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The original was posted on /r/homeassistant by /u/2442929161 on 2026-02-11 06:14:22+00:00.
Hi everyone,
I’m a developer from Shenzhen Heiman. I’ve been developing Matter since 2022, at that time, The Alliance was conducting test events, The Alliance conducted nine test events and two final Specification Validation Event (SVE) prior to the launch of Matter. and two final Specification Validation Event (SVE) prior to the launch of Matter.
I am wondering how you have been feeling about the stability and overall experience of Matter over Thread. I’ve received feedback regarding several different issues; the major one being that users are often unable to commission, pair, or onboard their devices. Others are encountering "unresponsive" or "unavailable" status errors.
I’m not sure if most of you are facing these same hurdles. Have you run into any issues with Matter over Thread devices lately—for example, with the recent IKEA Matter series? How has your experience been with these brands? Let’s discuss it here."
I’ve been testing Matter over Thread devices for years, including our own Heiman Matter products. To start this topic, I’d like to share some of my experiences and test results below, I am also very curious to hear: what do your Matter setups look like?"
Test Setup 1: Apple Home Only.
- Matter Hubs: Apple HomePod Mini, HomePod (2nd Gen), Apple TV 4K.
- Matter Devices: Heiman Motion sensor(M1-M), Heiman Smoke Sensor(S1-M, HS1SA-M, S1-TM), Heiman Co Sensor(C1-M, HS720ES-M, HS725ES-M), Heiman temperature & humidity sensor(H1-M), Heiman Door Sensor(D1-M) and Heiman Water Leakage Sensor(L1-M).
- Version: Hubs are running HomePod Software 26; iPhone 15 Pro Max is on iOS 18.5.
- Result: We commissioned 25 battery-powered devices with no issues. However, when we increased the count to 50, devices began going offline due to high network traffic (congestion), especially during active commissioning.
- Recommendation: For larger setups, adding Full Thread Device (FTD) routers (mains-powered Matter devices) is highly recommended to improve system robustness.
- Known Issue: Apple Home currently does not support the Self-Test feature for Smoke and CO alarms.
Test Setup 2: Google Home Only.
- Matter Hubs: Google Nest Hub (Gen 2), Google TV Streamer 4K.
- Matter Devices: Heiman Motion sensor(M1-M), Heiman Smoke Sensor(S1-M, HS1SA-M, S1-TM), Heiman Co Sensor(C1-M, HS720ES-M, HS725ES-M), Heiman temperature & humidity sensor(H1-M), Heiman Door Sensor(D1-M) and Heiman Water Leakage Sensor(L1-M).
- Result: 25 devices commissioned successfully with no issues. We did not add more "Sleepy End Devices" (SEDs) here, as we recommend adding FTD routers to the mesh first to ensure stability.
- Known Issues (Pending Google Fix): 1. Battery status always shows as "Unavailable" for Smoke and CO alarms. 2. Hardware status always shows as "Unavailable" for Smoke and CO alarms.
Test Setups 3 & 4: SmartThings / Homey Pro Only.
- Matter Hubs: SmartThings Hub v3 / Homey Pro.
- Matter Devices: Full range including M1-M, S1-M, S1-TM, C1-M, HS1SA-M, HS720ES-M, HS725ES-M, H1-M, L1-M and D1-M.
- Result: 25 devices commissioned with no issues. As with other platforms, we recommend adding FTD routers if you plan to expand the number of battery-powered sensors.
Test Setup 5: Home Assistant (HAOS) Only
- Matter Hub: Home Assistant Green/ Heiman thread dongle.
- Matter Devices: Full range including M1-M, S1-M, S1-TM, C1-M, HS1SA-M, HS720ES-M, HS725ES-M, H1-M, L1-M and D1-M.
- Result: 48 devices commissioned (mixture of battery and AC-powered). We use this daily for automations with great success.
- Observation: Without an FTD router in the system, we noticed very brief "drop-offs" or latency. Adding a Matter-compatible Thread router is highly recommended.
Test Setups 6–9: Multi-Admin (Mixed Ecosystems)
- Setups: Apple + HA, Google + HA, Homey + HA, SmartThings + HA.
- Matter Devices: Full range including M1-M, S1-M, S1-TM, C1-M, HS1SA-M, HS720ES-M, HS725ES-M, H1-M, L1-M and D1-M.
- Result: We tested 15 to 20 devices in these multi-admin configurations. All worked without issue. We still suggest FTD routers for any network with many sleepy devices.
Developer Tips for Matter over Thread:
- OTA Updates: We found that SmartThings, Google Home, and Home Assistant currently handle OTA (Over-the-Air) firmware updates most easily.
- Firmware Version: For Heiman Matter devices, we highly recommend using Version 1.5.
- Mesh Robustness: Always include at least one or two Full Thread Devices (FTDs)—like a smart plug or light switch—to act as routers for your battery-powered sensors.
- Wireless Interference: Check your Wi-Fi channel against your Thread (802.15.4) channel. Ensure they do not overlap to prevent signal interference, Thread and Wi-Fi both use the 2.4 GHz frequency. For the most stable connection, manually set your Wi-Fi to Channel 1. This stays far away from Thread Channel 25, which many Matter hubs (like Apple’s) use by default and cannot change.
- Network Unity: When using multiple hubs, ensure they are all on the same Local Area Network (LAN).
- Border Router Support: Ensure your chosen hub officially supports OTBR (OpenThread Border Router) functionality.
- Troubleshooting Unavailable: If a device drops off, try moving it closer to the hub or a router to check for range issues.
- IPv6 Configuration: Double-check your router's IPv6 configuration, as it is critical for Matter over Thread stability, Ensure your Wi-Fi router has mDNS or Multicast enabled. Matter uses these to "find" devices on your network. If your router blocks multicast, your devices will show as "Unavailable" even if the Thread signal is strong.
what do your Matter setups look like? please leave comments below.