PIR sensor and DHT22 sensor.

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  • Hi :)

    I know the Shelly PLUS Add-On only supports a single DHT22 sensor.
    I was wondering if it would be possible to have a single DHT22 sensor and a single PIR HC-SR501 sensor.

    Basically two different sensors in the same device.
    And if so are there any instructions out there or any tutorials on how to configure it.

    The goal would be to have a single ceiling mounted "device" in my bath room that activates a fan if the humidity is too high or if there's someone in the bathroom.

    Kind regards.

  • Welcome to the forum!

    Due to the fact the HC-SR501 has a digital output with open collector, it can be wired with the digital input of the Add-On. Hence, the 1-wire bus of the Add-On ist free for a connection with a DHT22.

    To supply the HC-SR501 with 3,5V Vcc of the Add-On, the PIR sensor must be slightly modified, as described in post #11 of this thread:

    thgoebel
    19. Juni 2023 um 11:37

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