"Ive got the same problem. I have noticed when osd is disconnected 3rd radio shows heartbeat activity. The instant I connect osd the heartbeats die. The same osd board can flashed with kvosd and it works with a naze32."
"Thank you for the fast reply!
I rechecked the wiring again. I have successfully flashed the eBay board with both 2.0 and extra. I have received conflicting on which is the right one for apm. All of the previous descriptions are with 2.0."
"Hi everyone
Ive been racking my brain, read wikis and watched all the you tube videos I can find and asked in FB group.
I have an apm2.6 from witespy, a minim osd from eBay/neweer and also an osd from witesty ( which I cant connect to, but thats…"
"Yes I think so...I'm pretty sure its the same my Asus HD7. You will have to root it. Google ''framaroot'' for instructions to enable USB hosting, then a couple apps I used ''USB OTG helper'' and ''USB host controller''