"Traffic Detected" Remote Unit

from machine import Pin
import time
import network
import socket
import gc
import machine

#Enable garbage collector
gc.enable()

#Host-Adress and Port of the Feeder (Port should be 30003)
HOST='192.168.178.73'
PORT=30003

#WLAN SSID and Password
wlan_ssid     = "YOUR SSID"
wlan_passwort = "YOUR WIFI PASSWORD"

#-------------------------------------------------

LED_Traffic = Pin(13, Pin.OUT)
LED_Traffic.off()
LED_WLAN = Pin(12, Pin.OUT)
LED_Traffic.off()
LED_WLAN.off()

WLAN_Error_Flag = False

#-------------------------------------------------

wlan = network.WLAN(network.STA_IF)

def wlan_connect():
    while not wlan.isconnected():
        print("Connecting to WIFI: " , wlan_ssid)
        start = time.ticks_ms();
        wlan.active(False)
        wlan.active(True);
        time.sleep(0.5)
        wlan.connect(wlan_ssid,wlan_passwort)
        while not wlan.isconnected() and start + 5000 > time.ticks_ms():
            pass

wlan_connect()

if wlan.isconnected():
    LED_WLAN.on()
    print("Connected to WIFI:  " , wlan_ssid)
    WLAN_Error_Flag = False

else:
    LED_WLAN.off()
    print("WLAN Connection to failed")
    WLAN_Error_Flag = True
    wlan_connect()

#-------------------------------------------------

if wlan.isconnected():
    sock = socket.socket()
    sock.settimeout(60)
    sock.connect((HOST, PORT))

print("Starting to listen to Port", PORT, "on Host" , HOST)
print("The blue LED is on in case of traffic is detected")

while 1:

    try:

        if not wlan.isconnected():
            print("WLAN ERROR - Reconnect")
            wlan = network.WLAN(network.STA_IF)
            WLAN_Error_Flag = True
            LED_WLAN.off()
            LED_Traffic.off()
            time.sleep(10)
            wlan_connect()

        if not WLAN_Error_Flag:
            Data = 0
            Data = sock.recv(8500)

            if not Data:
                LED_Traffic.off()
                time.sleep(10)
                sock.close()
                sock = socket.socket()
                sock.settimeout(60)
                sock.connect((HOST, PORT))

        LED_Traffic.on()
        time.sleep(0.5)
        LED_Traffic.off()

        gc.collect()

    except OSError as error :
        machine.reset()