Diff: ble/services/EnvironmentalService.h

Revision:

863:4f8e12333453

Child:

864:2bcdb60b537e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ble/services/EnvironmentalService.h	Mon Nov 02 09:09:07 2015 +0000
@@ -0,0 +1,117 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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"
+
+ /**
+* @class EnvironmentalService
+* @brief BLE Environmental Service. This service provides the location of the thermometer and the temperature.  <br>
+* Service:  https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.environmental_sensing.xml <br>
+* Temperature: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature.xml <br>
+* Humidity: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.humidity.xml <br>
+* Pressure: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.pressure.xml
+*/
+class EnvironmentalService {
+public:
+    /**
+     * @brief   EnvironmentalService constructor.
+     * @param   ble Reference to BLE device.
+     * @param   temperature_en Enable this characteristic.
+     * @param   humidity_en Enable this characteristic.
+     * @param   pressure_en Enable this characteristic.
+     */
+    EnvironmentalService(BLE &_ble,
+                         bool temperature_en = false,
+                         bool humidity_en = false,
+                         bool pressure_en = false) :
+        ble(_ble),
+        temperatureCharacteristic(GattCharacteristic::UUID_TEMPERATURE_CHAR,
+                              (uint8_t *) &temperature,
+                              (temperature_en) ? 2 : 0, // minLength
+                              (temperature_en) ? 2 : 0, // maxLength
+                              GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ),
+        humidityCharacteristic(GattCharacteristic::UUID_HUMIDITY_CHAR,
+                              (uint8_t *) &humidity,
+                              (humidity_en) ? 2 : 0, // minLength
+                              (humidity_en) ? 2 : 0, // maxLength
+                              GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ),
+        pressureCharacteristic(GattCharacteristic::UUID_PRESSURE_CHAR,
+                              (uint8_t *) &pressure,
+                              (pressure_en) ? 4 : 0, // minLength
+                              (pressure_en) ? 4 : 0, // maxLength
+                              GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ)
+        {
+        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(GattCharacteristic *));
+        
+        ble.gattServer().addService(environmentalService);
+        serviceAdded = true;
+    }
+
+    /**
+     * @brief   Update humidity characteristic.
+     * @param   newHumidityVal New humidity measurement.
+     */
+    void updateHumidity(uint16_t newHumidityVal)
+    {
+        humidity = (uint32_t) (newHumidityVal*100);                
+        ble.gattServer().write(humidityCharacteristic.getValueHandle(), (uint8_t *) &humidity, 2);
+    }
+
+    /**
+     * @brief   Update pressure characteristic.
+     * @param   newPressureVal New pressure measurement.
+     */
+    void updatePressure(uint32_t newPressureVal)
+    {
+        pressure = (uint32_t) (newPressureVal*10);        
+        ble.gattServer().write(pressureCharacteristic.getValueHandle(), (uint8_t *) &pressure, 4);
+    }
+
+    /**
+     * @brief   Update temperature characteristic.
+     * @param   newTemperatureVal New temperature measurement.
+     */
+    void updateTemperature(float newTemperatureVal)
+    {
+        temperature = (int16_t) (newTemperatureVal*100);
+        ble.gattServer().write(temperatureCharacteristic.getValueHandle(), (uint8_t *) &temperature, 2);
+    }
+
+private:
+    BLE &ble;
+
+    int16_t temperature;
+    GattCharacteristic temperatureCharacteristic;
+    uint16_t humidity;
+    GattCharacteristic humidityCharacteristic;
+    uint32_t pressure;
+    GattCharacteristic pressureCharacteristic;
+};
+
+#endif /* #ifndef __BLE_ENVIRONMENTAL_SERVICE_H__*/
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