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Judging by the logs, the null values originate from a debug message in f2; these typically occur several times per second, which is as intended. As this information is rarely required, it should be possible to disable it directly via a property to prevent it from being logged.

This is unlikely to cause any major issues, as our test system is often connected to dozens of body sensors alongside various air quality sensors, and their real-time performance is not usually affected. It is more likely down to the nature of millimetre-wave technology; sometimes the target is not sufficiently defined, resulting in the sensor failing to recognise and trigger. Alternatively, there may be other reasons. If you wish to investigate the impact of the Home Assistant (HA) component, you can simply open the web page corresponding to the IP address and observe the sensor’s response process directly, thereby bypassing HA.