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Emmanuel Edwards
Created January 15, 2024

Smart Gas Safety

This project demonstrates the need to provide safety in homes against cooking gas leakage.

10
Smart Gas Safety

Things used in this project

Story

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Code

Gas sensor (Thingy53)

C/C++
/*
 * Copyright (c) 2021 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

#include "app_task.h"

#include "battery.h"
#include "buzzer.h"
#include "fabric_table_delegate.h"
#include "led_widget.h"
#include <platform/CHIPDeviceLayer.h>

#include <DeviceInfoProviderImpl.h>

#include <app-common/zap-generated/attributes/Accessors.h>
#include <app-common/zap-generated/cluster-objects.h>
#include <app/clusters/ota-requestor/OTATestEventTriggerDelegate.h>
#include <app/server/OnboardingCodesUtil.h>
#include <app/server/Server.h>
#include <app/util/attribute-storage.h>
#include <credentials/DeviceAttestationCredsProvider.h>
#include <credentials/examples/DeviceAttestationCredsExample.h>

#ifdef CONFIG_CHIP_WIFI
#include <app/clusters/network-commissioning/network-commissioning.h>
#include <platform/nrfconnect/wifi/NrfWiFiDriver.h>
#endif

#ifdef CONFIG_CHIP_OTA_REQUESTOR
#include "ota_util.h"
#endif

#ifdef CONFIG_CHIP_ICD_SUBSCRIPTION_HANDLING
#include <app/InteractionModelEngine.h>
#endif

#include <dk_buttons_and_leds.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/logging/log.h>

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

LOG_MODULE_DECLARE(app);

namespace
{
enum class FunctionTimerMode { kDisabled, kFactoryResetTrigger, kFactoryResetComplete };
enum class LedState { kAlive, kAdvertisingBle, kConnectedBle, kProvisioned };

#if CONFIG_AVERAGE_CURRENT_CONSUMPTION <= 0
#error Invalid CONFIG_AVERAGE_CURRENT_CONSUMPTION value set
#endif

constexpr size_t kAppEventQueueSize = 10;
constexpr size_t kFactoryResetTriggerTimeoutMs = 3000;
constexpr size_t kFactoryResetCompleteTimeoutMs = 3000;
constexpr size_t kMeasurementsIntervalMs = 3000;
constexpr uint8_t kTemperatureMeasurementEndpointId = 1;
constexpr int16_t kTemperatureMeasurementAttributeMaxValue = 0x7fff;
constexpr int16_t kTemperatureMeasurementAttributeMinValue = 0x954d;
constexpr int16_t kTemperatureMeasurementAttributeInvalidValue = 0x8000;
constexpr uint8_t kHumidityMeasurementEndpointId = 2;
constexpr uint16_t kHumidityMeasurementAttributeMaxValue = 0x2710;
constexpr uint16_t kHumidityMeasurementAttributeMinValue = 0;
constexpr uint16_t kHumidityMeasurementAttributeInvalidValue = 0xffff;
constexpr uint8_t kPressureMeasurementEndpointId = 3;
constexpr int16_t kPressureMeasurementAttributeMaxValue = 0x7fff;
constexpr int16_t kPressureMeasurementAttributeMinValue = 0x8001;
constexpr int16_t kPressureMeasurementAttributeInvalidValue = 0x8000;
constexpr uint8_t kPowerSourceEndpointId = 0;
constexpr int16_t kMinimalOperatingVoltageMv = 3200;
constexpr int16_t kMaximalOperatingVoltageMv = 4050;
constexpr int16_t kWarningThresholdVoltageMv = 3450;
constexpr int16_t kCriticalThresholdVoltageMv = 3250;
constexpr uint8_t kMinBatteryPercentage = 0;
/* Value is expressed in half percent units ranging from 0 to 200. */
constexpr uint8_t kMaxBatteryPercentage = 200;
/* Battery capacity in uAh */
constexpr uint32_t kBatteryCapacityUaH = 1350000;
/* Average device current consumption in uA */
constexpr uint32_t kDeviceAverageCurrentConsumptionUa = CONFIG_AVERAGE_CURRENT_CONSUMPTION;
/* Fully charged battery operation time in seconds */
constexpr uint32_t kFullBatteryOperationTime = kBatteryCapacityUaH / kDeviceAverageCurrentConsumptionUa * 3600;
/* It is recommended to toggle the signalled state with 0.5 s interval. */
constexpr size_t kIdentifyTimerIntervalMs = 500;

