Presence & Multi Sensor (Shelly Blu Motion)

Hardware
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1

Hiya! I’m having trouble finding a good not so expensive presence/lux/humidity/temperature/co2 sensor for the company offices - we’d have around 15-18 sensors so we’re looking to be as cost effective as we can be.

I noticed the shelly Blu Motion fairly cheap around 20EUR & i’m wondering can the Shelly Blu Motion connect to the Wi-Fi thru a dimmer switch from Shelly as this would save us a lot of money than the Aqara and other options.

Sadly the MSR2 is inacessible for EUROPE or overpriced (85EUR/sensor) so the cost would be around 1,300EUR+

If anyone has any tips - ideas. Every office would be equipped with a sensor & dimmer switches for the lights (dimmable ones)

2

Depends on your dimmer. If it’s 1st gen dimmer, no, otherwise yes.

3

If i were to get a “SHELLY 2PM GEN3” or “SHELLY DIMMER 2” - i’d love to be able to read data from the door/window sensors & Blue Motion.

Is it also possible for the Blu motion sensor to be directly connected without a battery?

4

With this yes, you can use it as gateway.

You can substitute the battery with 3V power supply.

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5

Thank you very much for the help - since i’m planning to do a large project for the company offices we will have a lot of elements which wouldn’t be viable to do via batteries. Gonna pull a straight 5V/3V line next to radiators & connect the smart TRV’s & blue motion sensor if possible to the same line. The door sensors etc. would stay battery powered.

If i understood it all correctly this would be possible right?
Senzor Vrat = Door Sensors
Senzor Oken = Window Sensors

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6

Of course. What battery TRVs have?
Be aware that if wiring is long and wires tiny, there’s some voltage drop. 3.3V power source might be better for Shelly blu.

7

2x 1.5V Batteries for Shelly TRV’s

Might be the best choice to do it in every room with a possibly small 220v/3.3V converter inside each TRV or for the small line it takes to connect each one

8

No need to be so complicated, just use decent wire for TRVs.

1 Like
9

If all goes well hopefully won’t burn down the building :joy:

10

With 3V2A power supply would be quite difficult. Batteries are more dangerous.