kerong_command.py

import socket
import sys

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect the socket to the port where the server is listening
server_address = ('192.168.123.49', 5000)
print(sys.stderr, 'connecting to %s port %s' % server_address)
sock.connect(server_address)

try:
    sock.setblocking(True)
    # Send data
    # message = "02 00 31 03 36"
    arr = bytes.fromhex('02 00 31 03 36')
    print(len(arr))
    print(sys.stderr, 'sending "%s"' % arr)
    sock.send(arr)
    data = sock.recv(9)
    print(sys.stderr, 'received "%s"' % data)

    # Look for the response
    # amount_received = 0
    # amount_expected = len(arr)
    # print(amount_expected)
    # while amount_received < amount_expected:
    #     data = sock.recv(14)
    #     amount_received += len(data)
    #     print(sys.stderr, 'received "%s"' % data)

finally:
    print(sys.stderr, 'closing socket')
    sock.close()