I have a Rpi2 with GrovePi+ and Grove Chainable RGB LEDs (chain of 3).
I can’t even make the Python sample grove_chainable_rgb_led.py.
First, I adjusted the code to run with ‘numleds=3’.
Then the ‘pin’ parameter for the chainableRgbLed_* functions wasn’t initialized. I chose to use the same value as for the ‘chain’ variable; 7 as the LEDs are connected to D7.
Now the scripts runs but nothing happens at all. The LEDs stay lit with a nice continuous light blue