The lab is scheduled, but the test tool will not upload over serial. I can only assume it's because it changes the baud rate for upload from what is selected 115200 to 921600 which is more than my FTDI cable can support. Console: ESP_MAC: 00:00:00:00:00:00 Connecting........_____....._____....._____...

As I mentioned, it does not appear to work. Either I am misunderstanding this change, or it is not used when using the Arduino framework.

I also tried using:

I have a PCB where I need pullups on GPIO34-39, because I was not aware the software ones do not work. The documentation is very misleading, they should not be called GPIO at all, but I digress.. However, I also see this post that suggests you can workaround by using the RTC subsystem, but I was not...

@joeservo Sorry I did not see this.

By manual I meant pressing the button to pull GPIO0 low, rather then letting the RTS/DTR do it.

I found that the 100nF cap I had on GPIO causes problems, my board only works to automatically program with no cap.

This looks good to me Paul. FYI, I found my issue, RTS and DTR are active low which is only clear on some schematics.

FWIW, I found the issue. RTS and DTR should have been inverted. Using FT_Prog on an FTDI adapter, you can just program the part to invert those outputs to active when low. The difficulty was is in diagnosing when those 2 inputs trip each other through the NPN pair. Here's what a correct sequence loo...

Paul, Wish I could offer good advice, but you may notice allot of the recent posts on this forum, including mine are on the same subject. So this reply is just to say, be wary, this is not a simple subject as it should be. Here is what I understand to be true. I hope someone will correct of I am wro...

My WROVER custom board has an RS-232 serial port rather than USB. I implemented the automatic programming circuit as in https://dl.espressif.com/dl/schematics/ESP-WROVER-KIT_SCH-2.pdf with 2 NPNs, a 12K pullup on EN over 2nF, and a 5 K pullup on GPIO0 over 1nF. In my case GPIO2 is open What's odd is...