Garmin has tied down the ConnectIQ SDK quite a bit and so there are very limited options for writing FIT files. For instance it is only possible to write Session, Lap or Record message types, no Weight Scale message type unfortunately.
Therefore, for now this writes a Session message into a FIT file for a generic sport activity and stores a custom developer field "weight" in it.
Garmin has tied down the ConnectIQ SDK quite a bit and so there are very limited options for writing FIT files. For instance it is only possible to write Session, Lap or Record message types, no Weight Scale message type unfortunately.
Therefore, for now this writes a Session message into a FIT file for a generic sport activity and stores a custom developer field "weight" in it.