Epson Moverio Pro BT-2000 Developer's Manual page 160

8.8.23. setGattCallback
Function

Register the BluetoothLeGattCallback class where the callback function used for GATT
functions is mounted.
Format

void setGattCallback(BluetoothLeGattCallback callback);
Parameter

Model name
BluetoothLeGattCallback callback
Return value

None
Callback function for the GATT function

See the callback function descriptions in 8.8.29 to 8.8.35 for information on the callback
function for GATT functions that can be registered to the BluetoothLeGattCallback.
MOVERIO Pro Developer's Guide (Rev.1.4)
Explanation
Callback class
154