設置指定事件發生時將調用的事件處理程序(回調)函數。
用法
bleCharacteristic.setEventHandler(eventType, callback)
參數
- eventType:事件類型(BLESubscribed、BLEUnsubscribed、BLERead、BLEWritten)
- callback: 事件發生時調用的函數
返回
無
示例
// create switch characteristic and allow remote device to read and write
BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);
// assign event handlers for characteristic
switchCharacteristic.setEventHandler(BLEWritten, switchCharacteristicWritten);
void switchCharacteristicWritten(BLEDevice central, BLECharacteristic characteristic) {
// central wrote new value to characteristic, update LED
Serial.print("Characteristic event, written: ");
if (switchCharacteristic.value()) {
Serial.println("LED on");
digitalWrite(ledPin, HIGH);
} else {
Serial.println("LED off");
digitalWrite(ledPin, LOW);
}
}
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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.setEventHandler()。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。