my previous post has brought up another question which I hope someone can answer in short. A link would be fine as well, of course.
I would love to know what a bootloader is generally useful for and how that is basically done. Everywhere I looked on the net the information is obviously a bit above what I can understand or beyond what I want to know.
So my first question would be:
In what cases is it necessary or better to use a boot loader compared to ISP, i.e. what advantages are there?
One answer I already know is that ISP is not possible with the RESET pin being disabled (see previous topic).
Second: How is this basically done? (How to connect the AVR, where to, which software to use, …).
Third: Any disadvantages?
Thanks a lot for your time!!