Hi there,
I got the sensor yesterday and final get it work. I used the latest raspberry image(2018.6.27). then i run below command to install grovepi.
sudo curl -kL dexterindustries.com/update_grovepi | bash
sudo reboot
at last, i run below commands and it is the output. thanks.
pi@raspberrypi:~/GrovePi/Software/Python/grove_i2c_sunlight_sensor $ python simpletest.py
Press Cntrl + Z to stop
Vis: 263
IR: 297
UV Index: 0.03
Vis: 263
IR: 297
UV Index: 0.03
Vis: 263
IR: 297
UV Index: 0.03
Bill