I made the same assumption, which is why it took me a while to figure it out. Since nothing made sense, I went back and checked everything yet again... then I noticed the tiny air gap on the TDI pin.

For the record, this is what it looks like when the jtag TDI wire is not connected...

Did you get debugging running with these connections?

I am using the same usb jtag adapter and cable but a differetn ESP32 board and I get several OpenOCD errors, see this post

Hello, I am trying to get OpenOCD to work on my Sparkfun ESP32 Thing using a FTDI C232HM-DDHSL-0 usb jtag interface using this diagram . OpenOCD sees the two esp cores but also shows lots of errors (bottom). I've had to make custom cfgs for the esp32 thing and the jtag, this may be the problem. I've...