add "-c file" capture option to save all serial output
add "-c file" capture option to save all serial output

tve/embello,smurfix/embello,jeelabs/embello,jeelabs/embello,tve/embello,jeelabs/embello,jeelabs/embello,smurfix/embello,tve/embello,jeelabs/embello,smurfix/embello