I'm still having no luck with this. So, trying to break it down a little for troubleshooting. Could someone confirm for me that I have the correct string and then three bytes necessary to fire the rear coupler on engine id 66:
String: 111111100010000100000110
Byte 1: 11111110
Byte 2: 00100001
Byte 3: 00000110
Reference:
0xFE (Hex) = 11111110 (Binary)
66 (Decimal) = 1000010 (Binary)
Thanks!!!