ESP8266 Community Forum

I was not able to get the DS18B20 which seems everybody is using and was able to get DS1820 instead. I loaded the program at https://github.com/ok1cdj/ESP8266-LUA/b ... ds1820.lua and am getting weird outputs, like -4.40 degrees.

I looked at the datasheet, I think the readings are 12bit resolution on the 18B20 and 9bit on the 1820, but could not really see any other real difference. But I am new to all this, so I was wondering if someone can help me decipher what is going on, is there a way to convert the program for 1820 if that is indeed the issue?

Thanks

You found the root of your problem and you can find additional details in this app note

Unfortunately I'm not a Lua coder so I can't help you with the coding but if you study it and the app note I think you can get it to work.

George, The coding was beyond me, so luckily I went back to marketplace and was able to dig out a DS18B20, plugged it in, and it worked as expected. Probably doable, with code change but simpler for me to follow the example. Too much to chew at one time..