read Characteristic value max length is 20 ?

[torretorich]

hello @Ficat
i am calling this function in notify call back to read the data that come from my BLE device

@Override
        public void onCharacteristicChanged(byte[] data, BleDevice device) {
          readValue = new String(data);
          System.out.println(data.length);
        }

and i get length of data is 20 and my ble device send data of 50 to 60 character string.
how can i increase the size of the data to read all value that come from my BLE device?