They should work, according to
How far are they located from your dongle ? Is your dongle connected using an USB extension cable ?
Might be interference or lack of Zigbee Router devices in network mesh to achive the needed range and coverage, see → Zigbee networks: how to guide for avoiding interference and optimize for getting better range + coverage
Francis, thanks for your feedback. The dongle is plugged directly on the USB port on the khadas board. and I had the sensor located at less than 3 meters of the dongle.
Anyway , after performing a second, then a third pairing, I have finally both sensors reporting temperature changes !
@Hedda: Thanks for the feedback and providing the link to your great Zigbee interference guide !
The malfunctioning devices were less than 2 meters from the Zigbee dongle, so it could not be a range issue.
As mentionned earlier, I finally managed to get the devices reporting the temperature, however one is still not reporting the humidity …
I am quite puzzled with a mention in the guide:
While both ZHA and Zigbee2MQTT do support older Zigbee Coordinator adapters based on the old Texas Instruments CC253x (CC2530 and CC2531) they are not recommended any longer, so spare yourself the potential grief and instead just buy a newer Zigbee Coordinator adapter from the start.
I have bought quite recently the Sonoff Zigbee 3.0 USB Dongle Plus , and yet HA indicates the coordinator to be Texas Instrument CC253x ??? (see screen copy below.)
Do you think I get an outdated firmware on this Dongle ? Should I try to upgrade the firmware ?
Regards
The Sonoff Zigbee 3.0 USB Dongle Plus is a CC2652p, not a CC253x
Such pairing issues symtom are common when have interference and usually due not using a USB extension cable to get it away from the computer and other devices + make sure connecting it to a USB 2.0 port and not to a USB 3.0. Read and try to follow the linked guide, it mentions this several times and even has a video showing an example of how the radio adapter behaves when too close to the board.
That only refers to ZHA integration using the same TI Z-Stack serial protocol interface to communicate with those (it is also the same zigpy radio library for all Texas Instruments based adapters), read the ZHA integration documentation, it mentions this and refer to CC26x2 which includes newer CC2652 radios such as your specific adapter uses. Check out: ITead's "Sonoff Zigbee 3.0 USB Dongle Plus" (model "ZBDongle-P") based on Texas Instruments CC2652P +20dBm radio SoC/MCU
For me SNZB-02D also does not update. I paired several times. Removed battery for some time.
Once the humidity did frequent updates. All the other times only the initial value was reported for temperature and humidity.
Is there an easy solution?
Are you using an extension cable?
Yes I do use an USB extension, and I use many zigbee devices without any problems. For one test I moved the sensor directly near the ConBee II Stick. Didn’t help anything.
Any updates regarding solving this issue? Same happened to me just today as stated in first post, snzb-02d connected via sonoff dongle without usb cable extension and worked for weeks perfectly.
Update:
After going into sensor settings and disabling and enabling humidity as well as temperature entity, sensor started to report changes instantly just as it used to be.
Hope that did the trick for good.
Note: I performed the update 2024.9.1 during the day, but noticed the issue at the end of the day. So I hope it was related to the update.
1 Like
Hi,
I have the same problem with all my 9 SNZB-02D temperature devices since yesterday. Previously they had reported the values perfectly and since yesterday the temperature is no longer updated, only when HA is restarted or at some random time that I can’t explain. The ConBee2 is 2m away from all the electrical appliances and directly located next to one of the temperature sensors. Also, I have 7 Zigbee bulbs (E27) and 6 Nous A1Z smart plugs spread throughout the flat, so I can’t imagine it’s a signal issue. I think it would have had to work with at least one of the sensors during the tests.
Could it be due to the core update 2024.10.1 that I installed yesterday? At least the timing would fit. And how many Zigbee devices can a ConBee2 actually manage?
Update: temperature is reported every hour now (all 9 SNZB-02D), but humidity is reported immediately after state change.
Here is one example from august 2024:
and here the same sensor yesterday:
You can see that there is no update earlier than one hour later.
Some day something must have happened…
Best regards
Rado
1 Like
Hi,
How are you disabling these entitities ? in HA or at the device level ? I tried in HA configuration and it is still stuck at the same temperature in HA whereas the displayed one is evolving
thanks
any idea why the SNZB 02D is not reporting - it seems to me it is some bad firmware. i just want the device to send TEMP and HUMIDITY every minute. Which it does not. there is obviously to tweak to fix that.
the SNZB 02 does this - sending both values every x minutes. regardless if there is a change or not.
blue+red=02D
green= 02
yellow= LYWSD03MMC-z
conclusio: as sonoff known how to do this, the firmware is crap!
i dont need a display device with zigbee when zigbee doesnt work properly. i rather go with a dumb device for a third the price. 
Some sensors only push a change when the current reading is x% more than the previous reading.
Some ZigBee integrations like Z2M let you configure a reporting interval on the measurement clusters which should make reporting more frequent.
Conclusion: It might be time to introduce a hammer to your SNZB 02D. Make sure both devices get really intimate with each other 
1 Like
Same issue here. there is clearly some incompatibilities with these devices. The displayed temperature is evolving (many d°), the RSSI/LSQ is green, but there is no update in HA.
I am close to use a hammer on them 
and buy another model as I use them to drive a fan to regulate the temperature in my cellar.
Don’t mess with my wine
Same here, reporting only initial value on 2023.10.5 HA version, on a newly bought snzb-02d. So your recent updates are not why it is not working, it is just crap equipment.
i bought a number of snzb-02 on black friday deal as they were a really good price… i already have 4 Aqara Temp/Humidity sensors and they work great but i couldnt get data from the sonoff devices, so boxed them up and requested a return with amazon and just purchased 3 more aqara Temp sensors isntead as i know they work great.
I have one since february, that one works normally ever since.
Recently bought two more, but these do not report data normally.
one of the new sensors and the old one are next to each other, one reports data as it changes, the other only reports rarely, and inaccurately
the model and the fw-version is the same for all (at least as reported by zb2mqtt)
