# Aeotec Multisensor 6 - Strange minus readings on Luminence and UV **URL:** \ **Category:** Questions & Help\ **Created:** [November 8, 2021, 11:41am UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486 "2021-11-08T11:41:23Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![jumpingjimmyfaz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jumpingjimmyfaz/32/34823_2.png) [@jumpingjimmyfaz](https://community.homey.app/u/jumpingjimmyfaz)\ **Post date:** [November 8, 2021, 11:41am UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/1 "2021-11-08T11:41:23Z")
Hi All, I currently have two of four Aeotec Multisensor 6 units which are showing very strange readings such as -32,768 luminance and -1 UV despite being in sunlight or lit rooms. The sensors are located close the Homey and similar distances to the two working sensors (appear to be correct readings). I have tried to remove the device and re-add, however, this has made no difference. Is anyone able to help? Are the sensor units dudd? Thank you in advance and I look forward to hearing from you. ---
**Author:** ![DirkG](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkg/32/118897_2.png) [@DirkG](https://community.homey.app/u/DirkG)\ **Post date:** [November 8, 2021, 1:43pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/2 "2021-11-08T13:43:07Z")
Are the MS 6 battery powered or by USB? If they powered by battery I would change the batteries first. Otherwise I would suggest to contact [Aeotec](https://aeotec.com/support/), because it’s probably not a range/connection problem. ---
**Author:** ![jumpingjimmyfaz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jumpingjimmyfaz/32/34823_2.png) [@jumpingjimmyfaz](https://community.homey.app/u/jumpingjimmyfaz)\ **Post date:** [November 8, 2021, 2:31pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/3 "2021-11-08T14:31:15Z")
Thank you Fantross! They are all POE-USB powered. I am unsure why only two are showing odd readings. ---
**Author:** ![HarmJ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/harmj/32/9835_2.png) [@HarmJ](https://community.homey.app/u/HarmJ)\ **Post date:** [November 8, 2021, 2:45pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/4 "2021-11-08T14:45:31Z")
I have 3 as well. Both 3 never update the UV parameter. Maybe there is an issue in updating values? 2 are directly usb powered and 1 usb poe powered. ---
**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\ **Post date:** [November 8, 2021, 3:22pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/5 "2021-11-08T15:22:39Z")
> [@jumpingjimmyfaz](#): > > tried to remove the device and re-add, And you did that VERY close to Homey? ( \< 10 cm ) ---
**Author:** ![jumpingjimmyfaz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jumpingjimmyfaz/32/34823_2.png) [@jumpingjimmyfaz](https://community.homey.app/u/jumpingjimmyfaz)\ **Post date:** [November 8, 2021, 3:35pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/6 "2021-11-08T15:35:20Z")
Thank you for your replies. I removed and re-added within 1.5 to 2 metres of the Homey hub. I can try again tonight, but I suspect this will not make a difference. ---
**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\ **Post date:** [November 8, 2021, 5:22pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/7 "2021-11-08T17:22:38Z")
[https://support.athom.com/hc/en-us/articles/360012182213-Extending-the-Z-Wave-range-of-Homey](https://support.athom.com/hc/en-us/articles/360012182213-Extending-the-Z-Wave-range-of-Homey) ### **Limited range during pairing** Warning: While pairing, a signal cannot ‘hop’ across the network. Also, for security measures, some devices pair in a special low-powered mode. This makes the range of that Z-Wave device temporarily small, to prevent malicious actions. Always pair Z-Wave devices close to Homey, then place them in the right place. Within 30 minutes, the new network routes will be automatically established, and the device will become active. ---
**Author:** ![Jan\_Privat](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jan_privat/32/35236_2.png) [@Jan\_Privat](https://community.homey.app/u/Jan_Privat)\ **Post date:** [November 9, 2021, 10:46am UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/8 "2021-11-09T10:46:37Z")
Have you checked the settings of that device? Maybe the are set to “Ultraviolet Threshold = 0”, which means they send no UV reports at all. ---
**Author:** ![jumpingjimmyfaz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jumpingjimmyfaz/32/34823_2.png) [@jumpingjimmyfaz](https://community.homey.app/u/jumpingjimmyfaz)\ **Post date:** [November 9, 2021, 11:03am UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/9 "2021-11-09T11:03:04Z")
Thank you for your posts. I did not have the chance to check last night. But will do this evening. UV Threshold is set to 2. Luminance threshold is set to 2 and Temperature is set to 2. Temperature readings appear correct. Only the UV and Luminance are the issue. I will remove the device tonight and add again in close proximity to the Homey Hub. Hope this will work. ---
