DFrobot Gravity Conductivity switch

Hello !
I am having issues using the conductivity switch.
https://www.dfrobot.com/wiki/index.php/ ... U:_SEN0223
Everything was working great on my computer, but at the moment I plug my arduino and the switch with an adaptator, it starts to show eratic values, until it seems to be fully down ...
I use a 12V 1.25A adaptator to run my arduino and, of course, I plug the VCC of the dfrobot module on the 5V pin.
And then it starts showing me, sometimes High value, even when I wasnt touching the switch to close it. After that, it continue to give me High value and it never stops anymore. Like if it was down.
If I plug my arduino back to my computer, not on the 12V anymore, it keeps giving me High value, like forever...whatever I am doing.
Is it really broken ?
Thanks for your help.
I am having issues using the conductivity switch.
https://www.dfrobot.com/wiki/index.php/ ... U:_SEN0223
Everything was working great on my computer, but at the moment I plug my arduino and the switch with an adaptator, it starts to show eratic values, until it seems to be fully down ...
I use a 12V 1.25A adaptator to run my arduino and, of course, I plug the VCC of the dfrobot module on the 5V pin.
And then it starts showing me, sometimes High value, even when I wasnt touching the switch to close it. After that, it continue to give me High value and it never stops anymore. Like if it was down.
If I plug my arduino back to my computer, not on the 12V anymore, it keeps giving me High value, like forever...whatever I am doing.
Is it really broken ?
Thanks for your help.
2017-07-04 23:00:43 Theoretically there is no problem when you plug in a 12V adaptor, what do you use this module for, because it's only connect to a digital pin, it can just output high level and low level. what's the value you mean?
robert.chen

2017-06-30 11:24:41 Thanks for your answer.
Yes my arduino is working great, since the couple arduino + dfrobot module are working, when they are plugged with my computer.
It is just when they are plugged on a 12V adaptator that it is not working.
thi.leuridan
Yes my arduino is working great, since the couple arduino + dfrobot module are working, when they are plugged with my computer.
It is just when they are plugged on a 12V adaptator that it is not working.

2017-06-30 00:00:56 Did you check if your Arduino is good? and what do you use this conductivity switch for?
robert.chen
