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structure7 / fridgeTemps

Monitoring of a refrigerator and freezer's temperature to an OLED display.
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Idea for defrost dropout: Separate power source? #32

Open structure7 opened 7 years ago

structure7 commented 7 years ago

So it seems the temp sensor is getting an error. It's not that the WeMos is dropping out. Need to confirm this by removing the "don't report an error" code to see the true frequency in graph.

Try a complete isolated/external power source in lieu of the fridge. Wall wart or the like.

structure7 commented 7 years ago

NEW IDEA! Maybe there's a power quality issue between VCC and Ground at the sensor.

Got the idea from this schematic of a packaged DS18B20 "brick:" https://arduino-info.wikispaces.com/Brick-Temperature-DS18B20. There's a .1μF cap between VCC and Ground.

Might try to hotwire one in and see what happens.