how to use RF module 27980 and 27981

smc650307

hi,
How do I·write the·code·from the·transmitter(it connect a BS2)·to·receiver(it connect another BS2)·

Franklin

Take a look at this page (it's the manual that should have come with your transmitter) www.parallax.com/dl/docs/prod/rf/27980-ParallaxRFTransmit-v1.0.pdf
There is also one for the receiver.

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- Stephen

smc650307

thanks

How do I program to use one transmitter sending data to designed receiver(I have some receivers)

Chris Savage

The manual provided at the link above gives examples of sending data from the transmitter to the receiver. Without any additional clarification of what you’re looking for it is unlikely anyone will have a different answer. Please be more clear in your question. Take care.

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Chris Savage
Parallax Tech Support

smc650307

thanks
My question:
I have one transmitter and three receivers. I want to use one transmitter to send data to different receiver. what can I do?

Franklin

If all the receivers are on the same frequency then the message you send will have to have an identifier for which receiver it is intended for and that receiver will process the rest of the message while the others ignore the message. In other words, it would have to be done in software.

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- Stephen

smc650307

Could you give me some example for it?
Thx

Chris Savage

For one transmitter and three receivers you can use a header to identify which receiver the message is intended for. All three receivers will get the message, but only one will act. A simple example would be the transmitter sending out:

SEROUT pin, baud, [noparse][[/noparse]“!ID01”, data]

The first receiver might have the following:

SERIN pin, baud, [noparse][[/noparse]WAIT(“!ID01&#8221[noparse];)[/noparse], data]

While the second receiver might have:

SERIN pin, baud, [noparse][[/noparse]WAIT(“!ID02&#8221[noparse];)[/noparse], data]

I hope this helps. Take care.

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Chris Savage
Parallax Tech Support