I eventually found the issue! Though I'm unsure how to best proceed... I found that I can load the ULP binary in the DeepSleep class, but I had to move the ulp_run and esp_deep_sleep_start calls to my main file. This can work, but I would prefer to push my deep sleep function calls in to my DeepSlee...

I am trying to bitbang SPI during the ESP32 deep sleep mode with ULP. I've connected a logic analyser to debug the signal. I am getting strange inconsistent behaviour where the SCK line will always do something, while MOSI/MISO will very rarely do anything. Screenshots attached. When I have managed ...