Esp32S3 design : Which protocol I can use in order to send datas on the "Internet" using MQTT?

[ThomasESP32]

Good afternoon,

Some years ago, I worked on a Renesas RX65N program and with external help, I managed to
send datas from my program to a broker on the Internet using MQTT.
The communication protocol that I used was LTE-M, NB-IOT
=> So in order to do that, a BG96 chip was put on a satelite card and the Renesas dialoged with the BG96 over UART.

Now, I am working with an Esp32S3 and I am looking for information about protocols that I can use in order to do the same job ?
Maybe LTE-M, NB-IOT was not the best (A Sim Card was needed so extra data cost).

Do you have any knowledge about that ?
I am wondering if I can use MQTT over WIFI if a WIFI access point is accessible from the chip ? (With this solution, no extra data cost).
Maybe there are other technical solution but I do not have more knowledge on this subject ?

Could you please help me ? Do you have any idea about other technical solution with advantages/drawbacks ?
Best regards,

[lbernstone]

You can of course use mqtt on wifi, or you can connect to mqtt over a cellular connection over ppp. As mentioned in another thread, google and ChatGPT know lots of this information.