ESP32 - Onewire library

Any ideas how I can debug onewire library?

I think my wiring is ok, however ow.search() is not returning anything.

Would the onewire lib be using timer functions that might not be implemented properly yet?

I added this to get around an error, but have not got any futher:

 case JSHPINSTATE_GPIO_OUT_OPENDRAIN_PULLUP:
    mode = GPIO_MODE_OUTPUT_OD;
   pull_mode=GPIO_PULLUP_ONLY;
    break;