Hello I have a Tricolor Mendel with Melzi boards from 2013-06-06(the date on the label). I have not re-uploaded the code to the boards, but I am familiar with Arduino enough to be able to. I have been using them for almost a year, and they have recently been having communication issues. I mainly use Octoprint running on a Raspberry Pi to control the printer, but I sometimes use Pronterface. I haby chickenchuck040 - Controllers