FrSky X9D+ 雙向傳輸協定

為了之後使用arduino  DIY  接收機的參考資料:

http://bbs.5imx.com/forum.php?mod=viewthread&tid=1171576&highlight=x9d

arduino有現成的lib可以用!!!

http://www.rcgroups.com/forums/showthread.php?t=2245978

官方spec

https://drive.google.com/file/d/0B3S1vckBpeolUFR5T1docXprSjQ/view?usp=sharing

https://drive.google.com/file/d/0B3S1vckBpeolVkJYd0E1MEE2Skk/view?usp=sharing

https://drive.google.com/file/d/0B3S1vckBpeoldzBMUzlRbVQ0S0k/view?usp=sharing