RS-485 networking question

Archiver

Hello,

A few years ago, I tried using a BS2 and BS2SX to implement a network
connection of 4 slave modules to a master. The slaves had short
header names and looked for their name on the bus and then responded
with analog/digital data read at that location. I also tried to get
fancy and include a checksum at the end of a transmitted message.

To make a long story short, I gave up after about two weeks because
the BS's were to slow. This was about 2 years ago. Are any of the new
models(BS2P?) significantly faster or might they allow me to
implement this protocol now?

Any existing apps and code would also be appreciated.

Thanks in advance.

Archiver

In a message dated 4/16/2003 10:11:50 AM Pacific Daylight Time,
frank.slujtner@j... writes:

> Hello,
>
> A few years ago, I tried using a BS2 and BS2SX to implement a network
> connection of 4 slave modules to a master. The slaves had short
> header names and looked for their name on the bus and then responded
> with analog/digital data read at that location. I also tried to get
> fancy and include a checksum at the end of a transmitted message.
>
> To make a long story short, I gave up after about two weeks because
> the BS's were to slow. This was about 2 years ago. Are any of the new
> models(BS2P?) significantly faster or might they allow me to
> implement this protocol now?
>
> Any existing apps and code would also be appreciated.
>
> Thanks in advance.

You may want to look into the SX, Not BS2SX, plain SX sold by Parallax. Not
nearly as programming friendly as the Basic Stamps, but really FAST. Clocked
at 50Mhz, instructions typically take 20 to 80 nS to execute.

Ken


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