controlUnitSerial

var controlUnitSerial: String?

This field is set when customer makes an order:

control unit is not required by the application, then this field is null
If ActivationDetailsInfo.controlUnitLocation == ControlUnitLocation.REMOTE, then one of the connected control units will be selected automatically
If ActivationDetailsInfo.controlUnitLocation == ControlUnitLocation.DEVICE, then
control unit will be selected by com.srv4pos.server.api.activation.ActivationDetailsInfo.controlUnitSerialNumber
or null if customer wants to order a new one

. This field can be changed by sales person when he activates an activation.