Xbee and PIC RS232 communication

[thurmc]

xbee pic

I am trying to set up a pic to send and receive commands using the Xbee RF transceiver. I am able to output commands from one PIC and I observe them on the receive pin of the Xbee on the other PIC. My problem is that the communication is not being registered by the remote PIC. We checked the receive pin of the RS-232 on the PIC and it looks like the signal is being input correctly and is 5V. Can anyone tell me what might be wrong? My code is below.

#if defined(__PCM__)
#include <16F877.h>
#device *=16,ADC=8
#fuses HS, NOWDT, NOLVP, NOBROWNOUT, NOPROTECT, PUT
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#endif


char reply;

void main() {
reply = '0';
output_bit(PIN_E1, 0);
while(1) {
output_b((byte)reply);
reply = fgetc();
if(reply != '0') {
output_bit(PIN_E1, 1);
}


}
}

We also tried using an if(kbhit()) so that the PIC does not hang while waiting for a character but this is not working either (no kbhit() is being registered). Thanks for your help.

 

[udiday]

pic xbee

Hi, did you try 3.3V instead of 5V , i think the XBee can receive 3.3V only , think i saw someone with the same problem with aurdiano , that solved it by reducing the V

Added after 1 minutes:

check
**broken link removed**

 

[felis_CO]

xbee rs232

You may also want to look at this: https://www.circuitsathome.com/mcu/programming/playing-xbee. It's written for PIC18 but might give you some ideas as to how to troubleshoot.

 

[thothefali]

pic rs232

I am trying to set up a pic16f877 to send and receive commands using the Xbee RF transceiver,i used xbee series 2,at first i sent (atnd,atdb)from pic16f877 attached with coordenator to 3 end devic,
my application requierd to send these information to another local area network(xbee 2 also),if i use the same pic to send to the new area,the problem that this pic16f877 has only one UART(pin 25,26),if anyone can help me pliz or has any other sugestion to communicat between 2 local area network

Added after 15 minutes:

I am trying to set up a pic16f877 to send and receive commands using the Xbee RF transceiver,i used xbee series 2,at first i sent (atnd,atdb)from pic16f877 attached with coordenator to 3 end devic,
my application requierd to send these information to another local area network(xbee 2 also),if i use the same pic to send to the new area,the problem that this pic16f877 has only one UART(pin 25,26),if anyone can help me pliz or has any other sugestion to communicat between 2 local area network