Can we have multiple 1-wire devices on single pin?

[CuriousOne]

Arduino supports that, but I have not found anything about for that in PBP reference manual...
I want to hook up 4 pcs of DS18B20 to single pin. As I have read, each has unique identifier, so it should be possible, but how?

[Charlie]

It is quite doable, you just need to write your own code. Do a search of the forum - I know there is a code example because I've used it 8-9 years ago. There are no native commands in any language I'm aware of. This is not PBP vs C or PIC vs Arduino.

[Dave]

Here is a program I wrote some years ago to do a search of 1 wire devices present on a single bus.

[towlerg]

I've never understood the logic behind the find all the serial numbers function, unless you know what each device (using it's serial number) is measuring it seems pointless. For example in s asystem with three devices, one measuring ambient, one measuring input temp and another measuring output temp - how does it help to be able to determine the serial numbers of the devices when you don't know which ones which?

[pedja089]

You just add one device at time. And search after you add one.

[Dave]

Exactly correct. What I do is scan each sensor 1 at a time and take the serial number and attach it to the sensor lead with a piece of paper under a piece of transparent film. That way I can replace any sensor in my system with another one and just change the serial number in the code.

[towlerg]

True, but isn't it easier to know which serial as you install each device.