How use RF-tx-315 and RF-Rx-315

[wftan]

Hi,

May i ask, now i need design 2 circuit , 1 is transmitter and another is receiver.

i used RF-TX-315 and RF-RX-315. when button turn on at tx, LED ,buzzer and USART send address. Rx receive match address and will make LED blinking. Is it my codeword wrong?
Why it cannot function??? i use PIC18F452.

Below is my microc codeword:
For transmitter:

CODE: SELECT_ALL_CODE

unsigned short i;
 void main() {
  PORTB = 0;
  TRISB = 0x20;
  PORTC = 0;                 // Initialize PORTC
  TRISC = 0;                 // Configure PORTC as output
  PORTD = 0;
  TRISD = 0;

  USART_init(10000);                     // initialize USART module
                                          //  (8 bit, 10000 baud rate, no parity bit...)

    while(1)

if (Button(&PORTB,5,1,0) )
  {

   PORTD = 0x50;         // LED and Buzzer turn on


  //if (USART_Data_Ready())
  //{            // if data is received
       i = 0x40;
       USART_Write(i);                    // send data via USART
    //   }

      }
  else
   {

    PORTD = 0x00;
    Delay_ms(1000);
   }
   }


For receiver:

CODE: SELECT_ALL_CODE

unsigned short i==0x00;


void main() {
PORTC = 0;                 // Initialize PORTC
TRISC = 0x80;                 // Configure PORTC as output
PORTD = 0;
TRISD = 0;

Usart_Init(10000);

if (Usart_Data_Ready()) {   // If data is received
      i = Usart_Read();        // Read the received data
   }

   if(i==0x40) {

   Delay_ms(1000);
    PORTD = ~PORTD;         // toggle PORTD
  }
      else
{
PORTD = 0x00;
}
}


Thanks for ur help~~

[ZaM]

maybe if u use microC compiler, u can seacrh at HELP for tx n rx code..there are, complete with schematic circuit,just need small modification.

[ABSF]

Below is my microc codeword:
For transmitter:

maybe if u use microC compiler, u can seacrh at HELP for tx n rx code..there are, complete with schematic circuit,just need small modification.

He is using MikroC language. Maybe you can help him check why his program doesn't work.

Allen

[shahrul]

I not use microC and not really understand the code function. I have sample video for RF here.

What you need to change, like
If push button pressed, uart transmit 0x01. If push button release, uart transmit 0x01.
Then receiver receive that data and response to what you need to be.

[yonghui]

hi,
u can refer to cytron DIY project on RF for the source code.
the RF will need some filtering. because the receiver will keep on receive noises. when the transmitter is not transmitting anything .

regards,
yh