ESP8266 Community Forum

- Sat May 07, 2016 12:09 pm #47062 Hi All

Can I use multi 1 wire device ? I want to use two ds18b20 my project

thaks and regards

- Sat May 07, 2016 1:14 pm #47067 Yes you can pin2 is one wire...

There is an example of this temp sensor in the programming examples section...

And if I recall correct the one wire bus supports several devices I am not sure as to what the hard limit is on the one wire bus for the esp8266 but I would assume it depends on the power and hardware I know a 1wire bus is able to search out and find 75 devices per second.

But I am near 99.9% sure 2 temp sensors should not be an issue at all.

Enjoy

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- Sun May 08, 2016 4:16 am #47100 thanks for answer
I tried 2 sensors , no any problem works well

like code;

let cura=0
temp 0 cura
let curb=0
temp 1 curb
wprint cura
wprint curb

all ok