According setting setps in ant message protocol and usage.pdf page 16.
After set all preparation parameters like Network Key, Assign Channel, Set Channel ID...
the host MCU callback function ANT_OpenChannel() to open the channel, AP2 return MSG ID 0x15 "CHANNEL_IN_WRONG_STATE" in most case(90%), but the host MCU can get back the setting parameters e.g. Network Key, Assign Channel, Channel ID... identical with the settings previously, It's say the parameters to be received by AP2 correctly. Why can't open channel correctly at last?
:( :( :( :... [img size=640]
http://www.thisisant.com/images/fbfiles/images/AP2_Channel_Settings.JPG[/img]