A TID is a tracker ID, a two-character identifier of your chosing, your initials, say. This TID is published in the JSON payload of each message published by OwnTracks and is meant to be used as a short identifier which is easier to read than a rather long topic name.


The TID of your friends is displayed on the OwnTracks map if you don't have an address book entry associated with that friend, and if said friend has no retained card published.