K_MSGQ_DEFINE(sAppEventQueue, sizeof(AppEvent), kAppEventQueueSize, alignof(AppEvent));
k_timer sFunctionTimer;
k_timer sMeasurementsTimer;
k_timer sIdentifyTimer;
FunctionTimerMode sFunctionTimerMode = FunctionTimerMode::kDisabled;

LEDWidget sRedLED;
LEDWidget sGreenLED;
LEDWidget sBlueLED;

bool sIsNetworkProvisioned;
bool sIsNetworkEnabled;
bool sIsBleAdvertisingEnabled;
bool sHaveBLEConnections;

#define LPG_DETECT DT_ALIAS(lpgdetectinput)

/* NOTE! This key is for test/certification only and should not be available in production devices!
 * If CONFIG_CHIP_FACTORY_DATA is enabled, this value is read from the factory data.
 */
uint8_t sTestEventTriggerEnableKey[TestEventTriggerDelegate::kEnableKeyLength] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55,
										   0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb,
										   0xcc, 0xdd, 0xee, 0xff };
chip::DeviceLayer::DeviceInfoProviderImpl gExampleDeviceInfoProvider;
LedState sLedState = LedState::kAlive;

/* Add identify for all endpoints */
Identify sIdentifyTemperature = { chip::EndpointId{ kTemperatureMeasurementEndpointId }, AppTask::OnIdentifyStart,
				  AppTask::OnIdentifyStop, EMBER_ZCL_IDENTIFY_IDENTIFY_TYPE_AUDIBLE_BEEP };
Identify sIdentifyHumidity = { chip::EndpointId{ kHumidityMeasurementEndpointId }, AppTask::OnIdentifyStart,
			       AppTask::OnIdentifyStop, EMBER_ZCL_IDENTIFY_IDENTIFY_TYPE_AUDIBLE_BEEP };
Identify sIdentifyPressure = { chip::EndpointId{ kPressureMeasurementEndpointId }, AppTask::OnIdentifyStart,
			       AppTask::OnIdentifyStop, EMBER_ZCL_IDENTIFY_IDENTIFY_TYPE_AUDIBLE_BEEP };

const device *sBme688SensorDev = DEVICE_DT_GET_ONE(bosch_bme680);

// gpio device from app.overlay
static const struct gpio_dt_spec lpg_detected = GPIO_DT_SPEC_GET(LPG_DETECT, gpios);
} /* namespace */

AppTask AppTask::sAppTask;

#ifdef CONFIG_CHIP_WIFI
app::Clusters::NetworkCommissioning::Instance
	sWiFiCommissioningInstance(0, &(NetworkCommissioning::NrfWiFiDriver::Instance()));
#endif

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;
	}

#if defined(CONFIG_NET_L2_OPENTHREAD)
	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);
#else
	err = ConnectivityMgr().SetThreadDeviceType(ConnectivityManager::kThreadDeviceType_MinimalEndDevice);
#endif
	if (err != CHIP_NO_ERROR) {
		LOG_ERR("ConnectivityMgr().SetThreadDeviceType() failed");
		return err;
	}

#elif defined(CONFIG_CHIP_WIFI)
	sWiFiCommissioningInstance.Init();
#else
	return CHIP_ERROR_INTERNAL;
#endif /* CONFIG_NET_L2_OPENTHREAD */

