Attempting my own jab at this, need pointers.

[jayclees]

I'm a web developer dabbling in rust with no experience in hardware and such things, but I'm very, very interested in trying to build something similar myself.

I am stuck at part 1: how did you intercept the data between the handset and the controller? I have a Jarvis desk from fully with a jcb35n2-110 controller.

I've looked for some kind of ethernet middle man device that might be able to intercept the traffic (couldn't find it). I've attempted to connect the handset ethernet directly to my ubuntu machine, but it won't turn on, and it doesn't seem to be detected. I'm basically stuck at this point...

Apologies for such novice questions. Any pointers would be appreciated :)

[phord]

That's not Ethernet. It's an RJ-45 connector, but in this case it carries proprietary signals and power. The pins are all documented in my project.

I decoded the signals using a cheap logic analyzer ($20) that's Salae Logic compatible. I took an Ethernet cable and cut it in half to expose the wires. I soldered them all to a breadboard so I could attach the logic analyzer leads to the pins while the desk was operating.

I have some professional background with serial devices, so recognizing the line level protocol was pretty simple. The analyzer could even decide the serial for me once I identified the protocol and bit rate.

Good luck.

[jayclees]

Hi. Thanks for your response. A couple questions:

1. It seems there are no more Saleae compatible logic analyzers for Logic 2. Can I use PulseView with a cheap logic analyzer instead?
2. You said it's not an Ethernet cable, but an RJ-45 one, but you said you cut an Ethernet cable. Did you actually use an Ethernet cable for that task, or was that a typo?
3. Is there a community (discord, etc) that I can join where I can ask questions about this topic?

[Ego-Matthisum]

I can only answer 2: RJ-45 technically just the connector, typicaly Ethernet- and RJ-45-cable can be used interchangabely as most ethernet cables use RJ-45 as a connector. i.e.: You can just use an Ethernet cable

[phord]

I used this one with PulseView:

USB Logic Analyzer - 24MHz/8-Channel - SparkFun Electronics https://www.sparkfun.com/usb-logic-analyzer-24mhz-8-channel.html

I think you can find the same one even cheaper on Temu and AliExpress, but I haven't tried those.