Looking for Outdoor Illuminance Data

project_sensors

(James) #1

Inspired by @takissd 's Weather Station Tile 2.0, I’m looking to create a virtual outdoor illuminance sensor. I would then use this to more intelligently turn on my indoor lights, ie turn them on a little sooner when its cloudy out, etc.

I’m wondering if anyone with an actual outdoor illuminance sensor would be able to collect/provide some data to help with this. Essentially, I’d need 3 columns of data: Time of Day, the weather type (see weatherIcon value in Weather Station 2.0), and the outdoor lux value. In addition, I’d just need the zip code where the data was collected so I could calculate time of day relative to sunrise/sunset.


Light/Luminance Sensor suggestions please
(Patrick Stuart [@pstuart]) #2

This devicetype is built into the ide, but have to add it to devices manually

It has a virtual LUX outdoor value, that might be just what you are looking for? Could poll this for the values pretty easy using the Google Docs logger Smartapp as well.


(James) #3

Yeah, this is exactly what inspired me - the method for calculating the virtual lux value seems awfully arbitrary. I’m just looking to get some real data to: A) see how good the above method is at estimating, or B) improve the above method.

For example, from https://en.wikipedia.org/wiki/Daylight I know that on an overcast day the lux is 1000 at midday and 40 at sunrise/sunset. I’m looking to get some data to help fill in the gap between those two values.


#4

The Aeon multisensor is compatible with SmartThings and outdoor-rated for everything except its motion sensor. (The motion sensor’s intended to only be used indoors as it gets too many false positives outdoors.) it can measure luminance, temperature, and humidity.

Many people in the community have it, so you can find a lot of discussion. Some people give it very harsh reviews because they want to use it as a motion sensor outdoors, but the manufacturer says it won’t work for that so discount that part of the criticism. :wink:

The older 4-in-1 model may be somewhat cheaper if you can find it and also measures luminance, temperature, and humidity. So you could also consider that. Again the motion sensor capability is not intended to be used outdoors.

Aeotec is one of the largest manufacturers of zwave devices which means many people carry it, but it also means the prices can vary wildly depending on where you buy from. Check multiple Amazon sellers, zwaveproducts.com , Vesternet, tiger direct, new egg, thesmartesthouse.com , smart home.com , homeseer.com , and any other reputable retailers. Always check the return policies before buying, those vary a lot also. Aeon will not honor the warranty for anything bought off of eBay because they say those are all used even though they aren’t.


(Patrick Stuart [@pstuart]) #5

I’m 90% sure the bloomsky device does true outdoor lux values, kind of overkill but you might be interested in its other features? www.bloomsky.com There is a community device (written by an ST employee tslagle) that works well with it.


(Mike Maxwell) #6

The Fibaro multi does a great gob with outdoor lux. Measures up to 32k lux.
I’ve had one mounted outside for almost two years now, just for measuring lux. You’re welcome to my pacific Northwest data if you tell me where you want it.


(James) #7

If you wouldn’t mind fishing out hourly lux values for both a sunny day and maybe an overcast day, that would be enough to get me going. I just want to get a better understanding of outdoor lux as a function of time, relative to sunrise/sunset.


