ESS.h

00001 /* ARM University Program Microcontroller Library
00002  * 
00003  * Environmental Sensing Service
00004  *
00005  * This software is distributed under an "AS IS" BASIS,
00006  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00007  */
00008 
00009 #ifndef __BLE_ENVIRONMENTAL_SENSING_SERVICE_H__
00010 #define __BLE_ENVIRONMENTAL_SENSING_SERVICE_H__
00011 
00012 #include <mbed.h>
00013 #include "blecommon.h"
00014 #include "Gap.h"
00015 #include "GattServer.h"
00016 #include "BLEDeviceInstanceBase.h"
00017 
00018 //#include "BLEDevice.h"
00019 
00020 /* Environmental Sensing Service */
00021 /* Service:  https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.environmental_sensing.xml */
00022 /* Humidity characteristic: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.humidity.xml */
00023 /* Temperature: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.temperature.xml */
00024 
00025 class EnvironmentalSensingService {
00026 
00027 public:
00028     /**
00029      * Constructor.
00030      *
00031      * param[in] _ble
00032      *               Reference to the underlying BLEDevice.
00033      * param[in] humidity percentage (16-bit unsigned, 2 decimals).
00034      *               initial value for the humidity value.
00035      * param[in] temperature in degrees Celsius (16-bit signed, 2 decimals).
00036      *               initial value for the temperature
00037      */
00038     EnvironmentalSensingService(BLEDevice &_ble, uint16_t humidity, int16_t temperature) :
00039         ble(_ble),
00040 
00041                 humiditychar(GattCharacteristic::UUID_HUMIDITY_CHAR, (uint8_t *)&humidity,
00042                 sizeof(uint16_t), sizeof(uint16_t),
00043                 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
00044 
00045                 temperaturechar(GattCharacteristic::UUID_TEMPERATURE_CHAR, (uint8_t *)&temperature,
00046                 sizeof(int16_t), sizeof(int16_t),
00047                 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)
00048                 
00049 
00050                 {   // Setup Service
00051                     
00052         GattCharacteristic *charTable[] = {&humiditychar, &temperaturechar, }; // 2 services. humidity and temp
00053 
00054                 GattService      EnvironmentalService(0x181A, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
00055 
00056         ble.gattServer().addService(EnvironmentalService);
00057     }
00058 
00059 
00060     /* Set a new 16-bit value for the humidity measurement.  */
00061     void updateHumidity(uint16_t humidity) {
00062         ble.gattServer().write(humiditychar.getValueAttribute().getHandle(), (uint8_t *)&humidity, sizeof(uint16_t));
00063     }
00064 
00065                  /* Set a new 16-bit value for the temperature measurement.  */
00066     void updateTemperature(int16_t temperature) {
00067         ble.gattServer().write(temperaturechar.getValueAttribute().getHandle(), (uint8_t *)&temperature, sizeof(int16_t));
00068     }
00069 
00070 
00071         
00072 private:
00073     BLEDevice                   &ble;
00074     GattCharacteristic          humiditychar;
00075     GattCharacteristic          temperaturechar;
00076 
00077 };
00078 
00079 #endif /* #ifndef __BLE_ENVIRONMENTAL_SENSING_SERVICE_H__*/
00080 
00081 
00082 // *******************************ARM University Program Copyright © ARM Ltd 2015*************************************//