is there a difference in sending a serial command at setup and during loop?

Using Arduino Networking, Protocols, and Devices
5

Fair enough...

Here is the python script recieving the commands:

import RPi.GPIO as GPIO
import serial
import os
from subprocess import *

GPIO.setmode(GPIO.BOARD)
print "Setup pin 22"
GPIO.setup(22, GPIO.OUT)
GPIO.output(22, False)
serialport = serial.Serial("/dev/ttyAMA0",115200);
serialport.write("^Power&\n");

cmd = "ip addr show wlan0 | grep inet | awk '{print $2}' | cut -d/ -f1"
def run_cmd(cmd):
        p = Popen(cmd, shell=True, stdout=PIPE)
        output = p.communicate()[0]
        return output

def ret_ip():
        print "returning ip"
        ipaddr = run_cmd(cmd)
        serialport.write("^$wip");
        serialport.write(ipaddr);
        serialport.write("&\n");

while True:
        response = serialport.readline(None);
        response = response[0:2]
        print "response = " + response
        if response == "ip":
                print "if triggered"
                ipaddr = run_cmd(cmd)
                serialport.write("^$wip");
                serialport.write(ipaddr);
                serialport.write("&\n");

        if response == "SD":
                serialport.write("Shutdown recieved\n");
                os.system( "sudo shutdown -h now" )

        if response =="RB":
                serialport.write("reboot command rx")
                os.system("sudo reboot");

        if response == "VN":
                os.system("vncserver :1 -geometry 1300x700 -depth 24")

        if response == ("ST"):
                serialport.write("^Power&\n");

this code returns this:

response =

when the line Serial1.println("ST");
is executed