def listSerialPorts():
	"""
	http://pyserial.readthedocs.io/en/latest/shortintro.html

	This calls the command line tool from pyserial to list the available
	serial ports.
	"""
	cmd = 'python -m serial.tools.list_ports'
	err, ret = commands.getstatusoutput(cmd)
	if not err:
		r = ret.split('\n')
		ret = []
		for line in r:
			if line.find('/dev/') >= 0:
				line = line.replace(' ', '')
				ret.append(line)
	return err, ret