Transcendent: I'm using Octoprint. Slice on my desktop and upload, easy as. What made you choose Repetier?
I started off with Repetier but moved to octoprint to give it a try. I found that with octoprint it would fail on some occasions to lower the extruder after heating up. I also found that I was having phantom movements(Re-homing movements) and on one occasion the temp spiked to being set at ~220c when it was only set to 180c, and I felt the manual controls on Repetier where better.
Repetier has a undocumented API, and in the end I built some camera software(https://github.com/geocom/DiamondMind-Extras) for the pi to do the same sort of thing as the octoprint does. and the temp graph was a loss but not a major.
It may have improved since I tried it but at the time I just found Repetier to be far more reliable. I was talking with they guys who build the DiamondMind and they where having much the same issues with octoprint.