Upgrade error? Constant beep

[gianvyr]

a friend of mine has the firmware 1.9.60 on the plane. on the battery which firmware needs to install because I have 1.11.20 on my plane

 

[gianvyr]

dowgrade 1.10.09 ....ddddddddddddddddddddddddddddddddddddddddd....and led red

 

[SunsetCatcher]

dowgrade 1.10.09 ....ddddddddddddddddddddddddddddddddddddddddd....and led red

try check and update battery on another aircraft

 

[gianvyr]

try check and update battery on another aircraft

and which firmware I install above ?? that of my friend ??

 

[SunsetCatcher]

and which firmware I install above ?? that of my friend ??

yep, 1.9.6

 

[gianvyr]

yep, 1.9.6

OK I try. but how to do battery firmware update ?? I'll keep you up-to-date

 

[gianvyr]

Good morning, I finally have good news. I managed to install the signature. the problem was the information cable that connects the battery to the motherboard. was damaged and made a mistake on the battery. now I have installed the firmware 1.11.20, but i can not make the downgrade at 1.10.20 how to do ??