s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))

##Send new connection string and print the echoed reply
s.send(str)
data = s.recv(BUFFER_SIZE)
d = data.decode('ASCII')
print(d+'. Connected with:'+TCP_IP)

.
.
.

#Input file name from keyboard
name_of_file=input('Type file name:\n')
Name = os.path.join(save_path, name_of_file+".txt")         
#Name = os.path.join(name_of_file+".txt")         file:///C:/Users/29_06_60psiout_5.txt
file=open(Name, 'w', newline='')
filewriter = csv.writer(file)

.
.
.

BUFFER_SIZE = 20000

###Loop waiting for frames:
while 1:
    data = s.recv(BUFFER_SIZE)
    if not data: ##If empty frame is received break and close the connection from client side
        file.close() 
        break
    i=0
    for value in data:
        filewriter.writerow([i, value])
        i=i+1
    index=index+1   

s.close()##Shpuld frovide FIN flag from client side
#filewriter.writerow(['End'])


print('Connection closed:\n',datetime.datetime.now().strftime(fmt),'\n')