Pic + RF Module or RFPIC

[koossa]

Dave, thank you very much for your reply!!

What I want is a cheap and reliable way to transmit data.
According to the microchip link (http://www.microchip.com/wwwproducts...cName=en010384) the rfPIC12F675K cost USD2.40

I actually want the most cost effective way to Transmit RF data over about 15meters.
I did play around with RF in the past and I struggled so much that I just never touch it again, so I want a solution that would not take me months to get working.

[mackrackit]

That seems cheap, but the you need the receiver also. rfRXD0420/0920 $2.89 from MicroChip. LQFP package If you are doing a production run they would be great.

But if it is a one or two thing....

The cheapest/ease of use I know of is these
http://www.rentron.com/remote_control/TWS-434.htm
http://www.rentron.com/remote_control/RWS-434.htm
All the need is an antenna and a PIC.
I tested some and had no trouble at a half mile line of sight.

Just my opinion.

[koossa]

Dave, thank you!

My problem is, that my customers will have for example 10-500 transmitters and 1 receiver and I want to go in production with it, so $1 would make a huge difference

I just want to transmit a 15 digit ID, one at a time.
Do you think I would easily get the Microchip rfPIC12F675K running?

[mackrackit]

I see. Many units...

I have not used the parts individually. Helped with a dev board setup. Seems pretty straight forward.

Here is a sample code from Bruce
http://www.picbasic.co.uk/forum/show...4830#post44830

Sending the data should be easy enough. You will need a checksum or some other error checking.
The basic code could be

SEROUT2 PORTC.6, 16780, [ STR DATAOUT\16, $d, $a]

[koossa]

Thank you very much Dave!!

[mackrackit]

One last thing if you have not seen it yet.
The basic hardware for the receiver side of Microchip's rf stuff.
http://ww1.microchip.com/downloads/e...tes/tb070a.pdf

[Ioannis]

If you insist on using an rfPIC thats fine. But for the receiver, since it is one piece, why not use the module proposed?

As David said is plug and play.

Note that you can use Serial commands for transmiting the ID but you have to use some NRZ enoding. Like Bi-phase or Manchester. It has to do with he receiver itself.

Ioannis