Downloading older firmware for Apm 2.8 / arducopter (error removed )

in this video we will cover, how to download older firmware for APM 2.8 or arducopter 2.8 , to remove error which we get when we try to upload firmware in the initial configuration setup, it will also remove errors while proceeding with the accelerometer calibration
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[@reegeecajes3226]

How to install the downloaded firmware?

[@rookiebroadcaster7279]

You can again download it and install it ,

[@jaykumarvora2156]

Can you help me out with apm 2.8, i have built y6 copter using apm 2.8 and now issue i am facing is that i am unable to arm the drone..yes the rx-tx works fine(have tested on basic servo) and have done the wiring properly but yet am unable to arm the copter..also i am using flysky ct6b rx-tx 6 channel remote controller

[@rookiebroadcaster7279]

sorry i couldn't reply to you , this is the same problem which i faced , here is link which can help you ,
th-cam.com/video/nIYJH8NSfLw/w-d-xo.html
i hope this will help you

[@coderceo9324]

Mukesh bhai thick se bata to dete firmware kaise install karu.

[@rookiebroadcaster7279]

Bhai kha diktat arhi Hai??