Hello all,

I've built a small project which uses one 18S20, which works well. I am now
trying to write a routine to get the serial numbers of a number of devices
connected to the 1 wire bus.

I'm using C has anyone written some code they are prepared to share, or can
you point me to a good source/webpage ?

Tony Nixon wrote:

> Hi all,
>
> I've been putting together a small data logger application that uses 4
> of the DS18S20 1 wire temp sensors, a Honeywell humidity sensor and two
> electronic scales that I talk to with bit banged RS232 code. I then
> relay the results to the PC via the UART, or just store to local I2C
> memory for portabillity.
>
> The data sheet says 750mS to get each temp conversion and some people
> here want to use the logger with more temp sensors. The trouble is the
> acquisition time goes up substantially and you can't really say that the
> temps were all logged at exactly X time.
>
> Is there any way around this that anyone knows of.
>
> Assuming someone knows the DS18S20, I was wondering if you could use a
> bypass ROM command and start the conversions all together, and then read
> individually after just a single 750mS conversion???
>
> --
> Best regards
>
> Tony
>
> mICros
> http://www.bubblesoftonline.com
> mailto:sales@bubblesoftonline.com
>
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