I have a temp monitoring setup that includes an Esp8266 with 2 DS18B20's, showing readings on an OLED display and publishing to MQTT for monitoring my garage fridge/freezer.
The two DS18B20's - 1 is mounted in my fridge, and the other in the freezer portion. Prior to putting the sensors in the fridge everything worked great. Once in the fridge everything works for about 12 hours, and then I get sporadic weird readings. And they always come back with a weird reading of something like 9 F freeze and 8F fridge. It will give this bogus reading every 2-3 readings (With the other readings being correct).
If I take the one lead out of the freezer, and leave it in the open....Everything will work perfectly. Fridge temp is correct, and the freezer temp (now outside the freezer) reads correct.
Put the lead back in the freezer, will work for about 12 hours, and then same problem.
And yes I do have the 4.7K resistor.
Any thoughts ideas?