Add Second Stage Bootloader (SBU) for MKRNB 1500#549

Merged

aentinger merged 6 commits intoarduino:masterfrom

Jul 22, 2020

Commits on Jul 16, 2020

Commits on Jul 17, 2020

Adjust bin size to use sketch.ino.mkrnb1500.bin and NOT sketch.ino.with_bootloader.mkrnb1500.bin
giulcioffi
committed

Commits on Jul 21, 2020