Hello, FabioBogado ,
Unfortunately, we do not have information on configuring devices using SMS commands.
In this case, it is best to contact the manufacturer or seller of the device, they will be able to help with this issue.
Nevertheless, we found a manual for your device, where the commands are described, with examples of commands and responses.
Take a look at the link. – https://usermanual.wiki/Suntech/ST310U/pdf