Help soil moisture sensor

[juchalin]

Hi everyone, I am trying to make the soil moisture sensor of the site.
It appears in Domoticz but I have only negative value, I do tests with a glass of water, it changes vaguely but hey it changes even when the probe is disconnected, All my connections are good here is my hardware:
https://www.amazon.fr/gp/product/B00K67Z76O/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

[gohan]

Without knowing your sketch and how you connected the sensor to the node, it is difficult to say

[juchalin]

Hello it's nice to answer me.
I followed the tutorial to the letter:
Connection and code

https://www.mysensors.org/build/moisture