Modifying MK3.5 firmware? How to?
I have a 3s, looking at upgrading to a 3.5.
Here is the snag: I have it modified with a Mosquito hotend, and I would like to increase the nozzle max temp to at least 400.
The way I see it, I have 3 options:
1. Modify the Prusa FW. I haven't played with FW since it was just Marlin 1.x as an Arduino sketch on an ATMEGA, so I'd have some catch up homework to do.
2. Drop in something like a BTT SKR Pro (will handle the chamber heater, chamber thermister, exhaust fan, etc), and start from scratch with vanilla Marlin or Klipper.
3. Leave it a 3s, run Octoprint (can octoprint on a Pi handle the extra GPIO for the extra chamber heater/thermister/vent fan??). This is my least favorite option, honestly.
For simplicity, I think I'd prefer to stay with the Prusa software ecosystem, but not if modifying the FW will be a huge PITA. This printer will NOT get an MMU as it will be in an enclosure and be my high temp dedicated printer. Thoughts and/or instructions?
Oh, my other printers:
MK3s (3.5 kit sitting in a box, getting ready for install. Has GPIO board and accelerometer. This printer has an MMU3)
Prusa Mini (OG production run 😀 Bondtech extruder, revo hotend, ASA-CF printed parts)
Voron 2.4 rev2 from an LDO kit. 350mm goodness!