Grove Chainable RGB LED v2.0: How to Get White?

reivilo · June 7, 2020, 9:14am

How to get the white colours on a Grove Chainable RGB LED v2.0?

Sending myRGB.setColorRGB(0, 255, 255, 255); shows a redish colour, not the expected white.

Thank you!

Baozhu · June 8, 2020, 1:31am

myRGB.setColorRGB(0, 255, 255, 255) What color is it? Do you have any pictures?

reivilo · June 8, 2020, 9:06am

leds.setColorRGB(0, 255, 255, 255) gives red.

Baozhu · June 9, 2020, 1:36am

@reivilo Is your hardware connection working? 14 and 12 pin correspond to CLK_PIN and DATA_PIN

reivilo · June 9, 2020, 6:59am

Yes, I can display primary colours like red, green and blue.

Baozhu · June 9, 2020, 7:42am

That should be able to get white by adjusting R, G, and B.

reivilo · June 9, 2020, 8:39am

Indeed, but why the recommended code leds.setColorRGB(0, 255, 255, 255) doesn’t show white as expected?

Is the RGB LED faulty?

reivilo · June 11, 2020, 1:59pm

@Baozhu Is my RGB LED defective?

Baozhu · June 12, 2020, 12:53am

I am not sure, I read the specification carefully, the specification does not specify that (255,255,255) shows white.

reivilo · July 9, 2020, 9:51am

Not very convincing I’m afraid.

I performed more tests with the same RGB LED but attached to the Wio Terminal and the Seeeduino v4. No problem to get white colour with 255,255,255 with either 3.3V or 5V.

So the problem may come from the Wio Link board.