so i am trying to burn bootloader to my new atmega 328 pu chip, but it fails, becouse the programmer expect there to be atmega 328 P
i am using 2 boards to burn bootloader.
somewhere someone suggested to use minicore addon, but there is no support for "PU" chip. but someone added this
"After that you can select Tools > Board > ATmega328 and then Tools > Variant > 328 / 328A."
so i did, bootloader seemingly uploaded succesfully, but this orange LED keeps blinking 3 times, 1 sec pause, 3 blinks and so on.
cant upload sketch, error from arduino IDE:
avrdude: ser_open(): can't open device "\.\COM5": The system cannot find the file specified.
dont know what to do now anymore. there is simply no tutoriel on internet on how to burn bootloader to "PU" version. (or google just didnt show me them.)