	/* Initialize RGB LED */
	LEDWidget::InitGpio();
	LEDWidget::SetStateUpdateCallback(LEDStateUpdateHandler);

	sRedLED.Init(DK_LED1);
	sGreenLED.Init(DK_LED2);
	sBlueLED.Init(DK_LED3);

	UpdateStatusLED();

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

	if (!device_is_ready(sBme688SensorDev)) {
		LOG_ERR("BME688 sensor device not ready");
		return chip::System::MapErrorZephyr(-ENODEV);
	}

	ret = BatteryMeasurementInit();
	if (ret) {
		LOG_ERR("Battery measurement init failed");
		return chip::System::MapErrorZephyr(ret);
	}

	ret = BatteryMeasurementEnable();
	if (ret) {
		LOG_ERR("Enabling battery measurement failed");
		return chip::System::MapErrorZephyr(ret);
	}

	ret = BatteryChargeControlInit();
	if (ret) {
		LOG_ERR("Battery charge control init failed");
		return chip::System::MapErrorZephyr(ret);
	}

	ret = BuzzerInit();
	if (ret) {
		LOG_ERR("Buzzer init failed");
		return chip::System::MapErrorZephyr(ret);
	}

	ret = gpio_pin_configure_dt(&lpg_detected, GPIO_INPUT);
	if (ret < 0) {
		return chip::System::MapErrorZephyr(ret);
	}

#ifdef CONFIG_CHIP_OTA_REQUESTOR
	/* OTA image confirmation must be done before the factory data init. */
	OtaConfirmNewImage();
#endif

#ifdef CONFIG_MCUMGR_TRANSPORT_BT
	/* Initialize DFU over SMP */
	GetDFUOverSMP().Init();
	GetDFUOverSMP().ConfirmNewImage();
	GetDFUOverSMP().StartServer();
#endif

/* Get factory data */
#ifdef CONFIG_CHIP_FACTORY_DATA
	ReturnErrorOnFailure(mFactoryDataProvider.Init());
	SetDeviceInstanceInfoProvider(&mFactoryDataProvider);
	SetDeviceAttestationCredentialsProvider(&mFactoryDataProvider);
	SetCommissionableDataProvider(&mFactoryDataProvider);
	/* Read EnableKey from the factory data. */
	MutableByteSpan enableKey(sTestEventTriggerEnableKey);
	err = mFactoryDataProvider.GetEnableKey(enableKey);
	if (err != CHIP_NO_ERROR) {
		LOG_ERR("mFactoryDataProvider.GetEnableKey() failed. Could not delegate a test event trigger");
		memset(sTestEventTriggerEnableKey, 0, sizeof(sTestEventTriggerEnableKey));
	}
#else
	SetDeviceInstanceInfoProvider(&DeviceInstanceInfoProviderMgrImpl());
	SetDeviceAttestationCredentialsProvider(Examples::GetExampleDACProvider());
#endif

	/* Initialize timers */
	k_timer_init(
		&sFunctionTimer, [](k_timer *) { sAppTask.PostEvent(AppEvent{ AppEvent::FunctionTimer }); }, nullptr);
	k_timer_init(
		&sMeasurementsTimer, [](k_timer *) { sAppTask.PostEvent(AppEvent{ AppEvent::MeasurementsTimer }); },
		nullptr);
	k_timer_start(&sMeasurementsTimer, K_MSEC(kMeasurementsIntervalMs), K_MSEC(kMeasurementsIntervalMs));
	k_timer_init(
		&sIdentifyTimer, [](k_timer *) { sAppTask.PostEvent(AppEvent{ AppEvent::IdentifyTimer }); }, nullptr);

