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I wish to start my vending business, but none of the existing vending machines fit my needs. So, I need to choose the "brains" to my vending machine under current development.

The user experience of my vending machine will be:

User change their products on touchscreen display (firegox open rails application running in the "brains"), insert moneys, after that products will be returned to the user and notification (json query) will be send to it saas.

There are requirements:

  1. Popular (I want to use a widely used computer for better support)
  2. Debian-like or CentOs like system (easy to develop rails apps on them)
  3. Big count of GPIOs
  4. Working with touch-screen and large display (at least 15")
  5. Working with mdb protocol (for currency detector needs)

So, I need your hints. It seems that BeagleBone is more powerful then Raspberry Pi, but there is one problem: It doesn't support many of the video outputs. Is there any solution to make good video output on BeagleBone? Do other such computers exist?

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    $\begingroup$ Neither is really suitable for a production product - both are designed for prototyping and rapid-development! $\endgroup$ – Andrew Nov 17 '14 at 12:01
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    $\begingroup$ Side note: if your vending machine failed to give the product, please give back the money!! $\endgroup$ – Shahbaz Dec 16 '14 at 9:29
  • $\begingroup$ @Andrew can you offer me a cob which designed for rapid-development & production mode? $\endgroup$ – asiniy Dec 20 '14 at 10:49
  • $\begingroup$ @asiniy - no... you would design your own PCB $\endgroup$ – Andrew Dec 21 '14 at 10:23
  • $\begingroup$ If you want to use Multi-drop Bus (as opposed to CCtalk), you need a true 9 data bit serial port (ignore any hacks which tell you to use the parity bit as the 9th data bit - they have timing problems) $\endgroup$ – Mawg Dec 14 '15 at 13:02
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I would recommend sticking to Raspberry Pi for few reasons:

  1. Popularity - Raspberry gives 30,900,000 results in Google and Beagle Bone Black only 1,900,000.
  2. Raspi have Raspian - Debian for ARM
  3. Raspberry could easily drive even 32' or more HD display. Beagle has some limitations on resolution.
  4. Raspberry will work with MDB protocol if you buy some hardware (MDB to RS232) Example here: http://www.waferstar.com/en/MDB-PC.html

  5. Future proof - you could use compute module if you wish to make your product modular.

Reasons for Beagle Bone Black 3. Pin count - 96 vs 40 for Raspberry.

I think that you design with using web browser only to connect to Ruby on Rails application could be too much for embedded design because this could be achieved with Tkinter for Python or similar http://visualruby.net/ if you want to use Ruby language.

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    $\begingroup$ Also I don't see how the greater computational power of a Beagle Bone has an advantage when it comes to a vending machine. Also yes, it has more GPIOs but in a case of a Raspberry Pi you can always add more by adding a shield (this can also be done with a Beagle Bone of course). Even if you only want to make coffee/hot chocolate etc. you will still need additional boards to control the various motors you will have to integrate in the system. $\endgroup$ – rbaleksandar Nov 16 '14 at 13:35
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Check out the new Raspberry Pi Compute module, it was created for things like this.

And you can begin development on a regular raspberry pi in the meantime.

I personally believe the Raspberry Pi is completely years ahead of everything else goes as far as maturity and suitability for use in production, as evidenced by this new compute card targeted at embedded system, above and beyond just prototyping.

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