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Hi I have problem with nodemcu v3 and ds18b20 with 4.7 resistor on esp easy mega. Esp not seeing device address but when i load sketch from arduino ide everything working fine. Ds18b20 working on raspberry address is visible so sensor is ok. I changed resistor to 2.7 same issue, 1.7 same issue not picking address. Nodemcu tested with different sensors like dht or bme all working so node is ok. DS18b20 tested with two different nodemcu v3 same issue. Did someone had this issue before.
You need a level converter! You may have fried the gpio on the unit. They are expecting no more than 3.3V
Ok, so you're feeding the ds18b20 3.3V? I feel that we're playing the guessing game here. I know that the ds18b20 is compatible with 3.3V but I always use 5V together with level converter.
I see then it might be internal, are you able to test a different sensor?
And you got them working when you flash a small sketch? I mean you're referring to the Arduino IDE. If that is the case it may be an bug. What version are you running?
As a reference point, I'm using mega-20180714 and DS18B20 is working fine.Esp not seeing device address but when i load sketch from arduino ide everything working fine.
The Device Address entry will initially be blank. It will be hidden, requires enabling. To enable the DS18B20 you must click-select the Device Address pulldown and choose the discovered address from the populated list. See photo:
If your address is missing then try the mega-20180714 release. If it works then the latest release has a bug.
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