	/* Initialize CHIP server */
	static chip::CommonCaseDeviceServerInitParams initParams;
	static OTATestEventTriggerDelegate testEventTriggerDelegate{ ByteSpan(sTestEventTriggerEnableKey) };
	(void)initParams.InitializeStaticResourcesBeforeServerInit();

	initParams.testEventTriggerDelegate = &testEventTriggerDelegate;
	ReturnErrorOnFailure(chip::Server::GetInstance().Init(initParams));

	gExampleDeviceInfoProvider.SetStorageDelegate(&Server::GetInstance().GetPersistentStorage());
	chip::DeviceLayer::SetDeviceInfoProvider(&gExampleDeviceInfoProvider);
	AppFabricTableDelegate::Init();

	ConfigurationMgr().LogDeviceConfig();
	PrintOnboardingCodes(chip::RendezvousInformationFlags(chip::RendezvousInformationFlag::kBLE));

#ifdef CONFIG_CHIP_ICD_SUBSCRIPTION_HANDLING
	chip::app::InteractionModelEngine::GetInstance()->RegisterReadHandlerAppCallback(&GetICDUtil());
#endif

	/*
	 * 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;
	}

	return CHIP_NO_ERROR;
}

void AppTask::OpenPairingWindow()
{
	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 (chip::Server::GetInstance().GetCommissioningWindowManager().OpenBasicCommissioningWindow() !=
	    CHIP_NO_ERROR) {
		LOG_ERR("OpenBasicCommissioningWindow() failed");
	}
}

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::PostEvent(const AppEvent &event)
{
	if (k_msgq_put(&sAppEventQueue, &event, K_NO_WAIT)) {
		LOG_ERR("Failed to post event to app task event queue");
	}
}

void AppTask::DispatchEvent(AppEvent &event)
{
	switch (event.Type) {
	case AppEvent::FunctionPress:
		ButtonPushHandler();
		break;
	case AppEvent::FunctionRelease:
		ButtonReleaseHandler();
		break;
	case AppEvent::FunctionTimer:
		FunctionTimerHandler();
		break;
	case AppEvent::MeasurementsTimer:
		MeasurementsTimerHandler();
		break;
	case AppEvent::IdentifyTimer:
		IdentifyTimerHandler();
		break;
	case AppEvent::UpdateLedState:
		event.UpdateLedStateEvent.LedWidget->UpdateState();
		break;
	default:
		LOG_INF("Unknown event received");
		break;
	}
}

void AppTask::ButtonPushHandler()
{
	sFunctionTimerMode = FunctionTimerMode::kFactoryResetTrigger;
	k_timer_start(&sFunctionTimer, K_MSEC(kFactoryResetTriggerTimeoutMs), K_NO_WAIT);
}

void AppTask::ButtonReleaseHandler()
{
	/* If the button was released within the first kFactoryResetTriggerTimeoutMs, open the BLE pairing
	 * window. */
	if (sFunctionTimerMode == FunctionTimerMode::kFactoryResetTrigger) {
		GetAppTask().OpenPairingWindow();
	}

	sFunctionTimerMode = FunctionTimerMode::kDisabled;
	k_timer_stop(&sFunctionTimer);
}

void AppTask::ButtonStateHandler(uint32_t buttonState, uint32_t hasChanged)
{
	if (hasChanged & DK_BTN1_MSK) {
		if (buttonState & DK_BTN1_MSK)
			sAppTask.PostEvent(AppEvent{ AppEvent::FunctionPress });
		else
			sAppTask.PostEvent(AppEvent{ AppEvent::FunctionRelease });
	}
}

void AppTask::FunctionTimerHandler()
{
	switch (sFunctionTimerMode) {
	case FunctionTimerMode::kFactoryResetTrigger:
		LOG_INF("Factory Reset triggered. Release button within %ums to cancel.",
			kFactoryResetCompleteTimeoutMs);
		sFunctionTimerMode = FunctionTimerMode::kFactoryResetComplete;
		k_timer_start(&sFunctionTimer, K_MSEC(kFactoryResetCompleteTimeoutMs), K_NO_WAIT);
		break;
	case FunctionTimerMode::kFactoryResetComplete:
		ConfigurationMgr().InitiateFactoryReset();
		break;
	default:
		break;
	}
}

