RS-232 extension cable via GSM modems?

Question

Data transfer

There is a logger that takes the temperature from 12 sensors. When the logger is connected to a computer via an RS-232 cable and the software is used, all data is read. This logger must be located in the production shop, and the data must be transmitted to the laboratory. I'm trying to set up transmission via the Cinterion MC52iT gsm modem, as is done with water and gas meters, but nothing comes of it.
[logenr]=[rs-232]-[gsm-modem] - - - [gsm-modem]-[rs-232]=[PC]
As far as I understand, this logger cannot send data with AT commands, how can I transfer data , do so to say gsm extension cable rs-232 port?

Answer 1

Quoting the Internet, to work with the Cinterion MC52iT GSM terminal, you need to connect an antenna, a DC source and any microprocessor controller or IBM PC type computer to its external connectors via a serial COM port (RS-232).
Option number 1: buy a radio bridge for RS-232, Google shows such for ~ $ 1000.
Option number 2: connect a microcontroller between the logger and the modem, which will control the modem and wrap the data from the logger into packets suitable for transmission.

Answer 2

The manual for the MC52iT clearly indicates the type of commands for receiving and transmitting messages via the RS-232 port. If the logger does not support the ability to send free type commands via RS-232, then you really have to use a controller. However, here the other side of the issue opens up - if the Internet is connected to the workshop, then it is easier to get by with a controller that will directly communicate with the receiving computer. The price will be even cheaper than two MC52iT modems. Not to mention the monthly costs of maintaining communication between modems.
"I'm trying to set up transmission via the Cinterion MC52iT gsm modem, as is done with water and gas meters." May I know what connection scheme is used?