Success!

Now that I have a few more runs worth of data, I was able to pick a little bit of information out of the miCoach binaries.

There are 40 EXRCS001.BIN files on the device (after the data has been unpacked), each one corresponding to an individual workout. This means you can store up to 40 workouts before you need to sync the device again. Knowing that, I had a bit of a better idea what I was looking at.

The miCoach pacer records various data points periodically – every few seconds as far as I can tell. The record length for these data points is 14 bytes. So far we have:
0x1E – row number, increments one each row
0×21 – distance
0×23 & 0×24 – Not sure exactly what the values are, but these dropped to 0 at a point where I paused the pacer and the miCoach graph shows a stride/pace of 0
0×25 – stride rate
0×26 – same situation as 0×23 and 0×24
0×27 – heart rate
0×28 – Not sure what this is, but it’s the same for each row
0×29 – time in. I think this is in seconds, but I’m not sure. It goes up by 5 each record.

At the start of the file, from 0×07 to 0×10, is a bunch of data that I suspect to be the date but haven’t figured out an obvious format. For my workout on 5/20/2010 9:58am, the hex values are 01 5A 4F B4 3C A7 53 B4 3C 24 8C

Yay progress!