I recently got e raspberry pi3 and the GrovePi+ Starter Kit.
Now i got the following problem: i tried to run the grove_ultrasonic.py example (i changed the port because my ultrasonic Ranger V2.0 is on Port 8) but it shows me "random" numbers like:
There is nothin in front of the sensor.
My Software Setup is the following:
I prepaired my microSD as described here: https://www.raspberrypi.org/documentation/installation/installing-images/windows.md
I followed your instructions from here: https://www.dexterindustries.com/GrovePi/get-started-with-the-grovepi/setting-software/
After that done i get a TypeError
So i did the firmware update as you describe on your site.
And now i have the values as mentioned above
I have also tried out the raspbian for robots and i get the same output.