View Source BlueHeron.ATT.ExecuteWriteRequest (blue_heron v0.5.4)
The ATT_EXECUTE_WRITE_REQ PDU is used to request the server to write or cancel the write of all the prepared values currently held in the prepare queue from this client. This request shall be handled by the server as an atomic operation
Bluetooth Spec v5.2, vol 3, Part F, 3.4.6.3