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Biopay is a software system to operate a biodiesel cardlock for a group of people.

Biopay interfaces with a CardMaster™ Cardlock over a really long serial cable. It stores everything in a CouchDB. Biopay has a web application component, as well as background daemons to monitor the cardlock as well as other jobs such as payment processing.

If you'd like to see a demo of Biopay, go here: