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OpenSprinkler › Forums › Hardware Questions › Soil moisture sensor SMT50

  • This topic has 2 replies, 3 voices, and was last updated 6 years ago by Ray.
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  • March 24, 2019 at 11:13 am #59450

    MariaGardener
    Participant

    Hi,

    I consider using OpenSprinkler in my garden and would like to connect a soil moisture sensor.
    I have choosen the soil moisture SMT50 by http://www.truebner.de which has an analog voltage output between
    0-3V, see datasheet SMT50
    Any advice on compatibility with OpenSprinkler is very appreciated.

    Maria

    March 29, 2019 at 5:12 pm #59508

    christert
    Participant

    I would love support for the smt50 sensors as well.

    May 15, 2019 at 2:47 pm #60378

    Ray
    Keymaster

    It’s tricky to use an analog sensor with OS 3.0 — the reason is that OS 3.0 uses ESP8266 which has only 1 analog pin and that’s already used for sensing solenoid current. If you want to interface with additional analog sensors you will have to get a ADC module (like PCF8591) and connect it to OS 3.0 through I2C.

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OpenSprinkler › Forums › Hardware Questions › Soil moisture sensor SMT50