I have found some boards present the same issues you talk about. The main problem is sending the 50MHZ signal over these long wires. I found that doing the following eliminated all my issues. Hopefully the wires you have come in a ribbon cable style like this, which you peel each one off. WIN_201805...

Just a quick question to confirm. I don't see how you are enabling / disabling the 50mhz clock on the Ethernet board. Are you really following the instructions from https://sautter.com/blog/ethernet-on-es ... g-lan8720/ You board should have a jumper from the OSC en pin to the NC pin on the header, ...

I agree that the cost of the RJ45 is high. However it has a few features that I like in it over others I have looked at. such as filtering on the POE lines, and I want to keep the size down, so having the transformer built in is a plus as well. As for the POE module. I am still keeping the original ...

I started on that design last week ;) I found a few Rj45's that have the magnetics and access to the power pins. https://www.digikey.com/product-detail/en/pulse-electronics-network/JKM-0201NL/553-3218-ND/5800452 I also added this POE module to the design. It can be added on top of the module for tho...

Not sure I follow what you are asking. This is not a Linux type system where it would need a proper shutdown.
It's like any other micro. Sudden loss of power is not an issue.

Personally, I am not a JTAG fan, never needed more than a simple printf.
That being said, I can tell you that the following does work just fine for the ESP32.
https://www.olimex.com/Products/ARM/JTAG/ARM-USB-OCD-H/

I tried the 1nf, but it worked on a few but not all prototypes. So I kept upping the capacitance while monitoring it with an oscilloscope until i got to a stable work ability across all boards. 0.1uf was the sweet spot for me, but you mileage may vary

I made my own programming board as well. Start with sticking a 0.1uf cap on EN to GND.

There is an example of pre-transfer callback in \esp-idf\examples\peripherals\spi_master
There is also a post-transfer callback as well that you can setup to tell you when the transfer is complete.
http://esp-idf.readthedocs.io/en/latest ... aster.html

Moved from News to Showcase, as it seems to give a bit of discussion. Thanks, you were correct. I should have put it here, sorry. Sorry guys, I did not get any e-mail alerts on this topic after I posted it so I just assumed that people thought it was a silly idea, and have done nothing with it sinc...