i am currently desinging a system in wich i use 3 ATmega328p. All of them have a different use and
obviously a different programm flashed. These ATmegas328p are all soldered onto a PCB and this PCB should not be accessable by the customer (only if possible). My problem is that i want to be able to do Software updates via 1 usb connection for all these arduinos. Is there a way to do that?
I am not looking for solutions like using a ISP header for every single one.
PS: please overlook any tipos or spelling errors. I am not native english