Java implementation of setting SMS sending time

Sending short messages regularly can be done by using thread timmer or user quartz framework.

Sending SMS requires the interface of SMS gateway. There are companies that provide short message service on the Internet, and they are required to develop their own gateway interface according to the interface.

You can also send SMS through serial port with sim modem and at command, but you need sim modem equipment. When purchasing equipment, you can ask the seller to provide development documents.