查询该特性是否已被其他蓝牙®低功耗设备订阅。
用法
bleCharacteristic.subscribed()
参数
None
返回
- true如果特征值已被另一个蓝牙®低功耗设备订阅,
- false否则
示例
// Bluetooth® Low Energy Battery Level Characteristic
BLEUnsignedCharCharacteristic batteryLevelChar("2A19", // standard 16-bit characteristic UUID
BLERead | BLENotify); // remote clients will be able to get notifications if this characteristic changes
if (batteryLevelChar.subscribed()) {
// set a new value , that well be pushed to subscribed Bluetooth® Low Energy devices
batteryLevelChar.writeValue(0xab);
}
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