RF 433 Mhz Tx,Rx

[ahmedragia21]

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]

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

 

[ahmedragia21]

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

 

[bananasiong]

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

 

[ahmedragia21]

its XORing the data with a Clock (NRZ)

 

[bananasiong]

its XORing the data with a Clock (NRZ)

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

 

[ahmedragia21]

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

 

[bananasiong]

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