Step01
Program the debug code. Then power up and plug in USB cable to pc

Step02
Open comm port in realterm. You have to type in the non standard speed 4100

Step03
Tick newline mode in display tab

Step04
It runs for a while then displays the humidity, temp and direction count then repeats

Step05
Humidity is 0 to 100 %, temperature is (n-5000)/100 and direction is a count under 9000

Step06
You get these numbers if sht20 isn't working

Step07
And this number if the direction sensor isn't working

End
Sometimes after awhile something gets confused. I just cycle the power