Mum buys vending machine to stop kids getting unhealthy.
Surely you could plug your own device into that port and vend free food all day long. The trick is that they use a 9 bits instead of 8, and manufacturers aren't exactly open with their command protocols. I never got it to work, but if you are going to hack a vending machine, that's how you'll do it.

A vending machine is an automated machine that provides items such as snacks, beverages, cigarettes and lottery tickets to consumers after money, a credit card, or a specially designed card is inserted into the machine. The first modern vending machines were developed in England in the early 1880s and dispensed postcards.Vending machines exist in many countries, and in more recent times.

This video demonstrates a way to hack a vending machine for change. First, you should press the top selection button four times, and then press the very last button three times. Then, hold the fourth button from the top and press the last button once more. If done correctly, the vending machine will return four quarters (one dollar) in change.

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JamesKesn teaches you how to hack a vending machine. You must use a very specific machine and an exact combination of button presses. For this it is: far left Pepsi, near right Mountain Dew, near left Pepsi, far right Mountain Dew. Then far left Pepsi, near right Mountain Dew. Again, far left Pepsi, near left Pepsi, near right Mountain Dew and far right Mountain Dew.

But someone told me about these vids on youtube that showed you how to get drinks out the machine for free. There are several methods. One way is to press in what you want, then hit the coin return button at exactly the right time and you will get your money back and a drink. There a way to reprogram the machine so that drinks cost like 5p (5cents).

But there there was one old snack machine that was put into a gay sauna that sold cock rings, lube, g strings etc, as well as snacks because you can build up a wicked hunger. They also had a drink machine. So In some drink machines you need to put in a thin red tube, about 30cm long, in the can rotor if you want to dispense smaller cans like red bull. They didn't need these tubes but asked if.