On Sunday, 7 October 2018 16:25:42 BST Graeme Gemmill wrote:
> Ralph, Terry, thanks for the replies. Further information:
> Sensors are Hobby Boards DS18S20 and Sheepwalk SWE3 humidity sensor.
The only common factor with those two devices would seem to be the +5 V PSU
brick. If the PSU voltage was varying by a small amount over time, then the
readings will too. If this is the case, you might have to provide a PSU brick
with better regulation or insert a regulator into the line between the brick
and the devices.
Can you run the two devices from separate PSUs to see if the variations stay
in step?
--
Terry Coles
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