Start with measuring the voltage value? Try giving some different analog input less than 3.3V
On Tuesday, 11 October 2016, ALESSANDRO NICOLI < alessandro.nic...@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
_______________________________________________ devel mailing list devel@riot-os.org https://lists.riot-os.org/mailman/listinfo/devel
