Great to hear Opple is working on an LM5. I hope they will consider:
Dedicated app for LM 3/4/5 (all versions) with some ability to export / share data to file, email, Google Sheet, whatever
LM app should not require an account to use
If Opple engineers are good, they could create a library to share between their dedicated LM app and their other apps that may connect to the LM.
It would be great if Opple changed their stance on LM5 3rd party integration… They can design the GATT structure so that it’s very black-box and hides any special magic sauce IP they many not want to reveal.
Opple can delegate functions like device firmware updates or calibration to the official Opple LM app, and keep those APIs private … but publish API GATT characteristics for basics like:
CIE1931 x,y
CRI (Ra) R1-R15
Of course, they may simply not want anyone integrating with their device at all
Does anybody knows what happened with Android application v3.8.4, it shows either negative value for R9 or all values (Ra, CS,EML,R9) are not measured at all (seems because too big negative R9 value) while LED measurements (i do measurements LED bulbs)?
The android app completely doesn’t work for me, no matter what i do i can’t receive e-mail verification codes to register so i am unable to use the device.
I have bluetooth, location and all permissions enabled but it just flashes a “Network error” message. Anyone else had this happen? It’d be great if you could help.
I contacted their China office e-mail and Aliexpress with no response.
Do you mind Steve to send me the link for the last windows version? The mobile app is more convininent but if windows will provide better result, then will be no other choice. Thanks
I have a problem with my Opple Light Master 4. It does not measure CRI when light is brighter than about 200 lux. I cannot measure direct sunlight CRI or other things. Does anyone have the same issue, or know how to fi it?
So I’ve wanted to get a device to measure CCT and duv as part of my new flashlight hobby. FYI I can measure lux on my sekonic light meter.
My personal computing is all done on Mac and iOS.
Skimming through this thread it seems that I just cannot buy the Opple LM4. There seems to be a windows software app developed mentioned in the forum but I’m a Mac guy these days.
So I guess I should stay away from the Opple LM4 - do
you all agree?
Is there another hobbyist level device that can be recommended? Or any other recommendations?
Pretty much. The Android/iOS app is not reliable in measurement results. Steve, who works for opple, developed a way better algorithm to get good results from LM4 but this has not been added to the official apps and we don’t know if it ever will. He published his algorithm in a standalone windows-only application.
It might be possible to run it through Wine on Linux/MacOS, but I doubt that personally since it needs Bluetooth access.
I’ve been working on a few projects that may help people.
the AS7341 - while not great, it did an OK job for what it is. I found out, for example, fireflies sent me a 70CRI E21A NOV-Mu instead of CRI9080. It was useful enough to get that all resolved. Is it accurate / precise? No, it can’t really be given it’s nature, but the LM3 app showed it can be useful in some cases. I am very close to getting the data read into a new Android app like ceiling bounce but much more expanded. You don’t need LM3 / LM4, just a $15 board from adafruit
i have been in commmunication with adafruit to update the above mentioned AS7341 breakout to AS7343, but have nothing more to share at the moment. While better than the AS7341, this device is also limited, so we should not have great expectations.
More excitingly, though, I am adding Hopoocolor HPCS-310 support to my Android app. Hopoocolor, unlike Opple, is OK releasing the protocol specs, and the device should be much more accurate than LM3/4. I have to clarify some things with them about distribution, but hope to get that working in the next month.
If Opple does get around to releasing LM3/4/5 API etc I can add that to the app as well. It can at least free Opple from sinking resources on our feature needs, which is clearly not their market.
The app handles runtimes, beam profiles, colorimetry thanks to HPCS-310, and might include some other goodies like parsing Anduril model blinkies, which is too much for me to handle apparently (still working out the dash buzz in newer Anduril versions, which is hard to parse).
I’ll have more info about the app once its ready for testing, if you are interested you can be added to Google Play internal testing track. I’ll let folks know when that is ready, not there yet. If there are any specific integrations / output formats let me know. Right now it handles sqlite & csv output (bulk) and MQTT / NATS / Webhooks for streaming.
I’m excited to hear that. I recently got an HPCS-310 and have been impressed with it, but I’m not really a fan of the WeChat mini program that’s required to use with my phone. Also, it’s inability to export the raw spectral data is unfortunate.
Will your app allow exporting of the raw spectral data? I have been using the Hopoocolor Windows program then exporting the data so I can then import it in ColorCalculator. Using my phone to take measurements then copying the data to my PC would be much more convenient.
Absolutely, it is important to be able to revisit that raw data when newer algorithms, consumers, programs, or corrections need to be used. Like camera raw vs jpg.
At bare minimum I will export raw sensor data as csv file (nm vs read spectra), but will gather feedback on which format to support (SpecWin / SpectraSuite / etc) in the future to create IES TM-30 reports, etc in external software of your choice (ArgyllCMS, etc)
as7343 not necessarily brings better results for metrics like CRI. seems it embedded XYZ calibration result inside their chip or the chip just outputs XYZ directly(no matrix operation).
feeling exhausted these days, communicating with you guys is utterly my personal thing, has nothing to do with the company I am staying at. I must emphasize multiple times, communicating with you guys is totallyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy my personal behavior.I also got some feedback from domestic users, but seems there is no dedicated forum like BLF, some resellers did testing for me, they also gave positive feedback.
I regret not checking online forum reviews before I ordered LM4. I have a LM3, which works fairly good when I tested it with some reference and compared to a borrowed X-Rite, considering its price. However, I want to drop all mirco-USB cables, so I decided to upgrade to LM4, and it arrived me last week. However, it’s a huge off. I simply measured the sun light. LM4 fails to give a correct Ra of sun light 100, way off, while LM3 is good.
