Here is a capture using Saleae Logic (8 ch) analyzer… Output looks great! but input is still 0xFF… wtf!
The Saleae Logic software is free online and you can use it to view my capture.
You might see that the first byte is 0x40 instead of 0x00 …. thats because all COMMANDS are to be OR’d with 0x40 to signify its a COMMAND then followed by 2 zero bytes 0x00, 0x00.