Wind speed sensor

  • Hi dear Shelly community,

    What would be the most straight forward way of coupling Shelly UNI with (if any):

    DIY Wind speed sensor (AliExpress)

    ... to fire up some action when certain wind speed (Voltage) is reached?

    I've noticed that Shelly UNI has only digital inputs which makes me think there is no way of performing some action based on the certain input voltage (or am I missing something)? :/

    Thanks for any helpful tips or answers in advance! :)

    Side notes:

    - Please note that my electrical engineering knowledge is limited so some easy to understand explanations would be really appreciated.

    - This is not advertisement for the product above - the thing is it's the only one I could find for a moderate price.

  • The Shelly UNI has an analog input, which may be configured for 0 -12V or 0 - 30V (DC) measurement range. The “Lexicon” gives you useful information: click!

    Unfortunately, the 0 - 1,2V output of the above mentioned device utilises only 10% of the measurement range. Thus, it would be better to search for a wind sensor which delivers a 0 - 10V signal.

    „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)

  • Thanks for fast response.

    That's awesome news.

    So if I understand it right the analog input is marked with ADC_INPUT (PIN-3) on the "Lexicon" you've shared above:

    [Blockierte Grafik: https://smarthome-forum.eu/index.php?attachment/24649-shelly-analog-input-png/]

    Would then connecting the wind speed sensor to PIN 2 (?GND?) and PIN 3 (ADC_INPUT) work out of the box?

    Is it then possible to set some action at the certain voltage directly from the Shelly Cloud (UI) Android application?

    Side question:

    Are these official User manuals:

    Shelly UNI Universal WiFi Sensor Input User Guide - Manuals+
    UNIVERSAL WIFI SENSOR INPUTUSER GUIDE LEGEND Red – 12-36DC Black – GND or Black and RED -12-24AC White – ADC Input Yellow – VCC 3.3VDC output Blue – DATA Green…
    manuals.plus
  • Yes, the wind speed sensor works out of the box at Shelly UNI, But, as I mentioned before, the precision will not be perfect. This due to the small voltage band the wind speed sensor is generating,

    You may set an action in Shelly UNI menue which activates an output or an url command, if a certain voltage at the analogue input is exceeded.

    And yes - all documents in Lexicon are official ones…

    „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)