Radio stops working

It appears the thread used to run the radio stops working periodically on my RPi Zero W. I spent some time this weekend testing a code change that appears to address the problem.

I moved the following code block in readSensors() within wirelessSensors.py to a separate function:

   p = Popen(cmd, stdout=PIPE, stderr=STDOUT, bufsize=1, close_fds=ON_POSIX)
   q = Queue()

   t = Thread(target=enqueue_output, args=('stdout', p.stdout, q))

   t.daemon = True  # thread dies with the program
   t.start() 
The new function is as follows:

def open_radio():

   p = Popen(cmd, stdout=PIPE, stderr=STDOUT, bufsize=1, close_fds=ON_POSIX)
   q = Queue()

   t = Thread(target=enqueue_output, args=('stdout', p.stdout, q))

   t.daemon = True  # thread dies with the program
   t.start()

   return q, t
The first code block above has been replaced with the following block:

q, t = open_radio()
Within the main WHILE loop, I added the following IF block:

while true:
   if not t.is_alive():
       q, t = open_radio()
Thanks,

Jason