Use single LED to indicate download/upload

[ayufan]

This uses single LED for presenting download and upload:

1. red: download saturated,
2. green: download/upload OK,
3. blue: upload saturated,
4. magenta: download/upload saturated.

[BuloZB]

thanks for this

[Jan357]

I like this! Thanks. 👍

[ddrown]

I want to split out setting the LEDs from gathering the data. This way, people can customize what leds mean what.

[ddrown]

I've changed how this works in e88f248

This project now has an external config file, /etc/config/omnia-led-colors

The example config file still uses the lan0/wan LEDs:

config led wan
        option colorfunction 'bandwidth'
        option interface 'eth1'
        option direction 'in'
        option limit 300000000

config led lan0
        option colorfunction 'bandwidth'
        option interface 'eth1'
        option direction 'out'
        option limit 20000000

But I've created a new colorfunction "dualbandwidth" along your lines. Upload above 50% sets the color to blue, below 50% the color is set by the download speed. This example sets the wan LED.

config led wan
       option colorfunction 'dualbandwidth'
       option interface 'eth1'
       option limit_in 300000000
       option limit_out 20000000

This way you can customize what colors are set and when. Using a uci config file means a LuCI module could be created to manage these settings.