Hi Paul. I think the speed you achieved is already a good number and it is similar to a test from another user on the Wiznet blog (https://maker.wiznet.io/scarlet/projects/boost-your-w5100s-evb-pico-with-hardwired-tcp-ip/).
On the theory side, the Pico runs at 125MHz (125Mbps), but the SPI clock divides this by 2 (to get a clean signal border) -> now around 60Mbps. On top of this, internal buffers (shared between the CPU sockets) gives you another limitation.
Another limitation comes from the MicroPython framework, which takes a number of cycles to send a bit on the wire. For example, if you would transmit data from a C firmware I think it would give you a some speed improvements, but you would lose the MicroPython simplicity and you wouldn’t get so big speed improvements.

At the end, i think thath reaching 8-10 Mbps is a great result for Raspberry Pi Pico with the WIZnet Ethernet HAT

I’ve been working on a door access control system using the PICO and WIZNET Ethernet hat, I really like both devices. However, I can’t get the Ethernet have to connect at 100Mb/s, ( it’s fine at 10Mb/s ) and this is not a problem for my application using MQTT, but the system is up and running, but the 10Mb/s connection speed is an itch I’d like to scratch. Have you noticed the same behaviour ? Or is it just a problem between my Wiznet and TPLink swich ?

About my project: I have a Pico 2 with a Wiznet hat managing a cheap ( from Amazon ) RFID card reader over the Weigand protocol. The PICO sends MQTT requests when a Card is presented to a back-end system that interfaces with a MySQL db that provides user authorisation, and card validity. Once the credentials are authorised, the Acknowledge is sent back to the card reader, but also to another PICO and WIznet device to manage the electronic door lock. This is because the external card reader is physically distant from the internal door lock.

Next thing, I’d like to try is audio, since the PICO 2 is idle 99% of the time, I think it could handle digitised speech too.

Anyway, interested to hear your feedback on the WIZnet 10/100 Mb/s issue

Sure you can! 😀

WIZnet have a good news about design contest of WIZnet Ethernet HAT & W5100S-EVB-Pico.
For more detail, You can refer to “https://maker.wiznet.io/wiznet-ethernet-hat-contest/”.
Can you introduce the good news to your homepage? It would be even more appreciated if you directly participate in this contest.
If you want, Feel free contact to me. Thank you so much.

Hi Chris, sorry for the late answer. Is that meaning that you found the answer?

#HTTP Request handlers with routing params
@web_app.route(“/gpio_toggle///”)
def gpio_toggle(request, gpio, value, isPerm):