# Arduino Matter thread board adding to Homey **URL:** \ **Category:** Developers\ **Tags:** homey-pro, matter\ **Created:** [May 31, 2024, 9:30pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805 "2024-05-31T21:30:38Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Trebbit](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/trebbit/32/81523_2.png) [@Trebbit](https://community.homey.app/u/Trebbit)\ **Post date:** [May 31, 2024, 9:30pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/1 "2024-05-31T21:30:38Z")
I recently bought a silicon dev20270 board which I hoped I could connect to my homey pro using Matter. After uploading the first code on the board and trying to connect the board I got a message the device cannot be added because it is not certified. Does someone know a way to add uncertified devices(which I made myself) so I can play around with it. I know there are apps which allow you adding your Arduino boards using wifi but would like to use Matter if possible. Also not sure if you could maybe add those devices if you would make a app? So if someone has any idea if and how it’s possible let me know. Thanks ---
**Author:** ![rcaceiro](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rcaceiro/32/79267_2.png) [@rcaceiro](https://community.homey.app/u/rcaceiro)\ **Post date:** [July 1, 2024, 10:21am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/2 "2024-07-01T10:21:46Z")
Hi @Trebbit, Contact support to pressure them, I have the same problem now ---
**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:** [July 1, 2024, 11:07am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/3 "2024-07-01T11:07:10Z")
> [@Expose Home Assistant Entities as Matter Devices](https://community.homey.app/t/expose-home-assistant-entities-as-matter-devices/111617/3): > > I also ran into this issue a while ago when I was trying to implement a custom matter bridge. I reported this to Homey and their reply was basically “we are not sure yet if we are going to allow this”. I would suggest to open a support ticket yourself as well just so they see that there is demand for this feature. EDIT: Full response I got back in April: It is indeed not possible to add uncertified Matter devices. This is because the devices are not tested and we cannot be sure that this won’… ---
**Author:** ![rcaceiro](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rcaceiro/32/79267_2.png) [@rcaceiro](https://community.homey.app/u/rcaceiro)\ **Post date:** [July 1, 2024, 11:19am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/4 "2024-07-01T11:19:23Z")
@robertklep I’ve done that ---
**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:** [July 1, 2024, 11:21am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/5 "2024-07-01T11:21:05Z")
Read the response. They’re basically saying “no, we’re not going to support uncertified devices”. You can tell Athom that Home Assistant and even Apple have no issues with uncertified Matter devices. ---
**Author:** ![staeff](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/staeff/32/79712_2.png) [@staeff](https://community.homey.app/u/staeff)\ **Post date:** [July 1, 2024, 11:21am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/6 "2024-07-01T11:21:34Z")
Let us know what they respond, would be interesting to see if their stance on this has changed in any way. ---
**Author:** ![rcaceiro](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rcaceiro/32/79267_2.png) [@rcaceiro](https://community.homey.app/u/rcaceiro)\ **Post date:** [July 1, 2024, 11:33am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/7 "2024-07-01T11:33:40Z")
I am waiting for their response yet… I’ve said that homekit and Google home support uncertified devices To be honest I bought homey to have more freedom than homekit so let’s see ---
**Author:** ![rcaceiro](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rcaceiro/32/79267_2.png) [@rcaceiro](https://community.homey.app/u/rcaceiro)\ **Post date:** [July 1, 2024, 3:38pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/8 "2024-07-01T15:38:00Z")
Ok they told me that this feature are not supported yet but perhaps could be available in the future, so progress I guess? ---
**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:** [July 1, 2024, 3:42pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/9 "2024-07-01T15:42:11Z")
That’s the same answer they gave @staeff months ago 🤷🏼‍♂️ ---
**Author:** ![Austin\_Skillings](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/austin_skillings/32/113688_2.png) [@Austin\_Skillings](https://community.homey.app/u/Austin_Skillings)\ **Post date:** [January 31, 2025, 8:16pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/10 "2025-01-31T20:16:29Z")
I also bought a Arduino nano with thread. It will need a thread border router. Are you saying the homey pro won’t be able to connect to this once I put it together? What is the point of it being a thread border router? Shoot. Is there a way to get another thread border router and then connect it to homey pro as a hub? Could that be a workaround? ---
