Bluecherry

www.openbravo.com/product/pos/
OpenBravo POS is open source point of sale software. It is java based, and free to download and use.

It is easy to configure and install, and comes with an embedded Derby database, ready to go.

It runs well on Ubuntu, and does not require any proprietary hardware. It is a popular choice for open source users, so suits BlueCherry's customer type.

OpenBravo POS has a setting for Customer Display.

Customer Display is the 30 x 4 LCD screen on top of some registers.

The customer display is a simple serial device. OpenBravo offers several output formats like surepos, epson, javapos to suit different manufacturers devices. You don't need a customer display to test or for implementation of this BlueCherry feature. You simply look at what is coming in on the serial port. Minicom can be used for testing to show what is being received.

With the <output><display> tags inside OpenBravo, you can control what gets written to the display.

By default it shows the items as they are scanned, the total amount tendered and the change.

These are just what you want as a transparent video overlay on the shop counter camera.

It can be done with a serial cable, out OpenBravo on POS PC, in BlueCherry on Camera PC. Or a loopback cable if same PC, or a virtual loopback serial port /dev

With open source javapos standard you could do additional stuff like link Customer Display to a tcp server, so no cable would be required, and BlueCherry could pickup the POS display data feed over the wire. Javapos is supported by a number of POS systems, so would give BlueCherry wider reach in POS support.