Controller

Now , the Producer class produces GUI and tech instances .

List of tech instances:

1. Controller Core
   * 2 thread for 2 liddars
   * decides when to take a shot of the parcel
   * recieves the barcodes ( wrong )
   * reports the gui ( wrong ) about barcodes , weight
   * saves the txt file ( perhaps , it wrong )

2. Modbus unit

* Auto - establish the connection

* Report subscribers about the losts and data changes

3. Barcode unit

* Recieves data

* Report subscribers

4. Camera unit

* Provides RAM - saving the images

5. Integration unit

* Saves the data