Set Geofence

Hi, I've been trying to perform the geofence command.
The traccar source code from github, doesn't give me the right comand letter only:

**,imei:<imei number>,114,22.553276,113.903516; 20.553276,114.903516

in the other commands the command are in letters like "M" disable alarms and so on.
in this case, "114", which would be the equivalent in letters to send the right command ?

Check your device manual.

My manual are only the commands in numbers, not letters, what would be the right manual to search ?

Ask your device vendor for the right manual.