This seems like an over-engineered solution to a non-problem. Formal stock control is only useful if you have serious issues (eg. theft, very large inventory, unidentifiable packages). The author could solve his problem by simply keeping ketchup in the kitchen like sane people.
So in summary there is a barcode scanner, a Raspberry Pi and a screen. Where's the label printer? Not quoted: still more cost! It would have been far cheaper and more practical to install a new shelf.
So in summary there is a barcode scanner, a Raspberry Pi and a screen. Where's the label printer? Not quoted: still more cost! It would have been far cheaper and more practical to install a new shelf.