How to modify the Stop Byte with Python SDK

edited June 2017 in Cyton
Hi I have been searching around in the tutorials and in the forums,  but I have not found any resource that explains how to change the stop byte that is being used for sample packets.
I want to change auxiliary data to include a timestamp of the board time, but I get a consistent "<Unexpected END_BYTE found <192> instead of <198>". I made some changes to the open_bci_v3.py script in order to read the aux bytes in the proper order, and I changed the END_BYTE variable to 0xC6. I also tried updating the firmware and calling "board.ser.write('<')" in my code prior to streaming, since '<' is the command to activate time-stamping. 

There has to be a simple step that I am missing.

Thank you.
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