@frank-w A fun fact about this issue.
After trying a couple of times and removing the UART Device (I tried a couple of them, but both were causing the same issue) both SFP ports started working along with the WiFi.
If this is literally an issue with the UART device, I still didn’t get what’s the fix, although I’ve followed this topic
Hey @ericwoud could you share how I could share some sort of diagram or images of how that’d look like? My electrical skills are on the basics level so I’m not being able to envision both your suggestion or the one on GH that @frank-w linked.
These are bi-directional, so you can use them for RX an TX. Standard 10k pullup, this might already be large enough. Now I doubt if it is true that on HV you could also use 3.3V. You could try, but if that does not work, you can use all 4 shifters. So 3.3V - 5V - 3.3V, since there are 4 on the board anyway.
But if 10k is high enough, I believe the ESP has similar high internal pullups.
That’s really darn cool piece of information @frank-w and @ericwoud . I really appreciate your time guiding us on how to do that. I’ll see if I buy some of these and attach it to to the TX RX (and probably GND as well, right?) to the UART interface to see how that goes.