Shelly Uni to open doorbell via mobile phone

    Hi all,

    I want to install a shelly uni to open the building's entrance door via mobile so I'm looking to install a uni as the doorbell system runs on 12 V AC.

    When reading the wiring diagram it's clear that inputs 1 and 2 need to be used for powering the uni but to wire the doorbell i'm not sure if this is a switch or a button as this is a wall knob with a spring to bounce the knob back to the original position following its use to open the door. My guess is switch as you "close the circuit" even if for only half a second but wanted to confirm this understanding with experts in the forum. If this needs to be seen as a switch can you advise on what resistance to use?

    thanks!

    Will try to give some hints and remarks:

    (a) The inputs IN-1 and/or IN-2 of the Shelly UNI are NOT intended to power the unit, but to attach sensors, switches or buttons.

    (b) Widely used solenoids for opening of door latches are controlled by buttons, not switches, cause the solenoid needs to be activated for some seconds only. Thus, programming of an “auto off” timer with 1 or 2 seconds will be appropriate.

    Zitat

    If this needs to be seen as a switch can you advise on what resistance to use?

    (c) Could you please add more details to your question above?

    (d) Both outputs of Shelly UNI are semiconductor relays, capable to switch 100mA maximum. This is not sufficient to drive an ordinary door solenoid! An additional relay will be necessary.

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)

    Hi thgoebel,

    thanks for your feedback. following up directly to your points:

    (a) The inputs IN-1 and/or IN-2 of the Shelly UNI are NOT intended to power the unit, but to attach sensors, switches or buttons. this is clear! I will need to use red and black wires (1 and 2/VCC and N) to power the uni

    (b) Widely used solenoids for opening of door latches are controlled by buttons, not switches, cause the solenoid needs to be activated for some seconds only. Thus, programming of an “auto off” timer with 1 or 2 seconds will be appropriate. ok great, this means I need to think about this as a button rather than a switch. The reason why I brought this up is that on the diagram that comes with the uni "IN1" and "IN2" have depictions of wiring for button and/or switch so I was unsure.

    (c) Could you please add more details to your question above? given that this is a button it's this doesn't apply anymore as the resistance is only needed if we are talking about a switch, which is not the case

    (d) Both outputs of Shelly UNI are semiconductor relays, capable to switch 100mA maximum. This is not sufficient to drive an ordinary door solenoid! An additional relay will be necessary. this is where I have questions. The wiring diagram figure 4b does not specify how to use the "OUT" (i'm aware OUT1 and OUT2 are wrongly switched in the diagram) so not sure how to wire it up to control the button with the shelly. Do you have a wiring scheme for how to use an additional relay (e.g. Shelly 1 or 1L?)

    thank you very much!

    Pedro

    Seems to me, a Shelly UNI would be not challenged enough in your application: If I understand you correctly, you want to activate a door solenoid via your cell phone? No detection of door bell signal required?

    If this would be true, another solution is feasible: Use a Shelly plus1 to activate the door latch solenoid and control it via the Shelly cloud. The Shelly plus1 has an perfectly isolated relay contact, which is capable to drive the solenoid directly. And the Shelly plus1 may be powered directly from mains voltage - no extra power supply is needed! Disadvantage: You must not connect an extra button! Terminals “I” and “O” of Shelly plus1 have to be connected with the terminals of the existing button/switch for door opener.

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)

    Hi - this is correct, no detection of door bell signal required.

    thanks for the suggestion!

    When you say the Uni is challenged do you mean impossible to use in this context? Just because I have 2 issues - I don't have the regular 220V power supply next to the door button and if I'm able to pull one in addition I don't have the "ground" in my home electrical setup (could I use shelly 1L?)

    thanks for your help thgoebel!

  • Dieses Thema enthält 3 weitere Beiträge, die nur für registrierte Benutzer sichtbar sind, bitte registrieren Sie sich oder melden Sie sich an um diese lesen zu können.