Easy way to fade the on-board LED?

[mahe]

Hi,

I want to fade the on-board LED from off to full brightness (preferably in a color of choice). Is there an easy way to implement this?

I want to use a for loop, however I'm not sure how to do that with the HEX value formating for the LED (e.g. from 0x00000 to 0xffffff)

Thanks!

[livius]

@mahe
for this puropose you can use HLS color scheme and manipulate brightness
e.g. use this lib
https://github.com/Benhgift/micro-color-clock/blob/master/hls.py

[mahe]

@livius

Thanks! I couldn't figure it out (quite new to python).. Ended up with this:

    def rgb_to_hex(red, green, blue):
        """Return color as #rrggbb for the given color values."""
        return '%02x%02x%02x' % (red, green, blue)

    for i in range(256):
        color = rgb_to_hex(i,i,i)
        pycom.rgbled(256-int(color,16))
        time.sleep(0.005)

This just fades from white to off, removing the '256' fades from off to white.. Probably not the smoothest way to do it, but it works. :)