Every positive pulse is a bit .
The first (long) pulse is a wakeup bit (stating at 9 ms)
The first bit of the first byte start at ~10.5 ms , the first byte ends at ~24 ms (length 13500 micros for 8 bits)
The first bit of the 2nd byte starts at ~24.5 ms and ends at ~48 ms (also length 13500 micros for 8 bits )
speed equals to about 592 baud