aTimeoutInMs)
 {
     k_timer_start(&sFunctionTimer, K_MSEC(aTimeoutInMs), K_NO_WAIT);
     mFunctionTimerActive = true;
 }

 void AppTask::ActionInitiated(BoltLockManager::Action_t aAction, int32_t aActor)
 {
     // If the action has been initiated by the lock, update the bolt lock trait
     // and start flashing the LEDs rapidly to indicate action initiation.
     if (aAction == BoltLockManager::LOCK_ACTION)
     {
         LOG_INF("Lock Action has been initiated");
     }
     else if (aAction == BoltLockManager::UNLOCK_ACTION)
     {
         LOG_INF("Unlock Action has been initiated");
     }

     sLockLED.Blink(50, 50);
 }

 void AppTask::ActionCompleted(BoltLockManager::Action_t aAction, int32_t aActor)
 {
     // if the action has been completed by the lock, update the bolt lock trait.
     // Turn on the lock LED if in a LOCKED state OR
     // Turn off the lock LED if in an UNLOCKED state.
     if (aAction == BoltLockManager::LOCK_ACTION)
     {
         LOG_INF("Lock Action has been completed");
         sLockLED.Set(true);
     }
     else if (aAction == BoltLockManager::UNLOCK_ACTION)
     {
         LOG_INF("Unlock Action has been completed");
         sLockLED.Set(false);
     }

     if (aActor == AppEvent::kEventType_Button)
     {
         sAppTask.UpdateClusterState();
     }
 }

 void AppTask::PostLockActionRequest(int32_t aActor, BoltLockManager::Action_t aAction)
 {
     AppEvent event;
     event.Type             = AppEvent::kEventType_Lock;
     event.LockEvent.Actor  = aActor;
     event.LockEvent.Action = aAction;
     event.Handler          = LockActionEventHandler;
     PostEvent(&event);
 }

 void AppTask::PostEvent(AppEvent * aEvent)
 {
     if (k_msgq_put(&sAppEventQueue, aEvent, K_NO_WAIT))
     {
         LOG_INF("Failed to post event to app task event queue");
     }
 }

 void AppTask::DispatchEvent(AppEvent * aEvent)
 {
     if (aEvent->Handler)
     {
         aEvent->Handler(aEvent);
     }
     else
     {
         LOG_INF("Event received with no handler. Dropping event.");
     }
 }

 void AppTask::UpdateClusterState()
 {
     // write the new on/off value
     EmberAfStatus status = Clusters::OnOff::Attributes::OnOff::Set(kLockEndpointId, !BoltLockMgr().IsUnlocked());

     if (status != EMBER_ZCL_STATUS_SUCCESS)
     {
         LOG_ERR("Updating on/off %x", status);
     }
 }
	/*
	*
	* Copyright (c) 2020 Project CHIP Authors
	* All rights reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "AppTask.h"
	#include "AppConfig.h"
	#include "BoltLockManager.h"
	#include "LEDWidget.h"
	#include "ThreadUtil.h"

	#include <app-common/zap-generated/attribute-id.h>
	#include <app-common/zap-generated/attribute-type.h>
	#include <app-common/zap-generated/attributes/Accessors.h>
	#include <app-common/zap-generated/cluster-id.h>
	#include <app/server/OnboardingCodesUtil.h>
	#include <app/server/Server.h>
	#include <credentials/DeviceAttestationCredsProvider.h>
	#include <credentials/examples/DeviceAttestationCredsExample.h>
	#include <lib/support/CHIPMem.h>
	#include <lib/support/CodeUtils.h>
	#include <lib/support/ErrorStr.h>
	#include <system/SystemClock.h>

	#if CONFIG_CHIP_OTA_REQUESTOR
	#include "OTAUtil.h"
	#include <app/clusters/ota-requestor/BDXDownloader.h>
	#include <app/clusters/ota-requestor/DefaultOTARequestorStorage.h>
	#include <app/clusters/ota-requestor/GenericOTARequestorDriver.h>
	#include <app/clusters/ota-requestor/OTARequestor.h>
	#endif

