I am working on getting an analyzer so it'll be another week or so. In the mean time... As for the half/full duplex thing. That makes sense and being this is full duplex it sounds like I should write 4 bytes if expecting 3 in return. Is that right? And I was playing with different len of settings fo...

I have been trying for a few days to figure out how to get SPI to work and have had no luck. Board is ESP32 Wrover Kit Slave is AD7124 ADC chip ESP-IDF v5.0 The ADC works with other platforms I have so there is not issues with it. I don't have a way to scope signals so I am stuck with debug printing...