The Arduino Reference text is licensed under a Creative Commons Attribution-Share Alike 3.0 License.

Find anything that can be improved? Suggest corrections and new documentation via GitHub.

Doubts on how to use Github? Learn everything you need to know in this tutorial.

Reference > Libraries > Arduinoble > Blecharacteristic.valuesize

ArduinoBLE - bleCharacteristic.valueSize()

Query the maximum value size of the specified BLECharacteristic.

Syntax

bleCharacteristic.valueSize()

Parameters

None

Returns

  • The maximum value size of the characteristic (in bytes)

Example


// Bluetooth® Low Energy LED Switch Characteristic - custom 128-bit UUID, read and writable by central
BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);



Serial.print(“value size = “);
Serial.println(switchCharacteristic.valueSize());