help in mickroC for PIC to PIC communication using RF 434MHz modules

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choura

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I'm using pic16f877a, crystal 4MHz with RF 434MHz but still doesn't working.
my program for Tx

void main()
{
TRISB = 0xFF;
PORTB = 0;
UART1_Init(9600); // Initialize UART module at 9600bps
Delay_ms(100); // Wait for UART module to stabilize
while (1)
{ // Endless loop
UART1_Write(PORTB); // and send data via UART
Delay_ms(500);
}
}


the second part of Rx is

void main()
{
TRISB = 0;
PORTB = 0;
UART1_Init(9600); // Initialize UART module at 9600bps
Delay_ms(100); // Wait for UART module to stabilize
while (1)
{ // Endless loop
if (UART1_Data_Ready())
{ // If data is received,
PORTB = UART1_Read(); // read the received data,
}
}
}

please help brothers
 

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  • my project n (4).JPG
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You have not pressed any buttons and hence PORTB of Transmitter is 0x00 and so PORTB of Rx is also 0x00. Zip and attach the proteus file and mikroC Code.
 

here the Proteus and hexes files in rar
 

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  • hexes files.rar
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sir can i use the RF434MHz because this what I have
 

thank you brother , I never forget your help for me

thank you
 

there is error when i uploaded the hex files to both microcontrollers
i have just uploaded the video for the project

- - - Updated - - -

the Rf speed is 4600bps
is this working correctly with the program
 

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  • Vidéo0004.rar
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If you used my code then you should not get the flickering of LED. See if Watch dog timer is resetting. Disable watchdog timer and it will work fine.

Try this version.
 

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  • RF 433 MHz v1.rar
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Last edited:

it still doesn't work when I removed the reset ( you mean here to remove R1 and R2 from +5v);
 

what is the wrong with power supply ?

i'm using the capacitor which used in the circuit you have seen
 

Filtering is needed otherwise there will be ripples in DC output. If you are using battery instead of transformer then there is no need of Capacitor.
 

i'm using battery of ultra power ACE with 9v

it can handle the circuit

i'm sorry for taking your time
 

Connect a led to pin RC0 and in the code just make pin RC0 high all the time. Do it for both the uCs. If led on RC0 blinks then watchdog timer is resetting.
 

it still lighting but very weak, what does mean that
 

I was mistake with led, I'm sorry for that, when I confirmed again the led always 0.
 

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