Jumper, thanks for responding.

Well I’ve never written a bootloader before but I’m game. If I write my own bootloader I might as well write it to check the controller ID address, if it is the correct address continue bootloading as normal. I think that would be less complex than having the controller check ID address of incoming message then send a huge file to a ee afterwhich you pass to the bootloader.

Don’t you think the bootloader could be written to check ID then a function byte, then either load program or handle as a standard incoming message/data?

Wayne