	#include <dk_buttons_and_leds.h>
	#include <logging/log.h>
	#include <zephyr.h>

	using namespace ::chip;
	using namespace ::chip::app;
	using namespace ::chip::Credentials;
	using namespace ::chip::DeviceLayer;

	#define FACTORY_RESET_TRIGGER_TIMEOUT 3000
	#define FACTORY_RESET_CANCEL_WINDOW_TIMEOUT 3000
	#define APP_EVENT_QUEUE_SIZE 10
	#define BUTTON_PUSH_EVENT 1
	#define BUTTON_RELEASE_EVENT 0

	namespace {
	constexpr EndpointId kLockEndpointId = 1;

	LOG_MODULE_DECLARE(app);
	K_MSGQ_DEFINE(sAppEventQueue, sizeof(AppEvent), APP_EVENT_QUEUE_SIZE, alignof(AppEvent));
	k_timer sFunctionTimer;

	LEDWidget sStatusLED;
	LEDWidget sLockLED;
	LEDWidget sUnusedLED;
	LEDWidget sUnusedLED_1;

	bool sIsThreadProvisioned = false;
	bool sIsThreadEnabled = false;
	bool sHaveBLEConnections = false;

	#if CONFIG_CHIP_OTA_REQUESTOR
	DefaultOTARequestorStorage sRequestorStorage;
	GenericOTARequestorDriver sOTARequestorDriver;
	chip::BDXDownloader sBDXDownloader;
	chip::OTARequestor sOTARequestor;
	#endif

	} // namespace

	AppTask AppTask::sAppTask;

	CHIP_ERROR AppTask::Init()
	{
	// Initialize CHIP stack
	LOG_INF("Init CHIP stack");

	CHIP_ERROR err = chip::Platform::MemoryInit();
	if (err != CHIP_NO_ERROR)
	{
	LOG_ERR("Platform::MemoryInit() failed");
	return err;
	}

	err = PlatformMgr().InitChipStack();
	if (err != CHIP_NO_ERROR)
	{
	LOG_ERR("PlatformMgr().InitChipStack() failed");
	return err;
	}

	err = ThreadStackMgr().InitThreadStack();
	if (err != CHIP_NO_ERROR)
	{
	LOG_ERR("ThreadStackMgr().InitThreadStack() failed");
	return err;
	}

	#ifdef CONFIG_OPENTHREAD_MTD_SED
	err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_SleepyEndDevice);
	#elif CONFIG_OPENTHREAD_MTD
	err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_MinimalEndDevice);
	#else
	err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_FullEndDevice);
	#endif
	if (err != CHIP_NO_ERROR)
	{
	LOG_ERR("ConnectivityMgr().SetThreadDeviceType() failed");
	return err;
	}

	// Initialize LEDs
	LEDWidget::InitGpio();
	LEDWidget::SetStateUpdateCallback(LEDStateUpdateHandler);

	sStatusLED.Init(SYSTEM_STATE_LED);
	sLockLED.Init(LOCK_STATE_LED);
	sLockLED.Set(!BoltLockMgr().IsUnlocked());

	sUnusedLED.Init(DK_LED3);
	sUnusedLED_1.Init(DK_LED4);

	UpdateStatusLED();

	BoltLockMgr().Init();
	BoltLockMgr().SetCallbacks(ActionInitiated, ActionCompleted);

	// Initialize buttons
	int ret = dk_buttons_init(ButtonEventHandler);
	if (ret)
	{
	LOG_ERR("dk_buttons_init() failed");
	return chip::System::MapErrorZephyr(ret);
	}

	// Initialize function button timer
	k_timer_init(&sFunctionTimer, &AppTask::TimerEventHandler, nullptr);
	k_timer_user_data_set(&sFunctionTimer, this);

