DS18b20 not found
Posted:
Tue Sep 13, 2016 6:36 amby Manowar
The task is to get data from ds18b20 and send it through the internet using mqtt. First tried it via C in eclipse, ds18b20 was detected correctly but i couldn't publish through te internet, only in local network. Then i tried Arduino ide, it sent all correctly but another problem - ds18b20 not detected. So what's the problem??? I thought about problems with DS, but with C code it works well.
Re: DS18b20 not found
Posted:
Tue Sep 13, 2016 4:16 pmby martinayotte
Do you have a 4K7 PullUp on the data line ?
Re: DS18b20 not found
Posted:
Wed Sep 14, 2016 2:22 amby Manowar
No, i don't. But when i had done it via C, this part worked well.
Re: DS18b20 not found
Posted:
Wed Sep 14, 2016 12:52 pmby martinayotte
You should !
Probably the library you used in plain C were enabling the internal PullUp, but I recommend to still using external one, since for long wires, the OneWire specs require 4K7, far from internal one which is around 100K.