#Bought a Sonoff Zigbee Dongle and some SNZB-02P's but they report very infrequent

1 messages · Page 1 of 1 (latest)

weak swan
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Hi, I wanted to try out Zigbee for my temp/humidity sensors. My use case requires the sensors to report as frequent as possible (to quickly trigger actions without much delay), apparently the SONOFF SNZB-02P's do that - at least thats what the vendor says in its article description. The problem is, in my setup they report only every 15-30 minutes.

My setup is:

  • Raspberry Pi 4 4GB
  • Sonoff Zigbee 3.0 USB Dongle Plus
  • 2x Sonoff SNZB-02P

Sensors are laying right next to the dongle (5 cm) and I also tried repairing for a few times, with no luck. With the ZHA Toolkit I tried to zha_toolkit.execute but I receive NO_ROUTE errors:

2025-06-23 07:59:38.225 ERROR (MainThread) [custom_components.zha_toolkit.scan_device] Couldn't read 0x0402/0xfffe: Failed to send request: <Status.NWK_NO_ROUTE: 205>
2025-06-23 07:59:45.252 ERROR (MainThread) [custom_components.zha_toolkit.scan_device] Failed 'discover_attributes_extended' starting 0x0402/0x0000. Error: Failed to send request: <Status.NWK_NO_ROUTE: 205>
2025-06-23 07:59:52.699 ERROR (MainThread) [custom_components.zha_toolkit.scan_device] Failed to discover 0x0402 commands starting 0. Error: Failed to send request: <Status.NWK_NO_ROUTE: 205>
2025-06-23 07:59:59.868 ERROR (MainThread) [custom_components.zha_toolkit.scan_device] Failed 'discover_attributes_extended' starting 0x0402/0x0000. Error: Failed to send request: <Status.NWK_NO_ROUTE: 205>

Can someone help me troubleshoot this or maybe even knows what is causing this?

Bildschirmfoto_2025-06-23_um_08.05.56.png Bildschirmfoto_2025-06-23_um_08.05.49.png Bildschirmfoto_2025-06-23_um_08.05.38.png Bildschirmfoto_2025-06-23_um_08.05.23.png
weak swan
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Anyone has an idea or is this the wrong channel?

ripe swan
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Can you select in your temperature sensors the time between updates? I use some BT sensors and I can select the time interval. This is interesting in my case to not drain the battery. If your sensors are battery powered, it's probably something to configure. I think 30 minutes is OK if is not for some critical use. Can you tell the brand and model of the sensors?

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Sorry, you put the model 😅

deft apex
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No experience with the SNZB-02P, but most Zigbee temperature sensors don't report often if temperature is stable, but do update quick when there is a significant change. And looking at the graph I would say that's the case here as well.

weak swan
ripe swan
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In Amazon, it tells that the sensor reports in 5 seconds if there is some change

weak swan
weak swan
deft apex
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@weak swan But what in the graph makes you say that? As I do see changes of 0.1 degree and 1% reported just fine. And I don't expect a higher resolution.

ripe swan
# weak swan Yes, thats exactly why I bought it in first place :/

I use some old Xiaomi sensor with modified firmware, via BT, and you can select the interval of updating. You need to tinker and buy the programmer, but I have then for several months and are reliable for what I use them for. I measure the temperature and humidity in every room and outside my window. All OK until now. And it works directly with the RPi 4.

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Looking at the pics I agree with @deft apex ,seems to work Ok

weak swan
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Hmm, you guys might be right... But shouldn't this be reported quicklier? It's a difference of 0.5 degree over ~13 minutes

ripe swan
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What kind of temperature are you controlling? Think that such range change might be an open window or even a person passing through, I don't know 😅

elfin mountain
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If it were to report much more frequently you'd end up having to switch batteries once a week.
If you want fast updates you should consider buying into wired sensors (like stuff that is esphome compatible)

weak swan
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Gotcha, I'll look into wired senors!

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Thanks everyone :)

ripe swan
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Totally agree. I use a Switchbot CO2 and temperature detector that reports in different intervals whether is powered by USB or by AA batteries

deft apex