**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:** [February 1, 2025, 6:20am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/11 "2025-02-01T06:20:18Z")
Assuming that you’re using Matter over Thread: no, that won’t be a solution. Homey will not pair with uncertified Matter devices. ---
**Author:** ![staeff](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/staeff/32/79712_2.png) [@staeff](https://community.homey.app/u/staeff)\ **Post date:** [February 1, 2025, 1:38pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/12 "2025-02-01T13:38:53Z")
I would suggest opening a ticket, that Homey should allow uncertified devices. I think this is something that will only change if they see that there is enough demand by the customers. ---
**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:** [February 1, 2025, 1:51pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/13 "2025-02-01T13:51:46Z")
For whatever reason, Athom went a different route with Matter than they did for Zigbee and Z-Wave: instead of allowing apps to implement support for devices, everything related to Matter is handled by Homey’s core. This resulted in the Matter limitations that Homey has, like not accepting uncertified devices, and not supporting certain non-standard, yet much-used, clusters (for instance related to energy reporting). I guess the main reason for this is to limit support requests for unsupported devices, now they can just tell everyone that “your device isn’t certified, too bad”, thereby limiting Homey’s Matter implementation even more. Another reason could be that more flexible Matter support apparently isn’t a priority for LG’s own Homey, and most work that Athom is doing on Matter seems to be in support of that device (just look at the new device types that were added to Homey’s Matter implementation, all are devices that LG makes themselves). ---
**Author:** ![staeff](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/staeff/32/79712_2.png) [@staeff](https://community.homey.app/u/staeff)\ **Post date:** [February 1, 2025, 2:06pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/14 "2025-02-01T14:06:35Z")
I mean I get all that but I’m not even asking for custom clusters, just to allow uncertified Matter devices in a similar way that even Apple allows you to add them. And if they just add it as one of their “experiments” settings then so be it. ---
**Author:** ![Austin\_Skillings](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/austin_skillings/32/113688_2.png) [@Austin\_Skillings](https://community.homey.app/u/Austin_Skillings)\ **Post date:** [February 1, 2025, 3:09pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/15 "2025-02-01T15:09:24Z")
Yeah I agree. If only you can add to an apple bridge then add apple to homey or something. ---
**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:** [February 1, 2025, 3:27pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/16 "2025-02-01T15:27:08Z")
> [@Austin\_Skillings](#): > > If only you can add to an apple bridge then add apple to homey or something. That’s already possible, but devices between the Apple border router and Homey are still shared over Matter, and Homey will still refuse to pair uncertified devices that way. ---
**Author:** ![Austin\_Skillings](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/austin_skillings/32/113688_2.png) [@Austin\_Skillings](https://community.homey.app/u/Austin_Skillings)\ **Post date:** [February 3, 2025, 7:07am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/17 "2025-02-03T07:07:39Z")
Does this still happen if I did zigbee instead? ---
**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:** [February 3, 2025, 7:34am UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/18 "2025-02-03T07:34:13Z")
No, but for Zigbee you’ll need to write a specific app before your device is supported (unless it poses as a simple light or switch). ---
**Author:** ![Austin\_Skillings](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/austin_skillings/32/113688_2.png) [@Austin\_Skillings](https://community.homey.app/u/Austin_Skillings)\ **Post date:** [February 16, 2025, 3:20pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/19 "2025-02-16T15:20:06Z")
Does a simple light simply mean on and off. Or does it do dimming or colors as well? ---
**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:** [February 16, 2025, 3:33pm UTC](https://community.homey.app/t/arduino-matter-thread-board-adding-to-homey/110805/20 "2025-02-16T15:33:11Z")
Not sure about colors, but dimming should be supported.