void AppTask::MeasurementsTimerHandler()
{
	sAppTask.UpdateClustersState();
}

void AppTask::OnIdentifyStart(Identify *)
{
	k_timer_start(&sIdentifyTimer, K_MSEC(kIdentifyTimerIntervalMs), K_MSEC(kIdentifyTimerIntervalMs));
}

void AppTask::OnIdentifyStop(Identify *)
{
	k_timer_stop(&sIdentifyTimer);
	BuzzerSetState(false);
}

void AppTask::IdentifyTimerHandler()
{
	BuzzerToggleState();
}

void AppTask::UpdateTemperatureClusterState()
{
	struct sensor_value sTemperature;
	EmberAfStatus status;
	int result = sensor_channel_get(sBme688SensorDev, SENSOR_CHAN_AMBIENT_TEMP, &sTemperature);
	if (result == 0) {
		/* Defined by cluster temperature measured value = 100 x temperature in degC with resolution of
		 * 0.01 degC. val1 is an integer part of the value and val2 is fractional part in one-millionth
		 * parts. To achieve resolution of 0.01 degC val2 needs to be divided by 10000. */
		int16_t newValue = static_cast<int16_t>(sTemperature.val1 * 100 + sTemperature.val2 / 10000);

		if (newValue > kTemperatureMeasurementAttributeMaxValue ||
		    newValue < kTemperatureMeasurementAttributeMinValue) {
			/* Read value exceeds permitted limits, so assign invalid value code to it. */
			newValue = kTemperatureMeasurementAttributeInvalidValue;
		}

		const int leakStatus = gpio_pin_get_dt(&lpg_detected);
		if(leakStatus != 0){
			BuzzerSetState(true);
			newValue = 100;
		}else{
			BuzzerSetState(false);
			newValue = 200;
		}

		status = Clusters::TemperatureMeasurement::Attributes::MeasuredValue::Set(
			kTemperatureMeasurementEndpointId, newValue);
		if (status != EMBER_ZCL_STATUS_SUCCESS) {
			LOG_ERR("Updating temperature measurement %x", status);
		}
	} else {
		LOG_ERR("Getting temperature measurement data from BME688 failed with: %d", result);
	}
}

void AppTask::UpdatePressureClusterState()
{
	struct sensor_value sPressure;
	EmberAfStatus status;
	int result = sensor_channel_get(sBme688SensorDev, SENSOR_CHAN_PRESS, &sPressure);
	if (result == 0) {
		/* Defined by cluster pressure measured value = 10 x pressure in kPa with resolution of 0.1 kPa.
		 * val1 is an integer part of the value and val2 is fractional part in one-millionth parts.
		 * To achieve resolution of 0.1 kPa val2 needs to be divided by 100000. */
		int16_t newValue = static_cast<int16_t>(sPressure.val1 * 10 + sPressure.val2 / 100000);

		if (newValue > kPressureMeasurementAttributeMaxValue ||
		    newValue < kPressureMeasurementAttributeMinValue) {
			/* Read value exceeds permitted limits, so assign invalid value code to it. */
			newValue = kPressureMeasurementAttributeInvalidValue;
		}

		status = Clusters::PressureMeasurement::Attributes::MeasuredValue::Set(kPressureMeasurementEndpointId,
										       newValue);
		if (status != EMBER_ZCL_STATUS_SUCCESS) {
			LOG_ERR("Updating pressure measurement %x", status);
		}
	} else {
		LOG_ERR("Getting pressure measurement data from BME688 failed with: %d", result);
	}
}

void AppTask::UpdateRelativeHumidityClusterState()
{
	struct sensor_value sHumidity;
	EmberAfStatus status;
	int result = sensor_channel_get(sBme688SensorDev, SENSOR_CHAN_HUMIDITY, &sHumidity);
	if (result == 0) {
		/* Defined by cluster humidity measured value = 100 x humidity in %RH with resolution of 0.01 %.
		 * val1 is an integer part of the value and val2 is fractional part in one-millionth parts.
		 * To achieve resolution of 0.01 % val2 needs to be divided by 10000. */
		uint16_t newValue = static_cast<int16_t>(sHumidity.val1 * 100 + sHumidity.val2 / 10000);

