Sending an SMS from Mudi V2 with EM060K modem

Hello, does anyone know how can I send an SMS from a GL-E750V2 Mudi V2 router with EM060K modem?

There is nothing special about this router or this modem.
You will need sms-tool and kmod-usb-serial-option packages.
If you need a web GUI for that, you can also install a 3rd party package called luci-app-sms-tool-js


Do however note, the GL-E750v2 isn't supported by OpenWRT, and you're (probably) using Gl.iNET's version of it.

Whatever help you get here, may or may not work with the firmware you're using.