	#ifdef CONFIG_MCUMGR_SMP_BT
	// Initialize DFU over SMP
	GetDFUOverSMP().Init(RequestSMPAdvertisingStart);
	GetDFUOverSMP().ConfirmNewImage();
	#endif

	// Initialize CHIP server
	SetDeviceAttestationCredentialsProvider(Examples::GetExampleDACProvider());
	InitOTARequestor();
	ReturnErrorOnFailure(chip::Server::GetInstance().Init());
	ConfigurationMgr().LogDeviceConfig();
	PrintOnboardingCodes(chip::RendezvousInformationFlags(chip::RendezvousInformationFlag::kBLE));

	// Add CHIP event handler and start CHIP thread.
	// Note that all the initialization code should happen prior to this point to avoid data races
	// between the main and the CHIP threads.
	PlatformMgr().AddEventHandler(ChipEventHandler, 0);

	err = PlatformMgr().StartEventLoopTask();
	if (err != CHIP_NO_ERROR)
	{
	LOG_ERR("PlatformMgr().StartEventLoopTask() failed");
	}

	return err;
	}

	void AppTask::InitOTARequestor()
	{
	#if CONFIG_CHIP_OTA_REQUESTOR
	OTAImageProcessorNrf::Get().SetOTADownloader(&sBDXDownloader);
	sBDXDownloader.SetImageProcessorDelegate(&OTAImageProcessorNrf::Get());
	sOTARequestorDriver.Init(&sOTARequestor, &OTAImageProcessorNrf::Get());
	sRequestorStorage.Init(Server::GetInstance().GetPersistentStorage());
	sOTARequestor.Init(Server::GetInstance(), sRequestorStorage, sOTARequestorDriver, sBDXDownloader);
	chip::SetRequestorInstance(&sOTARequestor);
	#endif
	}

	CHIP_ERROR AppTask::StartApp()
	{
	ReturnErrorOnFailure(Init());

	AppEvent event = {};

	while (true)
	{
	k_msgq_get(&sAppEventQueue, &event, K_FOREVER);
	DispatchEvent(&event);
	}

	return CHIP_NO_ERROR;
	}

	void AppTask::LockActionEventHandler(AppEvent * aEvent)
	{
	BoltLockManager::Action_t action = BoltLockManager::INVALID_ACTION;
	int32_t actor = 0;

	if (aEvent->Type == AppEvent::kEventType_Lock)
	{
	action = static_cast<BoltLockManager::Action_t>(aEvent->LockEvent.Action);
	actor = aEvent->LockEvent.Actor;
	}
	else if (aEvent->Type == AppEvent::kEventType_Button)
	{
	action = BoltLockMgr().IsUnlocked() ? BoltLockManager::LOCK_ACTION : BoltLockManager::UNLOCK_ACTION;
	actor = AppEvent::kEventType_Button;
	}

	if (action != BoltLockManager::INVALID_ACTION && !BoltLockMgr().InitiateAction(actor, action))
	LOG_INF("Action is already in progress or active.");
	}

	void AppTask::ButtonEventHandler(uint32_t button_state, uint32_t has_changed)
	{
	AppEvent button_event;
	button_event.Type = AppEvent::kEventType_Button;

	if (LOCK_BUTTON_MASK & button_state & has_changed)
	{
	button_event.ButtonEvent.PinNo = LOCK_BUTTON;
	button_event.ButtonEvent.Action = BUTTON_PUSH_EVENT;
	button_event.Handler = LockActionEventHandler;
	sAppTask.PostEvent(&button_event);
	}

	if (FUNCTION_BUTTON_MASK & has_changed)
	{
	button_event.ButtonEvent.PinNo = FUNCTION_BUTTON;
	button_event.ButtonEvent.Action = (FUNCTION_BUTTON_MASK & button_state) ? BUTTON_PUSH_EVENT : BUTTON_RELEASE_EVENT;
	button_event.Handler = FunctionHandler;
	sAppTask.PostEvent(&button_event);
	}

