獲取一個 BLECharacteristic,表示設備提供的 Bluetooth® Low Energy 特性。
用法
bleDevice.characteristic(index)
bleDevice.characteristic(uuid)
bleDevice.characteristic(uuid, index)
參數
- index: 特征指標
- uuid:uuid(作為 String )
返回
- BLECharacteristic對於提供的參數
示例
// begin initialization
if (!BLE.begin()) {
Serial.println("starting Bluetooth® Low Energy module failed!");
while (1);
}
Serial.println("BLE Central scan");
// start scanning for peripheral
BLE.scan();
BLEDevice peripheral = BLE.available();
if (peripheral) {
// ...
Serial.println("Connecting ...");
if (peripheral.connect()) {
Serial.println("Connected");
} else {
Serial.println("Failed to connect!");
return;
}
// discover peripheral attributes
Serial.println("Discovering attributes ...");
if (peripheral.discoverAttributes()) {
Serial.println("Attributes discovered");
} else {
Serial.println("Attribute discovery failed!");
peripheral.disconnect();
return;
}
BLECharacteristic batteryLevelCharacterisic = peripheral.characteristic("2a19");
if (batteryLevelCharacterisic) {
// use the characteristic
} else {
Serial.println("Peripheral does NOT have battery level characteristic");
}
// ...
}
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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 - bleDevice.characteristic()。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。