Hello again,
I'm trying to make a simple communication project with using tws-434 and rws-434 kits which are 433MHz RF communication kits.
I just send a constant number(16H) with transmitter and check the data at reciver , if the receiver gets 16H it will light on a led to show the correct data is taken.
The codes are very simple but unfortunately i could never seen the led light.
I wonder if you could take a look at my codes and advice me what to do. Thank you very much....

TRANSMITTER:

DATA0 EQU 28H
TEMP EQU 31H
TE EQU P2.0 ;TRANSMIT ENABLE PIN



ORG 0000H
AJMP START


ORG 0100H

START:

CLR TE ;TRANSMIT ENABLE PIN OF HT640
MOV DATA0,#16H

MAIN:
MOV A,DATA0
ACALL SEND
AJMP MAIN

SEND:

MOV P1,A ;PUT DATA0 TO THE DATA BUS (D0-D7 OF HT 640)
SETB TE
ACALL WAIT
ACALL WAIT
CLR TE ;GIVE AN INTERRUPT TO TE PIN TO START RF COMMUNICATION
ACALL WAIT
ACALL WAIT
RET

WAIT:
MOV TEMP,#0FFH
HERE:
DEC TEMP
MOV A,TEMP
JNZ HERE
RET
END






RECEIVER:



RCV EQU 28H ;DATA FROM RF
TV EQU P2.0 ;DATA IS RECEIVED INTERRUPT
LED EQU P2.1 ;CORRECT DATA IS RECEIVED LED


ORG 0000H
AJMP START


ORG 0100H
START:
CLR TV ;CLEAR FLAG
SETB LED ;TURN OFF LED
CLR C
MAIN:
JNB TV,MAIN ;IF THERE IS NO COMMING DATA WAIT HERE
MOV RCV,P1 ;TAKE THE DATA FROM DATA BUS (D0-D7 OF HT648L)
ACALL WAIT
MOV A,RCV
SUBB A,#16H
JNZ EXIT ;EXIT IF THE DATA DOESNT MATCH
CLR LED ;TURN ON LED IF THE DATA IS EQUAL TO 16H
ACALL LONGWAIT
EXIT:
AJMP START



WAIT:
MOV R1,#0FFH
HERE:
DEC R1
MOV A,R1
JNZ HERE
RET

LONGWAIT:
MOV R1,#0FFH
LONG1:
MOV R2,#0FFH
LONG2:
DEC R2
MOV A,R2
JNZ LONG2
DEC R1
JNZ LONG1
RET

END