	if (THREAD_START_BUTTON_MASK & button_state & has_changed)
	{
	button_event.ButtonEvent.PinNo = THREAD_START_BUTTON;
	button_event.ButtonEvent.Action = BUTTON_PUSH_EVENT;
	button_event.Handler = StartThreadHandler;
	sAppTask.PostEvent(&button_event);
	}

	if (BLE_ADVERTISEMENT_START_BUTTON_MASK & button_state & has_changed)
	{
	button_event.ButtonEvent.PinNo = BLE_ADVERTISEMENT_START_BUTTON;
	button_event.ButtonEvent.Action = BUTTON_PUSH_EVENT;
	button_event.Handler = StartBLEAdvertisementHandler;
	sAppTask.PostEvent(&button_event);
	}
	}

	void AppTask::TimerEventHandler(k_timer * timer)
	{
	AppEvent event;
	event.Type = AppEvent::kEventType_Timer;
	event.TimerEvent.Context = k_timer_user_data_get(timer);
	event.Handler = FunctionTimerEventHandler;
	sAppTask.PostEvent(&event);
	}

	void AppTask::FunctionTimerEventHandler(AppEvent * aEvent)
	{
	if (aEvent->Type != AppEvent::kEventType_Timer)
	return;

	// If we reached here, the button was held past FACTORY_RESET_TRIGGER_TIMEOUT, initiate factory reset
	if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_SoftwareUpdate)
	{
	LOG_INF("Factory Reset Triggered. Release button within %ums to cancel.", FACTORY_RESET_TRIGGER_TIMEOUT);

	// Start timer for FACTORY_RESET_CANCEL_WINDOW_TIMEOUT to allow user to cancel, if required.
	sAppTask.StartTimer(FACTORY_RESET_CANCEL_WINDOW_TIMEOUT);
	sAppTask.mFunction = kFunction_FactoryReset;

	#ifdef CONFIG_STATE_LEDS
	// Turn off all LEDs before starting blink to make sure blink is co-ordinated.
	sStatusLED.Set(false);
	sLockLED.Set(false);
	sUnusedLED_1.Set(false);
	sUnusedLED.Set(false);

	sStatusLED.Blink(500);
	sLockLED.Blink(500);
	sUnusedLED.Blink(500);
	sUnusedLED_1.Blink(500);
	#endif
	}
	else if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_FactoryReset)
	{
	// Actually trigger Factory Reset
	sAppTask.mFunction = kFunction_NoneSelected;

	chip::Server::GetInstance().ScheduleFactoryReset();
	}
	}

	#ifdef CONFIG_MCUMGR_SMP_BT
	void AppTask::RequestSMPAdvertisingStart(void)
	{
	AppEvent event;
	event.Type = AppEvent::kEventType_StartSMPAdvertising;
	event.Handler = [](AppEvent *) { GetDFUOverSMP().StartBLEAdvertising(); };
	sAppTask.PostEvent(&event);
	}
	#endif

	void AppTask::FunctionHandler(AppEvent * aEvent)
	{
	if (aEvent->ButtonEvent.PinNo != FUNCTION_BUTTON)
	return;

	// To trigger software update: press the FUNCTION_BUTTON button briefly (< FACTORY_RESET_TRIGGER_TIMEOUT)
	// To initiate factory reset: press the FUNCTION_BUTTON for FACTORY_RESET_TRIGGER_TIMEOUT + FACTORY_RESET_CANCEL_WINDOW_TIMEOUT
	// All LEDs start blinking after FACTORY_RESET_TRIGGER_TIMEOUT to signal factory reset has been initiated.
	// To cancel factory reset: release the FUNCTION_BUTTON once all LEDs start blinking within the
	// FACTORY_RESET_CANCEL_WINDOW_TIMEOUT
	if (aEvent->ButtonEvent.Action == BUTTON_PUSH_EVENT)
	{
	if (!sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_NoneSelected)
	{
	sAppTask.StartTimer(FACTORY_RESET_TRIGGER_TIMEOUT);

	sAppTask.mFunction = kFunction_SoftwareUpdate;
	}
	}
	else
	{
	// If the button was released before factory reset got initiated, trigger a software update.
	if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_SoftwareUpdate)
	{
	sAppTask.CancelTimer();
	sAppTask.mFunction = kFunction_NoneSelected;

