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...

Not sure if you wanted to have your own test code for this, but did you see "Run memory test on SPI RAM initialization" in menuconfig ?