433mhz interfacing 89s52

[mishra12]

dear friends
i am able to transmit data connecting txd and rxd pins directly along with gnd wire but when i connect to system using tx and rx no transmission occurs and my modules are ok where i went wrong ?i kept baud rate as low as possible 300bps . i know the problem with data transmission through modules my codes are correct .

 

[nikhilele]

have you used MAX232 if not use it you will get the results
regards

 

[nandhu015]

Can we see your circuit.?

 

[mishra12]

here is my circuit but can i transmit in shift register mode encoding in manchester code how i need sample code

 

[mishra12]

where can i get enough tutorial for manchester decoding ?

 

[nandhu015]

Here is one..

**broken link removed**