	#ifdef CONFIG_MCUMGR_SMP_BT
	GetDFUOverSMP().StartServer();
	#else
	LOG_INF("Software update is disabled");
	#endif
	}
	else if (sAppTask.mFunctionTimerActive && sAppTask.mFunction == kFunction_FactoryReset)
	{
	sUnusedLED.Set(false);
	sUnusedLED_1.Set(false);

	// Set lock status LED back to show state of lock.
	sLockLED.Set(!BoltLockMgr().IsUnlocked());

	UpdateStatusLED();
	sAppTask.CancelTimer();

	// Change the function to none selected since factory reset has been canceled.
	sAppTask.mFunction = kFunction_NoneSelected;

	LOG_INF("Factory Reset has been Canceled");
	}
	}
	}

	void AppTask::StartThreadHandler(AppEvent * aEvent)
	{
	if (aEvent->ButtonEvent.PinNo != THREAD_START_BUTTON)
	return;

	if (chip::Server::GetInstance().AddTestCommissioning() != CHIP_NO_ERROR)
	{
	LOG_ERR("Failed to add test pairing");
	}

	if (!ConnectivityMgr().IsThreadProvisioned())
	{
	StartDefaultThreadNetwork();
	LOG_INF("Device is not commissioned to a Thread network. Starting with the default configuration.");
	}
	else
	{
	LOG_INF("Device is commissioned to a Thread network.");
	}
	}

	void AppTask::StartBLEAdvertisementHandler(AppEvent *)
	{
	if (Server::GetInstance().GetFabricTable().FabricCount() != 0)
	{
	LOG_INF("Matter service BLE advertising not started - device is already commissioned");
	return;
	}

	if (ConnectivityMgr().IsBLEAdvertisingEnabled())
	{
	LOG_INF("BLE advertising is already enabled");
	return;
	}

	if (Server::GetInstance().GetCommissioningWindowManager().OpenBasicCommissioningWindow() != CHIP_NO_ERROR)
	{
	LOG_ERR("OpenBasicCommissioningWindow() failed");
	}
	}

	void AppTask::UpdateLedStateEventHandler(AppEvent * aEvent)
	{
	if (aEvent->Type == AppEvent::kEventType_UpdateLedState)
	{
	aEvent->UpdateLedStateEvent.LedWidget->UpdateState();
	}
	}

	void AppTask::LEDStateUpdateHandler(LEDWidget & ledWidget)
	{
	AppEvent event;
	event.Type = AppEvent::kEventType_UpdateLedState;
	event.Handler = UpdateLedStateEventHandler;
	event.UpdateLedStateEvent.LedWidget = &ledWidget;
	sAppTask.PostEvent(&event);
	}

	void AppTask::UpdateStatusLED()
	{
	#ifdef CONFIG_STATE_LEDS
	/* Update the status LED.
	*
	* If thread and service provisioned, keep the LED On constantly.
	*
	* If the system has ble connection(s) uptill the stage above, THEN blink the LED at an even
	* rate of 100ms.
	*
	* Otherwise, blink the LED On for a very short time. */
	if (sIsThreadProvisioned && sIsThreadEnabled)
	{
	sStatusLED.Set(true);
	}
	else if (sHaveBLEConnections)
	{
	sStatusLED.Blink(100, 100);
	}
	else
	{
	sStatusLED.Blink(50, 950);
	}
	#endif
	}

