Diff: services/BatteryService.h

Revision:

118:620d28e7a1ba

Child:

238:905d6fc17fda

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/BatteryService.h	Mon Sep 22 10:59:09 2014 +0100
@@ -0,0 +1,61 @@
+/* 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_BATTERY_SERVICE_H__
+#define __BLE_BATTERY_SERVICE_H__
+
+#include "BLEDevice.h"
+
+/* Battery Service */
+/* Service:  https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.battery_service.xml */
+/* Battery Level Char:  https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.battery_level.xml */
+class BatteryService {
+public:
+    BatteryService(BLEDevice &_ble, uint8_t level = 100) :
+        ble(_ble),
+        batteryLevel(level),
+        batteryLevelCharacteristic(GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, &batteryLevel, sizeof(batteryLevel), sizeof(batteryLevel),
+                                   GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) {
+
+        static bool serviceAdded = false; /* We should only ever need to add the heart rate service once. */
+        if (serviceAdded) {
+            return;
+        }
+
+        GattCharacteristic *charTable[] = {&batteryLevelCharacteristic};
+        GattService         batteryService(GattService::UUID_BATTERY_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
+
+        ble.addService(batteryService);
+        serviceAdded = true;
+    }
+
+    /**
+     * Update the battery level with a new value. Valid values range from
+     * 0..100. Anything outside this range will be ignored.
+     * @param newLevel New level.
+     */
+    void updateBatteryLevel(uint8_t newLevel) {
+        batteryLevel = newLevel;
+        ble.updateCharacteristicValue(batteryLevelCharacteristic.getValueAttribute().getHandle(), &batteryLevel, 1);
+    }
+
+private:
+    BLEDevice           &ble;
+    uint8_t              batteryLevel;
+    GattCharacteristic   batteryLevelCharacteristic;
+};
+
+#endif /* #ifndef __BLE_BATTERY_SERVICE_H__*/