What model of temperature controller with the ability to send data via GSM should I use?

Question

Electronics

Hello
I am looking for a temperature controller with the ability to connect at least 5 wired temperature sensors and the ability to periodically send data via the Internet (GSM) to a web portal in any format (json, xml, etc.). Maybe someone faced a similar task, I found many companies on the Internet that provide such controllers, but they are tailored for their service, and I need the controller to be pre-programmed to send data to its own server. If the controller has additional settings, such as the frequency of sending, this will be a plus.

Answer 1

You can take an arduino and a GSM module from aliexpress. Connect as many DS18B20 sensors as you want from the same aliexpress to the arduino via 1-wire.
With AT commands, you force the GSM module to make a connection to your server and proxy the UART from the arduino there. The Arduino will periodically take the temperature from the sensors and send them to the GSM module.
If a high frequency of polling sensors is not needed, then it makes sense to put the GSM module to sleep in the periods between sending data.