badri89
Junior Member level 3
Re: help regarding 433 mhz transmitter and receiver interfac
Hi people, I am trying to send a '1' from 434 tx to 434 rx so that the led connected in the receiver led glows.. the transmitter has got 4 pins namely antenna,vcc,gnd and data...i connected a small wire in the antenna pin...and for data i connected the txd pin of at89s52 with data pin of transmitter..the receiver consists of 8 pins..antenna..to which i connected a wire and left out..for the data i connected it from the rxd pin of the at89s52..actually there were 2 data pins so i shorted them and connected to txd pin..the following is the program i am using...
Added after 5 hours 38 minutes:
now i could understand that i got to encode the data what i am going to send..when i searched i found i got to use manchester encoding..now could u guyz please tell me how to do manchester encoding and decoding ...
Hi people, I am trying to send a '1' from 434 tx to 434 rx so that the led connected in the receiver led glows.. the transmitter has got 4 pins namely antenna,vcc,gnd and data...i connected a small wire in the antenna pin...and for data i connected the txd pin of at89s52 with data pin of transmitter..the receiver consists of 8 pins..antenna..to which i connected a wire and left out..for the data i connected it from the rxd pin of the at89s52..actually there were 2 data pins so i shorted them and connected to txd pin..the following is the program i am using...
Code:
//TRANSMITTER SECTION
#include <reg51.h>
void main(void)
{
int i;
TMOD=0x20;
TH1=0xFD;
SCON=0x50;
TR1=1;
while(1)
{
SBUF=1;
while(TI==0);
TI=0;
}
}
//RECEIVER SECTION
#include <reg51.h>
sbit mybit=P2^0;
void main(void)
{
TMOD=0x20;
TH1=0xFD;
SCON=0x50;
TR1=1;
while(1)
{
while(RI==0);
mybit=SBUF;
RI=0;
}
}
But i am not getting any output at the receiver what might the problem...please help me out..Added after 5 hours 38 minutes:
now i could understand that i got to encode the data what i am going to send..when i searched i found i got to use manchester encoding..now could u guyz please tell me how to do manchester encoding and decoding ...