		if (newValue > kHumidityMeasurementAttributeMaxValue ||
		    newValue < kHumidityMeasurementAttributeMinValue) {
			/* Read value exceeds permitted limits, so assign invalid value code to it. */
			newValue = kHumidityMeasurementAttributeInvalidValue;
		}

		status = Clusters::RelativeHumidityMeasurement::Attributes::MeasuredValue::Set(
			kHumidityMeasurementEndpointId, newValue);
		if (status != EMBER_ZCL_STATUS_SUCCESS) {
			LOG_ERR("Updating relative humidity measurement %x", status);
		}
	} else {
		LOG_ERR("Getting humidity measurement data from BME688 failed with: %d", result);
	}
}

void AppTask::UpdatePowerSourceClusterState()
{
	EmberAfStatus status;
	int32_t voltage = BatteryMeasurementReadVoltageMv();
	/* Value is expressed in half percent units ranging from 0 to 200. */
	uint8_t batteryPercentage;
	uint32_t batteryTimeRemaining;
	Clusters::PowerSource::PowerSourceStatusEnum batteryStatus;
	Clusters::PowerSource::BatChargeLevelEnum batteryChargeLevel;
	bool batteryPresent;
	Clusters::PowerSource::BatChargeStateEnum batteryCharged;

	if (voltage < 0) {
		voltage = 0;
		batteryPercentage = 0;
		batteryStatus = Clusters::PowerSource::PowerSourceStatusEnum::kUnavailable;
		batteryPresent = false;

		LOG_ERR("Battery level measurement failed %d", voltage);
	} else {
		batteryStatus = Clusters::PowerSource::PowerSourceStatusEnum::kActive;
		batteryPresent = true;
	}

	if (voltage <= kMinimalOperatingVoltageMv) {
		batteryPercentage = kMinBatteryPercentage;
	} else if (voltage >= kMaximalOperatingVoltageMv) {
		batteryPercentage = kMaxBatteryPercentage;
	} else {
		batteryPercentage = kMaxBatteryPercentage * (voltage - kMinimalOperatingVoltageMv) /
				    (kMaximalOperatingVoltageMv - kMinimalOperatingVoltageMv);
	}

	batteryTimeRemaining = kFullBatteryOperationTime * batteryPercentage / kMaxBatteryPercentage;

	if (voltage < kCriticalThresholdVoltageMv) {
		batteryChargeLevel = Clusters::PowerSource::BatChargeLevelEnum::kCritical;
	} else if (voltage < kWarningThresholdVoltageMv) {
		batteryChargeLevel = Clusters::PowerSource::BatChargeLevelEnum::kWarning;
	} else {
		batteryChargeLevel = Clusters::PowerSource::BatChargeLevelEnum::kOk;
	}

	if (BatteryCharged()) {
		batteryCharged = Clusters::PowerSource::BatChargeStateEnum::kIsCharging;
	} else {
		batteryCharged = Clusters::PowerSource::BatChargeStateEnum::kIsNotCharging;
	}

	status = Clusters::PowerSource::Attributes::BatVoltage::Set(kPowerSourceEndpointId, voltage);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery voltage failed %x", status);
	}

	status = Clusters::PowerSource::Attributes::BatPercentRemaining::Set(kPowerSourceEndpointId, batteryPercentage);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery percentage failed %x", status);
	}

	status = Clusters::PowerSource::Attributes::BatTimeRemaining::Set(kPowerSourceEndpointId, batteryTimeRemaining);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery time remaining failed %x", status);
	}

	status = Clusters::PowerSource::Attributes::BatChargeLevel::Set(kPowerSourceEndpointId, batteryChargeLevel);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery charge level failed %x", status);
	}

