Version 1.8 of the tracking server contains many improvements - you can find the changes below. I've also had the opportunity to run around and test a thinkrace tracking watch - and it's awesome. It supports many body stats including heart rate, SPO2, systole/diastole, and heart rates above 120 ( xexun does not support this). You can find this device here
Changes in version 1.8:
-Fix WiFi caching
-Add SPO2, heart rate, temperature, systole and diastole for thinkrace
-Fix thinkrace wifi parsing
-Add MSG= command for thinkrace devices to send a warning/message.
-Add manual for thinkrace devices
-Included icons as static image files.