-
Notifications
You must be signed in to change notification settings - Fork 2
/
HIDBatteryService.h
67 lines (58 loc) · 2.58 KB
/
HIDBatteryService.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
/* 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 "ble/BLE.h"
/**
* @class BatteryService
* @brief BLE Battery Service. This service displays the battery level from 0% to 100%, represented as an 8bit number.
* 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 HIDBatteryService {
public:
/**
* @param[ref] _ble
* BLE object for the underlying controller.
* @param[in] level
* 8bit batterly level. Usually used to represent percentage of batterly charge remaining.
*/
HIDBatteryService(BLE &_ble, uint8_t level = 100) :
ble(_ble),
batteryLevel(level),
batteryLevelCharacteristic(GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, &batteryLevel, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) {
batteryLevelCharacteristic.requireSecurity(SecurityManager::SECURITY_MODE_ENCRYPTION_NO_MITM);
GattCharacteristic *charTable[] = {&batteryLevelCharacteristic};
GattService batteryService(GattService::UUID_BATTERY_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
ble.addService(batteryService);
}
/**
* @brief Update the battery level with a new value. [Valid values lie between 0 and 100];
* anything outside this range will be ignored.
*
* @param newLevel
* Update to battery level.
*/
void updateBatteryLevel(uint8_t newLevel) {
batteryLevel = newLevel;
ble.gattServer().write(batteryLevelCharacteristic.getValueHandle(), &batteryLevel, 1);
}
protected:
BLE &ble;
uint8_t batteryLevel;
ReadOnlyGattCharacteristic<uint8_t> batteryLevelCharacteristic;
};
#endif /* #ifndef __BLE_BATTERY_SERVICE_H__*/