(Mike Maxwell) #8

zip 98012, sunny all day

2016-04-03 8:02 PM PDT - 19 hours ago illuminance 0 lux lux
2016-04-03 7:47 PM PDT - 19 hours ago illuminance 9 lux lux
2016-04-03 7:32 PM PDT - 19 hours ago illuminance 52 lux lux
2016-04-03 7:17 PM PDT - 19 hours ago illuminance 147 lux lux
2016-04-03 7:02 PM PDT - 20 hours ago illuminance 271 lux lux
2016-04-03 6:47 PM PDT - 20 hours ago illuminance 476 lux lux
2016-04-03 6:32 PM PDT - 20 hours ago illuminance 652 lux lux
2016-04-03 6:17 PM PDT - 20 hours ago illuminance 659 lux lux
2016-04-03 6:02 PM PDT - 21 hours ago illuminance 769 lux lux
2016-04-03 5:47 PM PDT - 21 hours ago illuminance 896 lux lux
2016-04-03 5:32 PM PDT - 21 hours ago illuminance 1037 lux lux
2016-04-03 5:17 PM PDT - 21 hours ago illuminance 945 lux lux
2016-04-03 5:02 PM PDT - 22 hours ago illuminance 1291 lux lux
2016-04-03 4:47 PM PDT - 22 hours ago illuminance 1397 lux lux
2016-04-03 4:32 PM PDT - 22 hours ago illuminance 1319 lux lux
2016-04-03 4:17 PM PDT - 22 hours ago illuminance 1086 lux lux
2016-04-03 4:02 PM PDT - 23 hours ago illuminance 1961 lux lux
2016-04-03 3:47 PM PDT - 23 hours ago illuminance 2272 lux lux
2016-04-03 3:32 PM PDT - 23 hours ago illuminance 1876 lux lux
2016-04-03 3:17 PM PDT - 23 hours ago illuminance 1848 lux lux
2016-04-03 3:02 PM PDT - 24 hours ago illuminance 1806 lux lux
2016-04-03 2:47 PM PDT - 24 hours ago illuminance 1876 lux lux
2016-04-03 2:32 PM PDT - 1 day ago illuminance 1947 lux lux
2016-04-03 2:17 PM PDT - 1 day ago illuminance 1919 lux lux
2016-04-03 2:02 PM PDT - 1 day ago illuminance 1721 lux lux
2016-04-03 1:47 PM PDT - 1 day ago illuminance 1891 lux lux
2016-04-03 1:32 PM PDT - 1 day ago illuminance 2257 lux lux
2016-04-03 1:16 PM PDT - 1 day ago illuminance 2568 lux lux
2016-04-03 1:01 PM PDT - 1 day ago illuminance 2370 lux lux
2016-04-03 12:46 PM PDT - 1 day ago illuminance 3330 lux lux
2016-04-03 12:31 PM PDT - 1 day ago illuminance 3753 lux lux
2016-04-03 12:16 PM PDT - 1 day ago illuminance 4120 lux lux
2016-04-03 12:01 PM PDT - 1 day ago illuminance 5136 lux lux
2016-04-03 11:46 AM PDT - 1 day ago illuminance 6435 lux lux
2016-04-03 11:31 AM PDT - 1 day ago illuminance 8749 lux lux
2016-04-03 11:16 AM PDT - 1 day ago illuminance 12418 lux lux
2016-04-03 11:01 AM PDT - 1 day ago illuminance 12983 lux lux
2016-04-03 10:46 AM PDT - 1 day ago illuminance 13547 lux lux
2016-04-03 10:31 AM PDT - 1 day ago illuminance 9144 lux lux
2016-04-03 10:16 AM PDT - 1 day ago illuminance 6914 lux lux
2016-04-03 10:01 AM PDT - 1 day ago illuminance 3288 lux lux
2016-04-03 9:46 AM PDT - 1 day ago illuminance 3005 lux lux
2016-04-03 9:31 AM PDT - 1 day ago illuminance 2709 lux lux
2016-04-03 9:16 AM PDT - 1 day ago illuminance 2173 lux lux
2016-04-03 9:00 AM PDT - 1 day ago illuminance 3273 lux lux
2016-04-03 8:45 AM PDT - 1 day ago illuminance 3640 lux lux
2016-04-03 8:30 AM PDT - 1 day ago illuminance 3316 lux lux
2016-04-03 8:15 AM PDT - 1 day ago illuminance 2864 lux lux
2016-04-03 8:00 AM PDT - 1 day ago illuminance 2130 lux lux
2016-04-03 7:45 AM PDT - 1 day ago illuminance 1806 lux lux
2016-04-03 7:29 AM PDT - 1 day ago illuminance 1001 lux lux
2016-04-03 7:14 AM PDT - 1 day ago illuminance 575 lux lux
2016-04-03 6:59 AM PDT - 1 day ago illuminance 271 lux lux
2016-04-03 6:44 AM PDT - 1 day ago illuminance 87 lux lux
2016-04-03 6:29 AM PDT - 1 day ago illuminance 12 lux lux
2016-04-02 8:07 PM PDT - 2 days ago illuminance 0 lux lux


#9

Outdoor lux readings are mostly a function of cloud cover. You can have very low Lux if it rains in the morning and then if it clears by the afternoon you could have a 3 o’clock reading which is much much higher than your 11 AM reading.

You can find a lot of information about this on solar energy sites. Because obviously that’s a big issue for those installations. :sun_behind_small_cloud::partly_sunny:️:cloud_with_rain::sunny:

This is a good overview article:

http://sustainabilityworkshop.autodesk.com/buildings/measuring-light-levels


(LJ) #10

Hello Mike,

To capture the data, do you use something like :

LJ


(Mike Maxwell) #11

I was using numerous until it went belly up, honestly I have no need for archived data sets.


(Mike) #12

There have been many discussions on this and the consensus seems to be that the Bloomsky luminance sensor was really only designed to distinguish day from night and therefore isn’t very accurate relative to real lux values. I believe this info originated from Bloomsky themselves and was posted in the main Bloomsky thread.

Update: Here is the comment on the topic from the Bloomsky employee:


(phil) #13

I would really like to use smart weather but it does not provide constant illumanance data no matter how often you refresh it. I just wish there was a weather station that you can count on to provide the data every so many minutes


(Mike Maxwell) #14

50-60 bucks, your choice, the new aeon multi, or the Fibaro , then there is no worrie…


(Jeff Jolley) #15

Did this ever get anywhere? I could really use actual illuminance. I’ve always wondered why someone doesn’t just calculate the lux from the solarradiation measurement from weather underground.

lux = solarradiation / 0.0079