A timeout is missing in XBee API Python library

Question

I have a problem with this library: https://code.google.com/p/python-xbee/

There is the xbee.wait_read_frame() function without a timeout.

I am testing all serial ports for a signal, but if i cannot timout a try there is no way to do it.

Is there a posibility in Python to upgrade this function without editing the library? Or with small changes inside the library?

ports_available = []

for port in range(0,20):
    try:
        ser = serial.Serial(port, 9600)
        ports_available.append(port)
        ser.close()
    except:
        pass

print(ports_available)

for port in ports_available:
        ser = serial.Serial(port, 9600)
        bee = ZigBee(ser)
        bee.at(command=b"MY")
        print(bee.wait_read_frame()) #<----------
        ser.close()

Answer 1

Looks like you need to use the asynchronous mode described on page 3 of the documentation. It might be tricky unless the data frame includes a parameter for the serial port that received it. If it doesn't, you won't be able to connect the data to port that received it.

import serial
import time
from xbee import XBee

serial_port = serial.Serial('/dev/ttyUSB0', 9600)

def print_data(data): """
    This method is called whenever data is received
    from the associated XBee device. Its first and
    only argument is the data contained within the
    frame.
    """
    print data

xbee = XBee(serial_port, callback=print_data)

while True:
    try:
        time.sleep(0.001)
    except KeyboardInterrupt:
        break

xbee.halt()
serial_port.close()