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Electronic gardening tool and method of configuring the same

DC
  • US 8,938,361 B2
  • Filed: 12/07/2010
  • Issued: 01/20/2015
  • Est. Priority Date: 12/07/2009
  • Status: Active Grant
First Claim
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1. An apparatus for measuring a soil characteristic, comprising:

  • a sensor circuit adapted to output an analog signal reflecting a measure of the soil characteristic;

    an analog-to-digital converter adapted to convert the analog signal to a digital value;

    a microcontroller receiving and processing the digital value; and

    a display panel for displaying the measure of the soil characteristic;

    wherein the microcontroller is configured to;

    obtain a plurality of initial readings from the sensor circuit when the apparatus is powered on;

    obtain a nominal value by averaging the initial analog readings; and

    assign a zero reference associated with a neutral value of the soil characteristic to the nominal value derived by averaging the initial readings.

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