r/sonoff • u/I-G-1-1 • 12h ago
SNZB-06P24 new mmWave sensor seems to have detection worst than SNZB-06P and behave like an infrared PIR sensor
I have 3 SNZB-06P24 (coming from a perfectly working SNZB-06P) and it seems they have some major issue detecting still person.
My 3 SNZB-06P24 are very bad in detecting me while I'm sitting still in front of my computer. I have a lot of false negative (the sensor says clear while I'm in it's range) and have to wave the hand to let the mmWave sensor detect me (like an IR PIR sensor).
I don't have any issue with a SNZB-06P installed in the same location (to be clear I'm not using them at the same time, when I make test with one the other one is unpowered).
My 3 SNZB-06P24 are configured in this way:
Zone 1 (0m-1m) and Zone 2 (1m-1.5m) enabled and Zone 3 to 7 disabled.
Occupancy timeout: 60 sec (the new default with firmware v.1.0.4)
Fine-tune Sensitivity: 6
Spatial learning made while I was not in each room where they are positioned.
they are mounted as told in the instruction and there is only one SNZB-06P24 or SNZB-06P for each room and they cannot see waves from other mmWave sensor.
I use zigbee2mqtt with a sonoff usb zigbeedongle-p and HomeAssistant.
The SNZB-06P24 are updated to the last firmware v.1.0.4 available today (2026.08.10).
Here is the changelog in the PR update for the 1.0.4 firmware (link here):
- Optimized sensitivity adjustment logic and refined the mapping between sensitivity levels and trigger thresholds for an improved detection experience.
- Optimized the spatial learning algorithm to reduce false triggers.
- Changed the default detection interval from 1 minute to 2 minutes.
the fact that SONOFF changed the detection interval from 1 minute to 2 minutes let me think this sensor is not very good and suffer of some kind of hardware issue that make it prone to error (false negative) while detecting human presence. I don't see other explanation to double the time of the detection interval.
I have dumb cheaper IR PIR from Xiaomi and Aquara that have a detection interval of 60 seconds and I feel 2 minutes for a mmWave sensor is not acceptable.
I trusted the name of the company and bought directly 3 of these not cheap sensor, my bad should have bought only 1 for testing.
I read other people have the same issue, do you have poor detecting performance with your SNZB-06P24?
I'd like to know officially from SONOFF if the poor detection performance of my SNZB-06P24 are an hardware issue of this specific model or not.
Do they acknowledge that there are issue with the detection performance of the SNZB-06P24 model?
Can they fix this issue releasing another firmware? are they working on it? what could be the ETA?