Gateway broadcast for Pubnub

Broadcast.py

# importing pubnub libraries
from pubnub.pubnub import PubNub, SubscribeListener, SubscribeCallback, PNStatusCategory
from pubnub.pnconfiguration import PNConfiguration
from pubnub.exceptions import PubNubException
import pubnub
import serial
import json
import csv
import simplejson
import time

pnconf = PNConfiguration()                                           # pubnub_configuration_object
 
pnconf.publish_key = 'XXXXXXXXXXX'    # pubnub publish_key
pnconf.subscribe_key = 'XXXXXXXXXX'  # pubnub subscibe_key
pnconf.uuid = 'Gateway-device'

ser = serial.Serial(
    port= '/dev/ttyACM0',
    baudrate=115200,
    timeout=2.1
)
ser.flushInput()       
ser.write(b'\r\r')
time.sleep(0.5)
ser.write(b'\r\r')
ser.write(b'\r\r')
time.sleep(0.5)
ser.write(b'\r\r')
res=ser.read(10)
time.sleep(0.5)
ser.write(b'lep\r')

pubnub = PubNub(pnconf)                                            #  pubnub_object using pubnub_configuration_object
channel='Railway'                                                  #  pubnub channel_name
my_listener = SubscribeListener()                           # listner_object to read the msg from the Broker/Server
pubnub.add_listener(my_listener)                            # listner_object to pubnub_object to subscribe it
pubnub.subscribe().channels(channel).execute()              # subscribe the channel (Runs in background) 
my_listener.wait_for_connect()                              # wait for the listner_obj to connect to the Broker.Channel 
print('connected')                                          # print confirmation msg
#dumps_lines(objs = ser.realines())
data = ser.readlines()                                      # data to be published   
  
while True:

    pubnub.publish().channel(channel).message(data).sync()      
    result = my_listener.wait_for_message_on(channel)          
    print(result.message)