BlueSmirf hangs (included repro case)

Wireless & IoT
1

  1. Get the BlueSmirf,

  2. connect the RTD and CTS

  3. connect also the TX and RX so you’ll get back whatever you send.

  4. Get the python script below,

it just opens thread that loops on a routine that looks for incoming data and prints it out, after that it sends a write command

  1. Run the script, the first time you run it works fine:

Script output:

c:\test>serio.py
Connecting
Connected OK
Startign thread that reads from serial port
Send some data
Waiting
>
CONNECT,00081B83A8D5


--- exit ---

if I run it a second time the scripts is looping over and over on sending out the characteres

c:\tests>serio.py
Connecting
Connected OK
Startign thread that reads from serial port
Send some data

If I exit the script and try to use the HyperTerminal to double check I can also see that the BlueSmirf is not responding…

Below you’ll find the python script I have used, that it turns out to work fine with other serial and bluetooth devices as my nokia phone…

Please tell me what is going on!

Thanks

XChip

#please fix this line below, I had to add extra spaces otherwise the system wouldn't accept my post 
#/ usr / bin / env p y t h o n

import sys, os, serial, threading,  time

try:
    True
except NameError:
    True = 1
    False = 0

class Redirector:
    def __init__(self, seri):
        self.serial = seri

    def Start(self):
        """connect the serial port to the tcp port by copying everything
           from one side to the other"""
        self.alive = True
        self.thread_read = threading.Thread(target=self.reader)
        self.thread_read.setDaemon(1)
        self.thread_read.start()
        #self.writer()
    
    def reader(self):
        """loop forever and copy serial->socket"""
        while self.alive:
            try:
                data = self.serial.read(1)              #read one, blocking
                n = self.serial.inWaiting()             #look if there is more
                if n:
                    data = data + self.serial.read(n)   #and get as much as possible
                if data:
                    print ">", data
            except serial.SerialException, msg:
                print msg
                #probably got disconnected
                break
        self.alive = False
    
    def writer(self, data):
        self.serial.write(data)                 #get a bunch of bytes and send them


if __name__ == '__main__':
    
    ser = serial.Serial()
    
    ser.port    = 15
    ser.baudrate = 31250
    ser.rtscts  = False
    ser.xonxoff = False
    ser.timeout = 1     #required so that the reader thread can exit
    
    print "Connecting"
    try:
        ser.open()
    except serial.SerialException, e:
        print "Could not open serial port %s: %s" % (ser.portstr, e)
        sys.exit(1)

    print "Connected OK"

    print "Startign thread that reads from serial port"
    r = Redirector(ser)
    r.Start()
    
    print "Send some data"
    r.writer("Anyone there?")
    
    print "Waiting"
    time.sleep(4)

    print "\n--- exit ---"