RF 433 Mhz Tx,Rx

A

ahmedragia21

Member

• May 7, 2008

• #1

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

Super Moderator

Most Helpful Member

• May 8, 2008

• #2

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

 

A

ahmedragia21

Member

• May 8, 2008

• #3

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

 

bananasiong

New Member

• May 8, 2008

• #4

Hi,
XOR the data with something is not Manchester coding, it is type of encryption I think. .

 

A

ahmedragia21

Member

• May 8, 2008

• #5

its XORing the data with a Clock (NRZ)

 

bananasiong

New Member

• May 8, 2008

• #6

ahmedragia21 said:

its XORing the data with a Clock (NRZ)

Click to expand...

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

 

A

ahmedragia21

Member

• May 8, 2008

• #7

i dont know that's why i asked , at wikepedia it shows the proof
XOR CLK & Data == Manchester Code

 

bananasiong

New Member

• May 8, 2008

• #8

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