	status = Clusters::PowerSource::Attributes::Status::Set(kPowerSourceEndpointId, batteryStatus);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery status failed %x", status);
	}

	status = Clusters::PowerSource::Attributes::BatPresent::Set(kPowerSourceEndpointId, batteryPresent);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery present failed %x", status);
	}

	status = Clusters::PowerSource::Attributes::BatChargeState::Set(kPowerSourceEndpointId, batteryCharged);
	if (status != EMBER_ZCL_STATUS_SUCCESS) {
		LOG_ERR("Updating battery charge failed %x", status);
	}
}

void AppTask::UpdateClustersState()
{
	const int result = sensor_sample_fetch(sBme688SensorDev);

	if (result == 0) {
		UpdateTemperatureClusterState();
		UpdatePressureClusterState();
		UpdateRelativeHumidityClusterState();
	} else {
		LOG_ERR("Fetching data from BME688 sensor failed with: %d", result);
	}

	UpdatePowerSourceClusterState();
}

void AppTask::UpdateStatusLED()
{
	LedState nextState;

	if (sIsNetworkProvisioned && sIsNetworkEnabled) {
		nextState = LedState::kProvisioned;
	} else if (sHaveBLEConnections) {
		nextState = LedState::kConnectedBle;
	} else if (sIsBleAdvertisingEnabled) {
		nextState = LedState::kAdvertisingBle;
	} else {
		nextState = LedState::kAlive;
	}

	/* In case of changing signalled state, turn off all leds to synchronize blinking */
	if (nextState != sLedState) {
		sGreenLED.Set(false);
		sBlueLED.Set(false);
		sRedLED.Set(false);
	}
	sLedState = nextState;

	switch (sLedState) {
	case LedState::kAlive:
		sGreenLED.Blink(50, 950);
		break;
	case LedState::kAdvertisingBle:
		sBlueLED.Blink(50, 950);
		break;
	case LedState::kConnectedBle:
		sBlueLED.Blink(100, 100);
		break;
	case LedState::kProvisioned:
		sBlueLED.Blink(50, 950);
		sRedLED.Blink(50, 950);
		break;
	default:
		break;
	}
}

void AppTask::LEDStateUpdateHandler(LEDWidget &ledWidget)
{
	sAppTask.PostEvent(AppEvent{ AppEvent::UpdateLedState, &ledWidget });
}

void AppTask::ChipEventHandler(const ChipDeviceEvent *event, intptr_t /* arg */)
{
	switch (event->Type) {
	case DeviceEventType::kCHIPoBLEAdvertisingChange:
		UpdateStatusLED();
#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;
#if defined(CONFIG_NET_L2_OPENTHREAD)
	case DeviceEventType::kDnssdInitialized:
#if CONFIG_CHIP_OTA_REQUESTOR
		InitBasicOTARequestor();
#endif /* CONFIG_CHIP_OTA_REQUESTOR */
		break;
	case DeviceEventType::kThreadStateChange:
		sIsNetworkProvisioned = ConnectivityMgr().IsThreadProvisioned();
		sIsNetworkEnabled = ConnectivityMgr().IsThreadEnabled();
#elif defined(CONFIG_CHIP_WIFI)
	case DeviceEventType::kWiFiConnectivityChange:
		sIsNetworkProvisioned = ConnectivityMgr().IsWiFiStationProvisioned();
		sIsNetworkEnabled = ConnectivityMgr().IsWiFiStationEnabled();
#if CONFIG_CHIP_OTA_REQUESTOR
		if (event->WiFiConnectivityChange.Result == kConnectivity_Established) {
			InitBasicOTARequestor();
		}
#endif /* CONFIG_CHIP_OTA_REQUESTOR */
#endif
		UpdateStatusLED();
		break;
	default:
		break;
	}
}

Credits

Emmanuel Edwards
4 projects • 10 followers
A Java based application developer. I do more of android application development and embedded system designs with C/C++,

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