News on my MDB projects

Because i've got a lot of emails during the last year with several questions about my MDB projects, i try to answer them here. The MateDealer, what is it exactly? I've called my main MDB project MateDealer because my vending machine primary vends...

The MDB protocol [part 4]

I just want to announce that i've published my MDB cashless device code for the MateDealer project on github. It would be nice to get some feedback! Here is the github repo: MateDealer@github

The MDB protocol [part 3]

Last Tuesday I’ve nearly finished the complete code for the MateDealer project. After I’ve successfully vended a Club Mate (that is the drink the MateDealer got it’s name from) I loged the MDB communication with my logic analyzer. I have taken a...

The MDB protocol [part 2]

Today I want to show you how I connected our vending machine to the Arduino Mega 2560. With a piece of stripboard i made a board that can be stacked on an Arduino like a real shield. As you can see the board is really simple. It contain just 2 …

The MDB protocol [part 1]

In 2010 I've bought a vending machine for our hackerspace. After we used it for a while with the built-in coin changer device, we noted that we need another way to pay the drinks. So i decided to build a not yet defined type of cashless payment...