Diff: TemperatureService.h

Revision:

5:614164945894

Child:

6:ed0dc0647c01

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TemperatureService.h	Wed Sep 19 19:49:39 2018 +0000
@@ -0,0 +1,64 @@
+
+#ifndef __TEMPERATURE_SERVICE_H__
+#define __TEMPERATURE_SERVICE_H__
+
+#include "ble/BLE.h"
+
+#define UUID_TEMPERATURE_CELSIUS_CHAR 0x2A1F
+#define UUID_TEMPERATURE_SERVICE "5D34E2F0-3DD2-07AC-38F1-BBAD120EF852"
+      
+
+/**
+* @class TemperatureService
+* @brief BLE Temperature Service. This service displays the temperature, represented as an 16bit number.
+*/
+class TemperatureService {
+public:
+    /**
+     * @param[in] _ble
+     *               BLE object for the underlying controller.
+     * @param[in] temperature
+     *               16bit temperature in 0.1 degrees Celsius
+     */
+    TemperatureService(BLE &_ble, int16_t temperature = 200) :
+        ble(_ble),
+        temperature(temperature),
+        temperatureCharacteristic(UUID_TEMPERATURE_CELSIUS_CHAR, &temperature, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) {
+
+        GattCharacteristic *charTable[] = {&temperatureCharacteristic};
+        GattService         TemperatureService(UUID(UUID_TEMPERATURE_SERVICE), charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
+
+        ble.addService(TemperatureService);
+    }
+
+    /**
+     * @brief Update the temperature with a new value. Valid values lie between -2732 and above.
+     *
+     * @param newTemp
+     *              Update to temperature.
+     */
+    void updateTemperature(int16_t newTemp) {
+        temperature = newTemp;
+        uint16_t temp = (uint16_t)temperature;
+        ble.gattServer().write(temperatureCharacteristic.getValueHandle(), (const uint8_t*)&temp, sizeof(temperature));
+    }
+
+protected:
+    /**
+     * A reference to the underlying BLE instance that this object is attached to.
+     * The services and characteristics will be registered in this BLE instance.
+     */
+    BLE &ble;
+
+    /**
+     * The current temperature represented as 0.1 degrees Celsius.
+     */
+    int16_t    temperature;
+    /**
+     * A ReadOnlyGattCharacteristic that allows access to the peer device to the
+     * temperature value through BLE.
+     */
+    ReadOnlyGattCharacteristic<int16_t> temperatureCharacteristic;
+};
+
+#endif /* #ifndef __TEMPERATURE_SERVICE_H__*/
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