/* mbed Microcontroller Library * Copyright (c) 2006-2020 ARM Limited * * SPDX-License-Identifier: Apache-2.0 * * 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. */ #ifndef __BLE_ENVIRONMENTAL_SERVICE_H__ #define __BLE_ENVIRONMENTAL_SERVICE_H__ #include "ble/BLE.h" #include "ble/Gap.h" #include "ble/GattServer.h" #if BLE_FEATURE_GATT_SERVER /** * @class EnvironmentalService * @brief BLE Environmental Service. This service provides temperature, humidity and pressure measurement. * Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.environmental_sensing.xml * Temperature: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature.xml * Humidity: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.humidity.xml * Pressure: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.pressure.xml */ class EnvironmentalService { public: typedef int16_t TemperatureType_t; typedef uint16_t HumidityType_t; typedef uint32_t PressureType_t; /** * @brief EnvironmentalService constructor. * @param _ble Reference to BLE device. */ EnvironmentalService(BLE& _ble) : ble(_ble), temperatureCharacteristic(GattCharacteristic::UUID_TEMPERATURE_CHAR, &temperature), humidityCharacteristic(GattCharacteristic::UUID_HUMIDITY_CHAR, &humidity), pressureCharacteristic(GattCharacteristic::UUID_PRESSURE_CHAR, &pressure) { static bool serviceAdded = false; /* We should only ever need to add the information service once. */ if (serviceAdded) { return; } GattCharacteristic *charTable[] = { &humidityCharacteristic, &pressureCharacteristic, &temperatureCharacteristic }; GattService environmentalService(GattService::UUID_ENVIRONMENTAL_SERVICE, charTable, sizeof(charTable) / sizeof(charTable[0])); ble.gattServer().addService(environmentalService); serviceAdded = true; } /** * @brief Update humidity characteristic. * @param newHumidityVal New humidity measurement. */ void updateHumidity(HumidityType_t newHumidityVal) { humidity = (HumidityType_t) (newHumidityVal * 100); ble.gattServer().write(humidityCharacteristic.getValueHandle(), (uint8_t *) &humidity, sizeof(HumidityType_t)); } /** * @brief Update pressure characteristic. * @param newPressureVal New pressure measurement. */ void updatePressure(PressureType_t newPressureVal) { pressure = (PressureType_t) (newPressureVal * 10); ble.gattServer().write(pressureCharacteristic.getValueHandle(), (uint8_t *) &pressure, sizeof(PressureType_t)); } /** * @brief Update temperature characteristic. * @param newTemperatureVal New temperature measurement. */ void updateTemperature(float newTemperatureVal) { temperature = (TemperatureType_t) (newTemperatureVal * 100); ble.gattServer().write(temperatureCharacteristic.getValueHandle(), (uint8_t *) &temperature, sizeof(TemperatureType_t)); } private: BLE& ble; TemperatureType_t temperature{}; HumidityType_t humidity{}; PressureType_t pressure{}; ReadOnlyGattCharacteristic<TemperatureType_t> temperatureCharacteristic; ReadOnlyGattCharacteristic<HumidityType_t> humidityCharacteristic; ReadOnlyGattCharacteristic<PressureType_t> pressureCharacteristic; }; #endif // BLE_FEATURE_GATT_SERVER #endif /* #ifndef __BLE_ENVIRONMENTAL_SERVICE_H__*/