Most PIR sensors can't detect motion again for a set period of time. I am not sure what Securifi's is. This is normal so that you don't waste a ton of battery and don't get motion activations every second. Mine are 4 minutes so my lights turn off after that period runs out.
That's totally logical and how Securifi's sensor should work too, but it doesn't...
There is a selectable interval on the sensor, 5 seconds to 3 minutes, to set 'redetection' interval.
Mine is set to 1 minute, and when it detects motion, it does wait 1 minute before detecting again.
But.... when it detects motion, it sends a 'motion' signal and IMMEDIATELY after that, it sends a 'no motion' signal.
And after 1 minute, when it should redetect if there is motion, it does NOT send anything when there is no motion.
You get the problem?
By then I can turn the lights on manually (through the app not through rules) if I need them or let them go off if I don't.
That's ok for a living room or bedroom or whatever, but I'm using it in the bathroom (toilet only) and I want it to turn on when you enter and turn off automatically after you leave.
That is working now, if you don't stay in there longer than 60 seconds, otherwise the light starts going on and off.