I have been thinking of building the same, but using ESP32 insted of the Pi. Oled screen for quick readouts, web ui with configuration and graphs, logging to the real database are on the planed features list.
I take it you did it in Python? I’d be interested in taking a look.
That’s similar to what I use… an ESP8266 hooked up to a TLS2591
Cross post from the “”What did you mod today?“”:What did you mod today? - #7024 by gchart thread from last February:
Sort of. You could easily configure it to start on a button press, but I just start mine with an ssh command.
For anybody interested. It seems like the following Lux Meters are actually the same, sold under different brands:
There seem to be actually 2 versions though
Reed Instruments SD-1128SD
Lutron LU-LX1128SD
PDF: http://www.sunwe.com.tw/lutron/LX-1128SDeop.pdf
General DLM112SD: https://www.tequipment.net/GeneralDLM112SD.html
There is another version, which is the LX-1148SD
Lutron LX 1148SD: https://inspectusa.com/lutron/manuals/lx-1148sd-manual.pdf
Sunwe LX 1148SD: http://www.sunwe.com.tw/lutron/LX-1148SD.pdf
Voltcraft LX-2000 : https://asset.conrad.com/media10/isa/160267/c1/-/fr/001666060PI06/image.jpg
The obvious difference betwen these 3 (LX 1148SD) and the LX 1128 is the number of buttons.
Maybe this is another one:
Francaise-instrumentation LX 108 : https://www.distrame.fr/publicmedia/formatted/769/996/fr/LX108-luxmetre-face.jpg;maxh=400,maxw=470.jpg
One thing i found out is that they look cheap but they are not cheap
$210?!
I had the same problem with Excel.
I ended up adding a column starting at 0, and progressing at the sample interval. Using that as a time scale.
I like Libra Calc for the graphs, but could never get the darn thing to put a time scale on the graph correctly. It seemed to have a mind of it’s own as far as making the time interval on the axis.
But other than that, it worked well and is free.
I have been using one of the osram diodes that seem to be inside all of the reasonable cost lux meters.
In one of the circuits from Terry’s vast diode test. They are quite cheap.
I measure with PICO-Log software. But that’s not a stand alone option.
All the Best,
Jeff
Python is your friend.
Ha!, I’m too old, Python is your friend,
Fortran 4 was my friend…
Brute force in Excel. Never make an elegant formula, when 5 columns worth of obscure calcs will do….
All the Best,
Jeff
I have the strange feeling that they might actually (close to) be the same as the Extech SDL series.
Alghough the buttons are placed differently, the rest looks pretty similiar.
Chibim
This looks like a very interesting meter, it can record 2000 data points with a selectable interval, and its cheap, so it might be useful.
It has bluetooth and usb (for retrieving only probably)
Please find the manual Here
I’ve added a short post with a bit of information about what I ended up doing. It works great for me, and I’ll keep working on it to clean it up if there’s interest.
Very interesting!
I still have a raspberry pi catching dust on the shelf…
Nice!
If there is a nice read up on how to set it all up, that would be great!
No write up yet, it’s still pretty alpha. But if you can figure out how to get a Pi up and running you can work this out too!
Not really for me ;) I don't think I will dive that deep :) But for other members.
I’ve been meaning to post the details on my lumen tube build for some time, finally got a first-pass done.
https://github.com/gchart/luxmeter
That readout is snazzy
Thanks bmengineer! It’s pretty basic but it’s great having immediate visual feedback. It also displays the IP address at start up (despite using a reserved IP) and diagnostics in case any sensors aren’t detected.
Cool stuff gchart! Thank you for sharing!