New Hydroponic Instrumentation/automation Build

[DGP]

Your noise could be comming from power supplies, ballasts, led drivers .... Try putting a ferrite core on the probe cable, see if it helps. Could also be the flow of the solution in the bucket messing with readings.

You're putting together something I've been dreaming of for quite some time. Rpi controlled grow room with a touch screen display and my own GUI. Too bad I don't have time for the code. Putting hardware together goes pretty quick unless one runs into trouble like yours.

Yeah we are currently investigating conducted emi/rfi. The world is a noisey place and manufacturers almost always fudge their compliance testing.....

We have a site that will be using this for a grow of over 320 uc hydro buckets so it has to be done this year. So we are under some pretty severe pressure. Its good though cause we will get to it sooner rather than later.

Dee