[riot-devel] Soil Moisture Sensor

Akshay Mishra akshay at dspworks.in
Tue Oct 11 16:58:08 CEST 2016


Start with measuring the voltage value? Try giving some different analog
input less than 3.3V



On Tuesday, 11 October 2016, ALESSANDRO NICOLI <
alessandro.nicoli at studenti.unipr.it> wrote:

> Hi all,
> I'm trying to use a Soil moisture sensor with a Samr21-xpro and RIOT os.
> The sensor used is as follows :
>
> https://www.seeedstudio.com/Grove-Moisture-Sensor-p-955.html
>
>
> I have *4 soil jars (with different moisture concentrations)* that i'm
> gonna use for testing,  i've already tried to get moisture values with *Arduino
> Uno* and they seem to be acceptable.
> *For both, i used the built in ADC with 10 bits of resolution.*
>
> But when i try to use the samr21, it gets me always 330 as value (10 bits
> ADC).
> For the SAMR21* i used the default parameters for ADC_0*.
>
> There is a way to rectify the readings, or some kind of calibration to do?
>
>
> Thanks a lot,
> *best regards, *
> *Alessandro*
>


-- 
*Akshay Mishra*
*Chief Technology Officer*
GSM: +91 98693 21611
Skype: mishrakshay
Office: +91 22 2500 3488
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