I had the same 1.1.5 issue as reported by others where it would only boot sometimes, but also that i didn't have a real usbisp/usbasp device (03EB/C8B4) so i couldn't get avrdude to work it, with it as some other guy did to fix it (using asbusp-clone and setting PID/VID in the config also didn't work).
Was going for the arduino ide self compile over usb way (since i also couldn't use usbasp there as well) as others reported working, but the laptop i used was very slow so while arduino was loading stuff i googled some more and found someone explaining how to do it all using progisp using the files from this website and that did the trick for me: https://medium.com/@jethro_20307/creality-ender-3-pro-bltouch-v3-1-marl…
1.1.5 + progisp
I had the same 1.1.5 issue as reported by others where it would only boot sometimes, but also that i didn't have a real usbisp/usbasp device (03EB/C8B4) so i couldn't get avrdude to work it, with it as some other guy did to fix it (using asbusp-clone and setting PID/VID in the config also didn't work).
Was going for the arduino ide self compile over usb way (since i also couldn't use usbasp there as well) as others reported working, but the laptop i used was very slow so while arduino was loading stuff i googled some more and found someone explaining how to do it all using progisp using the files from this website and that did the trick for me: https://medium.com/@jethro_20307/creality-ender-3-pro-bltouch-v3-1-marl…