I have a battery operated unit & according to the data sheet I should be able to read the VDD pin
However, when I look in the nrf-saadc.h it does not have this listed
so I added it the line "#define NRF_SAADC_VDD 9"
I tried adding it to my dts file
I initialise it without errors
but when I try to read it I get in error code -22
I did try 8 but that doesn't even initialise
