Hi
Please follow the steps and links below.
SMS command structure:
<SMS login><space><SMS password><space><command><space><value>
SMS command getinfo example:
If you have set SMS login and password: login pass getinfo
If SMS login and password are not set leave two spaces before command: getinfo
We have a list of SMS/GRPS command: https://wiki.teltonika-gps.com/view/FMB_SMS/GPRS_Commands
Note: If you are going to send the GRPS command it should be in Codec 12 format: https://wiki.teltonika-gps.com/view/Codec#Codec_12
getinfo
Example command: 000000000000000F0C010500000007676574696E666F0100004312
Best Regards
Maynard