Komut
characteristic()
Açıklama
Cihazın sağladığı BLE özelliğini temsil eden bir BLEC özelliği edinin.
Sözdizimi
bleDevice.characteristic (endeks)
bleDevice.characteristic (Uuid)
bleDevice.characteristic (uuid, dizin)
Parametreler
index - karakteristik indeksi
uuid - uuid (dize olarak)
İadeler
BLEC Sağlanan parametreler için karakteristik
Misal
…
// begin initialization
if (!BLE.begin()) {
Serial.println("starting BLE 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");
}
// ...
}
…
// begin initialization
if (!BLE.begin()) {
Serial.println("starting BLE 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");
}
// ...
}
…
See Also
- discoverAttributes()
- discoverService()
- deviceName()
- appearance()
- serviceCount()
- hasService()
- service()
- characteristicCount()
- hasCharacteristic()
- hasLocalName()
- hasAdvertisedServiceUuid()
- advertisedServiceUuidCount()
- localName()
- advertisedServiceUuid()
- connect()