Esp32S3 : How to use a 5G RedCap Chip or (eRedCap in the future) with the Esp32S3 ?

[ThomasESP32]

Good morning,

I am working with an Esp32S3 chip.
I am studying the possibility to exchange datas with a backoffice located on a server (Somewhere on the cloud) using a 5G RedCap Chip (eRedCap in the future).
According to the informations that I found, it should be possible to link the 5G RedCap chip with the Esp32S3 using an UART.
It seams that configuring an UART with DMA capability at 3Mbps with hardware flow control should be OK, here is what I found using IA
 1 Pin UART TX
 1 Pin UART RX
 1 Pin UART RTS
 1 Pin UART CTS
 1 Pin RESET : To Reset the Chip
 1 Pin PWR_KEY : To turn the Chip ON
 1 Pin WAKEUP/DTR : To wake the chip from low power mode.

Schematic :
5G Side | Outside | Esp32S3 Side
5G RedCap (Chip) <===> UART (DMA capability) <===> Internal 128 bytes buffer <===> SRAM 4kbytes buffer <===> PSRAM FileBuffer
Hardware Flow Control

Because I have other tasks that are running in my Esp32S3 at the moment (Audio, BLE, WIFI and so on...) I wonder how to synchronise
the datas transfer with the 5G chip so that they do not lock the whole firmware.
My goal is to manage to add datas exchange with a backoffice (Need to send parameters periodically, need to send audio files periodically, need to receive parameters and audio files when requested by the backoffice) without locking the whole existing firmware.

Have you ever worked on this kind of feature ?
Are there examples that I can use in order to develop these features ?
Do you have extra informations that could help me to anticipate upcoming developments on these features ?
(Articles, examples, ideas, informations, everything that could help me on the subject please).
Even information regarding 5G eRedCap chips would be welcome.

Thank you for your help on the subject,
best regards

Thomas TRUILHE

[lbernstone]

The typical way to interface a modem is with PPP (point to point protocol) using the esp-modem library.

[ThomasESP32]

Could you tell me more about this library please ?
Best regards