HI, I'm having trouble with my first xbee project. I have an app on the arduino that send a prompt to the pi over xbee, then waits for a command from the pi. The prompt is making it to the pi, but the data from the pi never makes it back to the arduino.
- Code: Select all
// Adafruit Motor shield library
// copyright Adafruit Industries LLC, 2009
// this code is public domain, enjoy!
#include <AFMotor.h>
int test_mode=1;
int live_mode=not(test_mode);
int speed=250;
AF_DCMotor left_motor(1);
AF_DCMotor right_motor(2);
void setup() {
Serial.begin(9600); // set up Serial library at 9600 bps
//Serial.println("Robot Controller");
}
void loop() {
Serial.print("cmd:");
execute();
delay(1000);
}
void execute() {
while(!Serial.available());
char cmd=Serial.read();
switch(cmd) {
case 'f':
if (live_mode) {
left_motor.run(FORWARD);
left_motor.setSpeed(speed);
right_motor.run(FORWARD);
right_motor.setSpeed(speed);
}
Serial.print("ok!");
break;
case 'b':
if (live_mode) {
left_motor.run(BACKWARD);
left_motor.setSpeed(speed);
right_motor.run(BACKWARD);
right_motor.setSpeed(speed);
}
Serial.print("ok!");
break;
case 'r':
if (live_mode) {
left_motor.run(FORWARD);
left_motor.setSpeed(speed);
right_motor.run(FORWARD);
right_motor.setSpeed(0);
}
Serial.print("ok!");
break;
case 'l':
if (live_mode) {
left_motor.run(FORWARD);
left_motor.setSpeed(0);
right_motor.run(FORWARD);
right_motor.setSpeed(speed);
}
Serial.print("ok!");
break;
default:
Serial.print("error!");
break;
}
if (live_mode) {
left_motor.run(RELEASE);
right_motor.run(RELEASE);
}
}
- Code: Select all
Linux raspberrypi 3.1.9adafruit+ #8 PREEMPT Wed Aug 1 18:02:42 EDT 2012 armv6l
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Type 'startx' to launch a graphical session
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Last login: Thu Aug 30 08:19:54 2012 from 192.168.1.114
pi@raspberrypi ~ ccdd pprroojjeeccttss
pi@raspberrypi ~/projects llss
robot.py test_serial.py test_udp.py
pi@raspberrypi ~/projects $ccaatt rroobboott..ppyy
import serial
ser=serial.Serial("/dev/ttyUSB0",19200)
ser=serial.Serial("/dev/ttyUSB0",9600)
while True:
prompt=""
while True:
ch=ser.read(1)
prompt+=ch
if ch == ":":
break
cmd=raw_input(prompt)
cmdx="%s\n" % cmd
print "sending " + cmdx
ser.write(cmdx)
if cmd=="e":
ser.close()
quit()
data=""
while True:
ch=ser.read(1)
print ch,
data+=ch
if ch=='!':
break
print data
pi@raspberrypi ~/projects $
pi@raspberrypi ~/projects $
pi@raspberrypi ~/projects $
pi@raspberrypi ~/projects $
pi@raspberrypi ~/projects $ nano robot.py
GNU nano 2.2.6 File: robot.py
import serial
ser=serial.Serial("/dev/ttyUSB0",19200)
ser=serial.Serial("/dev/ttyUSB0",9600)
while True:
prompt=""
while True:
ch=ser.read(1)
prompt+=ch
if ch == ":":
break
cmd=raw_input(prompt)
cmdx="%s\n" % cmd
print "sending " + cmdx
ser.write(cmdx)
if cmd=="e":
ser.close()
quit(
data=""
while True:
ch=ser.read(1)
print ch,
data+=ch
if ch=='!':
break
print data
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