XBee: Difference between revisions
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tcsetattr(fd, TCSANOW, &newtio); | tcsetattr(fd, TCSANOW, &newtio); | ||
// Sending +++ within 1 second sets the XBee into command mode | |||
write(fd, "+++", 3); | write(fd, "+++", 3); | ||
Revision as of 20:45, 23 July 2011
Released Mar. 2010 | |
Documentation | |
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Datasheet | |
Product Manual | |
Mechanical Drawing | |
Digi International |
Overview
The XBee is a 802.15.4 compliant radio module. It connects to the boards using a UART, and several DIO pins. See your SBC manual for more information on the UART and DIO connection.
Getting Started
Digi offers the best introductions to this product. Many of these tutorials or samples are aimed at different platforms, but the UART information will still be relevant.
XBee 802.15.4 Digital Input/Output Line Passing
Programming Example
This source example assumes the baud rate is already set up to 9600 (required by command mode). Replace the XBEEDEVICE with your COM port.
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <stdio.h>
#include <strings.h>
#define XBEEDEVICE "/dev/pts/0"
int main(int argc, char **argv)
{
int fd, c, res;
struct termios oldtio, newtio;
char buf[255] = {0};
fd = open(XBEEDEVICE, O_RDWR | O_NOCTTY );
if(fd <0)
{
perror(XBEEDEVICE);
return -1;
}
tcgetattr(fd, &oldtio); /* save current port settings */
bzero(&newtio, sizeof(newtio));
newtio.c_cflag = CRTSCTS | CS8 | CLOCAL | CREAD;
newtio.c_iflag = IGNPAR;
newtio.c_oflag = 0;
/* set input mode (non-canonical, no echo,...) */
newtio.c_lflag = 0;
newtio.c_cc[VTIME] = 0; /* inter-character timer unused */
newtio.c_cc[VMIN] = 2; /* blocking read until 2 chars received */
tcflush(fd, TCIFLUSH);
tcsetattr(fd, TCSANOW, &newtio);
// Sending +++ within 1 second sets the XBee into command mode
write(fd, "+++", 3);
res = read(fd, buf, 255);
buf[res] = 0;
if(0 == strncmp(buf, "OK", 2))
{
printf("XBee Detected\n");
}
else
{
printf("Could not find XBee\n");
}
int i = 0;
for(i = 0; i < 254; i++)
{
if(buf[i] != 0)
printf("buf[%i]: %c\n", i, buf[i]);
}
tcsetattr(fd, TCSANOW, &oldtio);
return 0;
}