Adding Matter-over-Thread device from an existing Apple Home network | Home Assistant | Page 1

tender sentinel Nov 4, 2025, 6:21 PM

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Hey, I'm trying to connect Eve Energy devices to my HASS instance. They are currently connected to Apple Home network.

I did it before for a few other devices (also Eve Energy, but not only) with success, but there's a problem I come across with two of those. The error message is basically the same for both:

2025-11-04 18:10:28.070 (MainThread) INFO [matter_server.server.device_controller] Starting Matter commissioning with code using Node ID 40.
2025-11-04 18:10:28.618 (Dummy-2) INFO [chip.ChipDeviceCtrl] Established secure session with Device
2025-11-04 18:10:31.193 (Dummy-2) CHIP_ERROR [chip.native.CTL] Error on commissioning step 'SendNOC': 'src/controller/CHIPDeviceController.cpp:1718: CHIP Error 0x0000007E: Trying to add a NOC for a fabric that already exists'
2025-11-04 18:10:31.346 (Dummy-2) CHIP_ERROR [chip.native.EM] Failed to send Solitary ack for MessageCounter:116957240 on exchange 1699i with Node: <0000000000000000, 0>:src/messaging/ExchangeContext.cpp:99: CHIP Error 0x00000002: Connection aborted
2025-11-04 18:10:31.347 (Dummy-2) WARNING [chip.ChipDeviceCtrl] Failed to commission: src/controller/CHIPDeviceController.cpp:1718: CHIP Error 0x0000007E: Trying to add a NOC for a fabric that already exists
2025-11-04 18:10:31.347 (MainThread) ERROR [matter_server.server.client_handler] [547030720032] Error while handling: commission_with_code: Commission with code failed for node 40.

Googling shows that Trying to add a NOC for a fabric that already exists may mean that I already have that device added to my HASS, but if by any chance I do, I cannot find it anywhere.

Is there anything I can do to fix this issue without factory resetting those devices?

tender sentinel Nov 5, 2025, 12:23 PM

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Adding Matter-over-Thread device from an existing Apple Home network

viral geyser Nov 5, 2025, 8:10 PM

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in apple device page find connected services, remove home assistant

tender sentinel Nov 6, 2025, 10:31 AM

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viral geyser in apple device page find connected services, remove home assistant

Won’t that mean I’ll need to reconnect all of the devices that are tied to that service?

viral geyser Nov 6, 2025, 10:31 AM

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only HA

tender sentinel Nov 6, 2025, 10:33 AM

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That’s what I meant… if that’s the only way then factory resetting that smart plug will be less work. Thanks nonetheless!

viral geyser Nov 6, 2025, 10:35 AM

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Its irrelevant to reset, you just remove it from a dead fabric; it will stay connected to other fabric and thread network

tender sentinel Nov 6, 2025, 10:36 AM

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Yeah, but I already have 10 other devices connected that way. Readding all of them back to HASS will take me forever. Hm, so factory resetting won’t help and basically repairing every device is the only way for me?

viral geyser Nov 6, 2025, 10:38 AM

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What’s your initial question? Thought you just had issue with this unit only

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Sharing device in batch is a thing in Matter (joint-fabric) but no ecosystem supports this at the moment

tender sentinel Nov 6, 2025, 10:41 AM

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Ah! I get it now. I thought you wanted me to remove the HASS service completely from Apple Home, not just removing the service from a single device. Sorry, I must’ve misread

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I found the setting you meant and I’ll try again, thanks a lot

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It worked, amazing

#Adding Matter-over-Thread device from an existing Apple Home network