Hi,
i'm facing this issue with Apm 2.8 board, newly build quad,
no error seeing on the Mission Planner, but when connected to battery alone, i could not arm my quad.
also only hear 3 beep.
when connect to laptop usb, and with battery, the board gave 4 beep, and i'm able to arm it,
anyone having same issue?
i'm quit newbie in DIY drone arena :)
Appreciate any feedback,
Thank you,
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