**Author:** ![HarmJ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/harmj/32/9835_2.png) [@HarmJ](https://community.homey.app/u/HarmJ)\ **Post date:** [November 9, 2021, 11:10am UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/10 "2021-11-09T11:10:43Z")
Jan tnx! Settings is on the default 2 😉 so that couldnt be the issue ---
**Author:** ![Hsd1965](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/hsd1965/32/30160_2.png) [@Hsd1965](https://community.homey.app/u/Hsd1965)\ **Post date:** [November 9, 2021, 2:53pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/11 "2021-11-09T14:53:20Z")
Do you have the latest firmware V1.15 installed on this multisensor device? From the release notes for that firmware: **V1.15 Changelogs:** \*\*\* Fixes Light Sensor reporting abnormal values on occasion\*\* This firmware was released 28 september 2021 I did not install it because mine is reporting UV correctly. ---
**Author:** ![jumpingjimmyfaz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jumpingjimmyfaz/32/34823_2.png) [@jumpingjimmyfaz](https://community.homey.app/u/jumpingjimmyfaz)\ **Post date:** [November 9, 2021, 3:35pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/12 "2021-11-09T15:35:03Z")
How do you install a new firmware from Homey? ---
**Author:** ![HarmJ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/harmj/32/9835_2.png) [@HarmJ](https://community.homey.app/u/HarmJ)\ **Post date:** [November 9, 2021, 4:07pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/13 "2021-11-09T16:07:10Z")
> **[Aeotec MultiSensor 6 firmware upgrade](https://aeotec.freshdesk.com/support/solutions/articles/6000036562-how-to-update-multisensor-6-z-wave-firmware-)** > > This page presents download files and installation instructions to update your Multisensor 6 via OTA software and form part of the larger Multisensor 6 user guide. Update Multisensor 6 firmware via HomeSeer. Our guide to upgrading Mu... Just updated the software. Now wait for daylight. I will give you an update. Only problem now is that it seems to not include anymore in as secure. ---
**Author:** ![HarmJ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/harmj/32/9835_2.png) [@HarmJ](https://community.homey.app/u/HarmJ)\ **Post date:** [November 10, 2021, 11:17am UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/14 "2021-11-10T11:17:35Z")
Still no update on UV with latest firmware ![Snag_bd25d0](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/1/e/1eef4966af3ed6943456b7b05cd31ba5bfe95237.png) ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [November 10, 2021, 12:26pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/15 "2021-11-10T12:26:54Z")
Judging the lux value, that sensor is inside, inside is a terrible place to measure UV as there is hardly any of it inside even if you would place it in the sun behind the window. ---
**Author:** ![DirkG](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkg/32/118897_2.png) [@DirkG](https://community.homey.app/u/DirkG)\ **Post date:** [November 10, 2021, 12:38pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/16 "2021-11-10T12:38:36Z")
You’re absolutely right, but it doesn’t explain the strange values mentioned in the first post: > [@jumpingjimmyfaz](#): > > I currently have two of four Aeotec Multisensor 6 units which are showing very strange readings such as -32,768 luminance and -1 UV despite being in sunlight or lit rooms. 0 UV inside the house is absolutely ok, but -1 UV? ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [November 10, 2021, 12:43pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/17 "2021-11-10T12:43:04Z")
Black hole nearby? ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [November 10, 2021, 1:04pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/18 "2021-11-10T13:04:43Z")
Yes, -1 could be possible, depending on how the UVi (UV index) is calculated, as it is just a calculation of an analog value (that starts at 1 volts or something like that). and -32768 as value means “invalid value”, still not very explanatory, but that’s all there is to it. It could be just a badly iniated sensor, or bad firmware, but hard to say. You could of course ask the developer of the devices and app (Aeotec) themselves, they probably can say more. ---
**Author:** ![DirkG](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkg/32/118897_2.png) [@DirkG](https://community.homey.app/u/DirkG)\ **Post date:** [November 10, 2021, 1:28pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/19 "2021-11-10T13:28:39Z")
> [@Caseda](#): > > You could of course ask the developer of the devices and app (Aeotec) themselves, they probably can say more. This was my suggestion in my first [post](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/2)… 😉 ---
**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\ **Post date:** [November 10, 2021, 2:49pm UTC](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486/20 "2021-11-10T14:49:21Z")
> [@DirkG](#): > > absolutely right, but it doesn’t explain the strange values That strange value is not visible anymore, probably because @HarmJ re-added the device very close to Homey. ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/e/7/e7e79017a525e1f1d80c8e5649d9326c1aea5b28.png) [Next page](https://community.homey.app/t/aeotec-multisensor-6-strange-minus-readings-on-luminence-and-uv/54486.md?page=2)