How to implement auto calls using a GSM modem and Windows?

Question

satellite navigation

There are a certain number of GPS trackers that transmit current location data to the server using built-in GSM modems. The GPS tracker has a SmartSleep feature to save battery power. The tracker switches to SmartSleep mode during a certain period of inactivity (or under other circumstances, depending on the settings). You can wake up the tracker by calling the SIM card number in the GSM module or by pressing the corresponding button. Since the trackers are in different locations and also move, it is very problematic and generally stupid to wake them up by pressing a key))) There is an idea to auto-dial these trackers according to a certain scenario using a GSM modem connected to a PC. How to implement it? I am new to this business and a lot of general information on the Internet only confuses. I'd like to hear an expert's opinion.

Answer 1

See the AT commands of the desired modem alex-exe.ru/radio/wireless/gsm-sim900-at-command
In Windows, you can use this script

echo ATD+79000000000; >> COM3
timeout 30
echo ATH0 >> COM3