Can iOS device use External Accessory Programming to communicate with Muse headband?


I am having problem using libMuse to get the correct sampling rate of EEG data. Here is my post :

So I am wondering if I could use EA to communicate with Muse directly. Using the EAMemo project from Apple Developer, I could see the connection is set up successfully. But the app could not receive any data. I understand that for serial communication, there are some preset values have to be sent to the device before the client could receive any data. Would appreciate if any one could advise on how to write the presets to the output stream.

Thanks in advances.