RF 433 Mhz Tx,Rx - Electronic Circuits Projects Diagrams Free

ahmedragia21 · 8th May 2008, 02:33 AM

Hi , im trying to use this module , but without sending any bytes thru it , it gets out noise from the room and it sends bytes it self !! .. i tried to send four 10101 then at the reciever if it couted three one's do something ... it does count all things at one sample !! sounds like it gets noise from out .. how to solve this ?

**Nigel Goodwin** · 8th May 2008, 08:21 AM

You need to use Manchester coding and decoding, check my tutorial.

ahmedragia21 · 8th May 2008, 09:29 PM

Can i use this encoding scheme ? like XORing a clock with the data to be encoded as a manchester ??

bananasiong · 9th May 2008, 01:20 AM

Hi,
XOR the data with something is not Manchester coding, it is type of encryption I think. Manchester coding has to be done in the software as in the tutorial.

ahmedragia21 · 9th May 2008, 01:23 AM

its XORing the data with a Clock (NRZ)

bananasiong · 9th May 2008, 01:44 AM

Quote:

Originally Posted by ahmedragia21

its XORing the data with a Clock (NRZ)

Oh, that's okay. But how are you going to do that?

ahmedragia21 · 9th May 2008, 01:48 AM

i dont know that's why i asked

, at wikepedia it shows the proof
XOR CLK & Data == Manchester Code

bananasiong · 9th May 2008, 01:54 AM

Yeah but you still have to do it in software in PIC, as in the tutorial.

8th May 2008, 02:33 AM	(permalink)
ahmedragia21 Experienced Member	RF 433 Mhz Tx,Rx Hi , im trying to use this module , but without sending any bytes thru it , it gets out noise from the room and it sends bytes it self !! .. i tried to send four 10101 then at the reciever if it couted three one's do something ... it does count all things at one sample !! sounds like it gets noise from out .. how to solve this ?

8th May 2008, 08:21 AM	(permalink)
Nigel Goodwin Super Moderator	You need to use Manchester coding and decoding, check my tutorial. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

9th May 2008, 01:20 AM	(permalink)
bananasiong Experienced Member	Hi, XOR the data with something is not Manchester coding, it is type of encryption I think. Manchester coding has to be done in the software as in the tutorial. __________________ Superman returns.. Please vote.

9th May 2008, 01:54 AM	(permalink)
bananasiong Experienced Member	Yeah but you still have to do it in software in PIC, as in the tutorial. __________________ Superman returns.. Please vote.

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8th May 2008, 09:29 PM	(permalink)
ahmedragia21 Experienced Member	Can i use this encoding scheme ? like XORing a clock with the data to be encoded as a manchester ??

9th May 2008, 01:23 AM	(permalink)
ahmedragia21 Experienced Member	its XORing the data with a Clock (NRZ)

9th May 2008, 01:48 AM	(permalink)
ahmedragia21 Experienced Member	i dont know that's why i asked , at wikepedia it shows the proof XOR CLK & Data == Manchester Code

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