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I want to measure soil moisture using THIS sensor. I do not want to use ADC. In the sensor there is a digital output port and an analogue output port. I can use the digital output of the sensor without using adc? Is there any other way to get soil moisture with this sensor without using ADCenter image description here

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Nope, to measure analog value you need some kind of ADC.

Maybe smth like that: http://www.doctormonk.com/2013/12/analog-sensors-without-analog-inputs-on.html

I have not tested it but should work. On the other hand it might be simpler just to use

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The digital output will tell you when the set threshold has been exceeded. You set the threshold with a screwdriver and the blue pot on the board.

It's simplest if you power the device from 3V3. If you need to power from 5V you will need to add a voltage divider on the digital output to shift it from 5V to 3V3.

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This module here can add ADC to the Raspberry Pi. It also has Analogue outputs. http://www.sf-innovations.co.uk/custard-pi-2.html

  • Please could you add some more detail to your answer, link only answers are not preferable. – Darth Vader May 31 '16 at 8:41

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