I've been having trouble uploading the TH3DUF_R2 firmware to my CR-10. I've already successfully flashed the bootloader using my Arduino, but when I try to upload the bootloader I get this error:
avrdude: ser_open(): can't set com-state for "\\.\COM4"
Things I've tried:
- Changing the usb drivers
- Changing the baud rate
- Using a different computers without any other usb devices
My printer is not functional right now with just a bootloader and no firmware, so I'm not really sure where to go from here.