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  • 05/07/2020

    This module will be used for presence detection activating a ventilator when the room temperature is over 22C. This is made possible when you connect this sensor to a esp board and integrate this with Home Assistant where the automation is created and maintained. This module is of high quality and I would recommend it to everyone.

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  • 08/07/2020

    Tested positively until 3 meters, using Arduino's "NewPing" library, good precision. Mounted on a known distance, it can be used to measure sound's actual speed in the given air's temperature and humidity. Distances are meant from the forward border of the ultrasonic capsules: in the image, an example on 10 cm. Tried without problems up to 3 meters away, using the Arduino library "NewPing", with discreet precision. Mounted on a known distance, it can be used to measure the actual speed of sound under the present temperature and humidity conditions. The distance is from the front edge of the ultrasonic capsules: in the image an example in 10 cm.

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  • 11/11/2020

    Amazing Product I recommend it 👌

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  • 14/12/2020

    All well received in good condition.

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  • 01/07/2020

    well received, well packed, everything is in order a site to advise

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  • 22/10/2020

    good quality, fast delivery

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  • 06/02/2021

    product arrived perfect

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  • 25/01/2021

    I arrive in very good condition, I have tried it and it works properly, a good product.

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  • 14/01/2021

    excellent

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  • 08/09/2020

    Works well with ESP32 and Arduino. Came is separate plastic bag.

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