Hi. I've been working on my custom app that works works with my Casio watch over BLE.
I've intercepted the data and it turns out that bytes are actually DESCENDING with time.

Code:
7e 19 f8 fa f1 f5 d3 f8 
7e 19 f8 fa f1 f5 d2 d6
7e 19 f8 fa f1 f5 d1 cd
Those three data points were taken one after another, approx. one minute apart, the last on the list was also the last in real time.
I know...