Is it allowed to change pin reference within a subroutine?

[Alberto]

you realise of course the ow device takes 750mS or so to complete the conversion
before the read scratch pad can occur or you can poll the busy state

No! I didn't realise the convertion was such a slow process!

Well I need to modify the code to cope with this necessary delay.

Thank you Richard to have brought to my attention this problem.

Alberto

Edited: Dave, the reason for not using a single pin for all 3 devices using match rom comand is simple: I did try but I failed! But now that I am aware of this long delay necessary for the convertion time, I am happy to have choosen the three separate pins, becouse in this way I can split the delay of 750 milliseconds and get all three values in 750. - 800 milliseconds.

[Dave]

Alberto, If you operate the sensors off local VDD instead of Parasitic power you can start each conversion and then check for each to be finished while the others are doing there conversions. That is the problem with Parasitic power in that you can only communicate with 1 device on the bus.