Print an error when serial number is invalid#691

Merged

me-no-dev merged 2 commits intoespressif:masterfrom

copercini:master

Oct 4, 2017

Commits on Oct 2, 2017

Print error when serial number is invalid
copercini
authored

Commits on Oct 3, 2017

Move to the first check, change end by return
copercini
authored