Radiotransmitter/receiver RWS 434/tx-saw

Archiver

I wonder if it is possible to use one reciever typ rws-saw to get values
from several transmitters.
I am planning to connect a tempsensor to the transmitter and get the
temp from several places.
"One sensor for each room" and one reciever.

Robert


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Archiver

In a message dated 4/14/2004 4:00:43 PM Eastern Daylight Time,
robert.bohlin@b... writes:


> I wonder if it is possible to use one reciever typ rws-saw to get values
> from several transmitters.
> I am planning to connect a tempsensor to the transmitter and get the
> temp from several places.
> "One sensor for each room" and one reciever.
>

Yes, you can do that. The Stamp that is connected to the Tx will serout for
sensor A - serout pin, baud, [noparse][[/noparse]"A", data].

The Stamp connected to the receiver will serin - serin pin, baud, [noparse][[/noparse]wait("A"),
dec com]

And so on for sensor A.B,C etc. The receiving Stamp will know that A is the
bathroom, B is the kitchen, or whatever. I'm doing precisely that with 32
inputs.




Sid Weaver
W4EKQ
Port Richey, FL


[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver

> > I wonder if it is possible to use one reciever typ rws-saw to get values
> > from several transmitters.
> > I am planning to connect a tempsensor to the transmitter and get the
> > temp from several places.
> > "One sensor for each room" and one reciever.
> >
>
> Yes, you can do that. The Stamp that is connected to the Tx will serout
for
> sensor A - serout pin, baud, [noparse][[/noparse]"A", data].
>
> The Stamp connected to the receiver will serin - serin pin, baud,
[noparse][[/noparse]wait("A"),
> dec com]
>
> And so on for sensor A.B,C etc. The receiving Stamp will know that A is
the
> bathroom, B is the kitchen, or whatever. I'm doing precisely that with 32
> inputs.
>
> Sid Weaver
> W4EKQ
> Port Richey, FL
>



Be sure to include some Error Correcting algorithm, or you will no get 100%
good data at the receiver side.
Try to search for FEC, Reed-Solomon and Hamming codes.

There are some algorithms on the net, that implement it on 8bit registers,
adding more 4bits or so.
Transmitting algorithm for TX, and then the opposite on Receiver side.

I believe it is simple to convert the algorithms to Stamp code.

Regards,
Antonio Sergio Sena
CT2GPW

---

Antonio Sergio Sena
(Field Applications Engineer)

Primetec - Engenharia de Sistemas, Lda.
Rua Porto Alegre, 9 - 1º Esq.
2780-031 Oeiras
PORTUGAL

e-mail: asena@p...
WEB: www.primetec.pt







.