Wiring for standalone PIR sensor

I want to attach my waterproof PIR to a Shelly1 so that I can be notified 24/7 of movement on my drive (through a "state change" within Home Assistant.)

There is no other load (ie a light) on this system.

The PIR has 3 wires ... N, L and L1 (switched live). When I power it up the L1 wire is only powered when the PIR is activated. This suggests it is working.

But when I connect it to a Shelly1...

N > N

L > L

SW > L1

... nothing happens on the Shelly1. I have set the Shelly1 as follows...

• Activation Switch - use it for motion sensor. Any input turns "ON" and resets Auto OFF timer.
  
• AUTO OFF - When On - Turn Off After 5 seconds

The Shelly1 is working in all other respects. What might I be doing wrong?

Thanks!

Zitat von thgoebel

(c) Proposal (b) plus a very well isolated (!) resistor inserted in the connection between L1 and SW is another means to solve the issue. Wattage of the resistor may be 1/2 W or 1/4W, resistance 500kΩ to 1MΩ.

Thank you very much for your help - I have made _some_ progress, but am still not quite finished ...

I have wired in a capload ( see https://www.tlc-direct.co.uk/Products/DNCAPLOAD.html ) as shown in the diagram below. Now, the switched live wire from the PIR is only "hot" when movement is detected (which is what I would want).

But ... whilst the "state" of the Shelly within Home Assistant changes from off to on when I click on the button within the Shelly app, this state change does NOT occur when the PIR is activated. I have tried using Detached Switch _and_ Activation Switch within the Shelly app, but this doesn't help. I have also tried removing the wire between L and | (left hand vertical brown wire).

Any ideas how I can change this? I really want the state change to happen when the PIR activates.

Many thanks!

OK - that is a shame.

Would using a ShellyEM or ShellyPM work? Perhaps I could "monitor" the current in the PIR SW wire, and when above a set threshold activate an automation within Home Assistant?