RAK3172 frequency trimmer values

What is the recommended setting for the XTA and XTB trimmer registers with the RAK3172 module?

Using the latest RUI3 firmware (v4.0.1) on the RAK3172-E, I’m seeing the frequency is about 10kHz high, which isn’t too bad, AFC will handle this OK.

FWIW, using firmware built with STM32Cube and the STM32WL firmware package (v1.2 and v1.3 both), I found the optimal setting is 0x14 for these registers. Of course this could vary with the 32MHz crystal inside the module but it’s consistent over 5 modules I checked.