RPI Zero + Multiple USB Ethernet dongles + HTTPS

[MoronGamer]

Hi there,

I have a project which I need to communicate with an ethernet RFID reader, an ethernet ADAM I/O and a backend web API over HTTPS. I'm thinking of connecting the RFID reader and the ADAM I/O directly using crossover cables so there's no need to use a network hub.

Questions:

Is it possible for a RPI Zero to communicate with 3 USB Ethernet dongles over an external usb hub using Circle? If so, does the hub/dongle need to be specific brand/chipset? And what about RPI 3/4 using on board ethernet + 2 USB ethernet dongles?

As for communicating with a server over https, is there any supported library that I can use?

Thank you!
Alfred

[hpingel]

HTTPS you can get via mbedtls which is part of circle-stdlib. But AFAIK there are no drivers in circle for USB-ethernet dongles or rfid readers.

[dlbogdan]

Well, being that all those devices are ethernet, I assume with proper documentation one can write drivers for them.
as for the driver for a USB Ethernet adapter, circle must have at least one driver. The embedded usb to ethernet chipset. Maybe if you can manage to get that as a dongle things would work fine.

[dlbogdan]

This MIGHT work:
https://ro.mouser.com/new/microchip/microchip-evb-lan7800lc-1-dongle/

[rsta2]

Unfortunately this is not possible, because Circle can handle only one active network interface at a time. Yes, there aren't drivers for specific USB Ethernet NICs in Circle, only a driver for the QEMU CDC Ethernet NIC. TLS support is in the circle-stdlib project, which includes Circle as a submodule.

[MoronGamer]

Thank you!