This is my second Nivian system, the NVS-ALARM1-W. I’ve already gathered experience with the NVS-A6WG set, so I knew what to expect. Like the other set, this one suffers from poor documentation: the manual mentions a “Settings” button but gives no explanation of what it actually does.
The included motion sensor (NVS-D1A, now replaced by NVS-D2A) works, but only if you understand its quirks. After an initial detection, it will only trigger again if there has been no movement for 4 minutes. If movement continues during that time, the retrigger is delayed further — behaviour that isn’t documented anywhere.
My summary for the other product applies here too:
If you buy this system, expect to spend time configuring it and replacing weak components like the sensors. Pair it with more reliable third-party sensors, push Tuya support for better app handling, and be prepared for minimal documentation. Do that, and it will serve its purpose at a low price.
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