Current Status

This applies to all of Zeblaze Zeband, Zeband Plus, Makibes F68, and many others, as they share most of the same protocol.

Most devices provide the same features, although the external appearance may be quite different. The variations in the protocol are minimal. More recent versions will have support for Unicode characters, while older versions will only support GB2312 characters. Hence, accented characters will be displayed as Chinese symbols. We workaround this the best we know.

Supported devices

GB2312

These devices will not display all accented characters correctly.

Zeblaze Zeband

Unicode

Zeblaze Zeband Plus
Makibes F68

Probably supported devices

S200
HPlus H4, H5, H9, K8 and others

Supported features

Discovery and pairing
Setting weight, height, age, date, time, day of week
Synchronise activity data: all stored not all is displayed
Notifications (Display + vibration) with differentiation between phone calls and messages
Display firmware version and battery status
"Real time" (10m) heart rate monitoring: the devices do not seem to provide true real time values.
Sleep monitoring: individual sleep phases stored but not presented. Only light and deep is presented
Calories and distance stored but not presented
Real time steps
Alarms
Configuration of some specific settings: Language, Real time HR State, Goals, Screen time.

Not implemented:

Inactivity Alarms: Messages are known. Requires some more code.
Configuration of some specific settings: (HR thresholds, Inactivity alarms, Enable/Disable SMS and Phone notifications in the device, Find Me)
Swimming statistics: Needs tinkering with the devices as messages are unknown
Activity only considers HR... So there is no activity charts if All Day HR monitoring is disabled.
Firmware update: Standard Nordic DFU process. No code developed

Development/work planned/ideas to be explored

Find if there is a configurable HR monitoring interval
Find how inactivity timers work
Some messages are not understood and require further tinkering
Temporarily enable All Day HR Monitoring, for 1-2 seconds, in order to get latest data from band. This would be a simple synchronization method for steps, distance and calories.