Issue listening to a networked device.

[Will86]

Hi all,

I am trying to code a script to record what return a networked device.
I can connect to that device via RAW PuTTY. The device first return :

Output:
Connection Accepted

I have then to use my credential to be authorised on that device and can input the below :

U User
P Password
A

this provide me with the below confirmation :

Output:
<?xml version="1.0"?><Status Command="A"><State>AUTH_SUCCESS</State></Status>

What I am trying to achieve is to use a specific command from the device API providing any change of status in realtime.
The output has the below xml form and each time that device is being solicited, I can directly see on PuTTY what is going on :

Output:
</Status>
<?xml version="1.0"?><Status Command="J">
<Zone id="11" state="1"/>
<Zone id="12" state="1"/>
<Zone id="13" state="1"/>
<Zone id="14" state="1"/>
</Status>
<?xml version="1.0"?><Status Command="J">
<Zone id="21" state="1"/>
<Zone id="22" state="1"/>
</Status>
<?xml version="1.0"?><Status Command="J">
<Zone id="1" state="1"/>
<Zone id="2" state="1"/>
<Zone id="3" state="1"/>
<Zone id="4" state="1"/>
<Zone id="5" state="1"/>
<Zone id="6" state="1"/>
<Zone id="7" state="1"/>
<Zone id="8" state="1"/>
<Zone id="9" state="1"/>
</Status>

I would like to record this output on real-time and logging it in .csv file using python.
I have started the below code, but I struggle to get an ongoing return once the session is open and the first few exchanges for authentification done.

I guess I need to use something else than recv(), like listen() to get this returned value in realtime, but I cannot figure it out. Below if the latest working code. Any help would be really appreciated.

import socket
import time
import sys

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
HOST='172.18.0.45'
PORT='8020'
BUFF= 1024
user='KPI'
pwd='KPI'

PORT=int(PORT)

#return connection issue
try:
    s.connect((HOST, PORT))
except:
    print('Connection error')
    sys.exit

#def(VTP,arg) start an entire formula with whats below
user=str.encode('U '+ user +'\n\r')
pwd=str.encode('P '+ pwd +'\n\r')
ack=str.encode('A\n\r')
logVTP=str.encode('J ON\n\r')
s.send(user)
s.send(pwd)
s.send(ack)
data = s.recv(1024)
print ("received data:", data)
s.send(logVTP)
data = s.recv(1024)
print ("received data:", data)

s.close()