Change RGB bulb color based on local outside temperature

#13

i wanted it turn real red only if it gets that high which it never does. so, turns reddish but never red. :smile:

#14

Yep

#15

Works like a charm, thanks!

#16

you are welcome.

#17

@KiloWatts can you show us the finish webcore piston? Thanks I like it.

#18

download (11)
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Works like a charm. I have my colors on the richer side, but you can change the range to suit your needs.

Question about weather forecasts
#19

@KiloWatts Thanks for sharing. I have import the last one and it working good and I like the colors I also like the richer side as you said. Thanks

#20

I really like the concept of this piston, but I’d like to use the forecast high for the day. However, when you do the forecast, it returns 3 days and not just today.

$weather.forecast.forecast.simpleforecast.forecastday.high will return [[celsius:32, fahrenheit:89], [celsius:33, fahrenheit:92], [celsius:34, fahrenheit:94], [celsius:34, fahrenheit:94]]

Ideally I’d just use the .fahrenheit at the end to just get that, but I’m not sure how to handle the grouping like that. I was also looking to do an alert if there is rain/sleet/snow as well. Hopefully figuring out how to handle the list will help with that too.
Thanks!

#21

I love this piston, it works great using my outdoor temperature sensor and one Trådfri RGB-light.

The only thing I would like to change and that I can’t accomplish is how to skip the green range of colors?

My temperature range is -20C to +30C and the hottest and coldest 10-15 degrees are great since they move within the blue and red color space. If possible I would like cold white color at 0 degrees C and everything below shoud go from white to dark blue and everything above from white through yellow to red.

Is this possible using rainbowValue or combining it with something else?

#22

Hmm, you might try framing the expression into two segments. One rainbowvalue for everything between -30C (-22F) and ~15C (60F), and another between 15C (60F) and 38C (100F). Basically you could skip past the green stuff with a new rainbowvalue path.

#23

Thank you for your reply!

I have tried, but most of the time it just gets stuck at what I’m guessing #FFFFFF. What way through the colorspace does rainbowvalue take? Is it through a color wheel or something else?

Any advice on what hex to use for blue to white and white through yellow to red? :slight_smile:

#24

I think it’s just ROYGBIV… So if you want blue–>white–>yellow–>red, you might split it into 3 parts.

Part one blue to white #0000FF thru #FFFFFF
Part two white to yellow: #FFFFFF thru #FFFF00
Part three yellow to red: #FFFF00 thru #FF0000 (this will also pass through orange)

Those are pure colors, btw, if you want any particular shade you’d have to customize a bit.

#25

Thank you very much for your help!
I’m not good at this so I really appreciate it. :slight_smile:

This expression runs without errors, but I’m guessing I have to do it another way since the light stays white no matter what the temperature is. If I just use one rainbowvalue it changes color so the rest of the Piston is set up correcly. Do I have to make three different expressions to get it running?

piston
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Cheers!

#26

I’m not able to experiment at the moment but I think you can put it all in one expression using a ternary operator:

https://wiki.webcore.co/Expressions#Ternary_operator_.28_c_.3F_t_:f.29

Paging @bangali

#27

try this for the set color to statement:

(temp > 0 ? rainbowValue(temp, 0, ‘#FFFFFF’, 30, ‘#FF0000’) : rainbowValue(temp, -20, ‘#0000FF’, 0, ‘#FFFFFF’))

#28

Big thanks! That did the trick.

#29

can you post the whole code? :slight_smile:

#30

Of course!

webcore
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#31

Thanks :slight_smile:

#32

Hello,

i need help with my RGB controllers.

  1. If one RGB Controller change the color to …
  2. All RGB Controllers also going to switch to the same color.

Any Idea´s to realice this in a Piston?