@patakopecek said in Prusa laser filament sensor:
And how hard would it be for you to integrate it?
I'm not going to, because using I2C feed data back from the hot end is poor engineering and would create a lot of support issues, because of interference from extruder, hot end and fan cables. I only implement things I can support. But RepRapFirmware is open source, so you or anyone else can fork it and add the support if you want to.
The Duet3D one is undergoing an extended beta test and is not yet on sale.