查詢該特性是否已被其他藍牙®低功耗設備訂閱。
用法
bleCharacteristic.subscribed()
參數
None
返回
- true如果特征值已被另一個藍牙®低功耗設備訂閱,
- false否則
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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注:本文由純淨天空篩選整理自arduino.cc大神的英文原創作品 ArduinoBLE - bleCharacteristic.subscribed()。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。