Hello hydrolisk1792,I am working on almost similar project. Can you please assist me with information on how to connect Arduino to MDB port of vending machine. Thank you in advance.
The Multi Drop Bus / Internal Communication Protocol is described here.
All I know right now is that you will need a 24 volt supply and that it is really close to RS485
Thank you hydrolisk1792. I'm also going through the same pdf to understand MDB better.
And I only know this because I'm a vending technician so I have all the access to parts and machines to my hearts content
hydrolisk1792. Cool. Can you please send me your email address. I wish to write to you.
Finally got the whole PDF downloaded. I did not read through the whole thing, but I would not consider what you propose, except on a PC. You would have to program a complete master controller and then add more to be able to diagnose error conditions that may be encountered.Paul