	void AppTask::ChipEventHandler(const ChipDeviceEvent * event, intptr_t /* arg */)
	{
	switch (event->Type)
	{
	case DeviceEventType::kCHIPoBLEAdvertisingChange:
	#ifdef CONFIG_CHIP_NFC_COMMISSIONING
	if (event->CHIPoBLEAdvertisingChange.Result == kActivity_Started)
	{
	if (NFCMgr().IsTagEmulationStarted())
	{
	LOG_INF("NFC Tag emulation is already started");
	}
	else
	{
	ShareQRCodeOverNFC(chip::RendezvousInformationFlags(chip::RendezvousInformationFlag::kBLE));
	}
	}
	else if (event->CHIPoBLEAdvertisingChange.Result == kActivity_Stopped)
	{
	NFCMgr().StopTagEmulation();
	}
	#endif
	sHaveBLEConnections = ConnectivityMgr().NumBLEConnections() != 0;
	UpdateStatusLED();
	break;
	case DeviceEventType::kThreadStateChange:
	sIsThreadProvisioned = ConnectivityMgr().IsThreadProvisioned();
	sIsThreadEnabled = ConnectivityMgr().IsThreadEnabled();
	UpdateStatusLED();
	break;
	default:
	break;
	}
	}

	void AppTask::CancelTimer()
	{
	k_timer_stop(&sFunctionTimer);
	mFunctionTimerActive = false;
	}

	void AppTask::StartTimer(uint32_t aTimeoutInMs)
	{
	k_timer_start(&sFunctionTimer, K_MSEC(aTimeoutInMs), K_NO_WAIT);
	mFunctionTimerActive = true;
	}

	void AppTask::ActionInitiated(BoltLockManager::Action_t aAction, int32_t aActor)
	{
	// If the action has been initiated by the lock, update the bolt lock trait
	// and start flashing the LEDs rapidly to indicate action initiation.
	if (aAction == BoltLockManager::LOCK_ACTION)
	{
	LOG_INF("Lock Action has been initiated");
	}
	else if (aAction == BoltLockManager::UNLOCK_ACTION)
	{
	LOG_INF("Unlock Action has been initiated");
	}

	sLockLED.Blink(50, 50);
	}

	void AppTask::ActionCompleted(BoltLockManager::Action_t aAction, int32_t aActor)
	{
	// if the action has been completed by the lock, update the bolt lock trait.
	// Turn on the lock LED if in a LOCKED state OR
	// Turn off the lock LED if in an UNLOCKED state.
	if (aAction == BoltLockManager::LOCK_ACTION)
	{
	LOG_INF("Lock Action has been completed");
	sLockLED.Set(true);
	}
	else if (aAction == BoltLockManager::UNLOCK_ACTION)
	{
	LOG_INF("Unlock Action has been completed");
	sLockLED.Set(false);
	}

	if (aActor == AppEvent::kEventType_Button)
	{
	sAppTask.UpdateClusterState();
	}
	}

	void AppTask::PostLockActionRequest(int32_t aActor, BoltLockManager::Action_t aAction)
	{
	AppEvent event;
	event.Type = AppEvent::kEventType_Lock;
	event.LockEvent.Actor = aActor;
	event.LockEvent.Action = aAction;
	event.Handler = LockActionEventHandler;
	PostEvent(&event);
	}

	void AppTask::PostEvent(AppEvent * aEvent)
	{
	if (k_msgq_put(&sAppEventQueue, aEvent, K_NO_WAIT))
	{
	LOG_INF("Failed to post event to app task event queue");
	}
	}

	void AppTask::DispatchEvent(AppEvent * aEvent)
	{
	if (aEvent->Handler)
	{
	aEvent->Handler(aEvent);
	}
	else
	{
	LOG_INF("Event received with no handler. Dropping event.");
	}
	}

	void AppTask::UpdateClusterState()
	{
	// write the new on/off value
	EmberAfStatus status = Clusters::OnOff::Attributes::OnOff::Set(kLockEndpointId, !BoltLockMgr().IsUnlocked());

	if (status != EMBER_ZCL_STATUS_SUCCESS)
	{
	LOG_ERR("Updating on/off %x", status);
	}
	}