Python Socket library TCP client to Node-Red TCP Server Node not working

[Open1333]

Hi,

I am trying to send Python TCP client message to Node-Red TCP Server Node.

I am using Python Socket library.

But however i am not able to receive the message in my Node-Red TCP in Server Node.
I am able to receive Python TCP client message to Python TCP Server via the Python Socket Library.

Please help.

[Open1333]

Below is my Python TCP Client Source code

import serial
import socket
import datetime
import time

def connect_to_serial_port(port="COM3", baud_rate=115200, timeout=1):
    ser = serial.Serial(port, baud_rate, timeout=timeout)
    return ser

def send_scpi_command(ser, command):
    ser.write(command.encode() + b'\n')

def read_scpi_response(ser):
    result = ser.readline().decode().strip('OK/nOK/nOK/n')
    final = result.split('ADC')
    num = float(final[0])
    num = int(num * 1000)
    return num

def measure_current(ser):
    scpi_cmd = "conf:curr"
    send_scpi_command(ser, scpi_cmd)
    print("Current configuration set.")
    time.sleep(1)  # 2-second interval
    scpi_cmd = "meas:show?"
    send_scpi_command(ser, scpi_cmd)

    response = read_scpi_response(ser)
    timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    print(f"[{timestamp}] Instrument response for current measurement: {response}")

    with open("instrument_log.txt", "a") as file:
        file.write(f"[{timestamp}] Current Measurement:  {response}\n")

def send_data_to_receiver(ip, port, response):
    sender_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    receiver_address = (ip, port)
    sender_socket.sendto(str(response).encode(), receiver_address)
    sender_socket.close()
    

def main():
    receiver_ip = "127.0.0.1"
    receiver_port = 139
    ser1 = connect_to_serial_port()
    print("Connected to the instruments.")
    
    try:
        while True:
            response1 = measure_current(ser1)
            #response2 = measure_current(ser2)
            
            #response2s = str(response2)
            send_data_to_receiver(receiver_ip, receiver_port, response1)
            #send_data_to_receiver(receiver_ip, receiver_port, response2s)
             # Add a delay between measurements
    except KeyboardInterrupt:
        pass  # Allow the user to exit the loop with Ctrl+C
    finally:
        ser1.close()
        
        

if __name__ == "__main__":
    main()

Node red Server node flow

[dceejay]

Ports below 1024 are privileged so you either need to run as root (not advised) or enable access to that port as a user, or choose a port > 1024.

[TotallyInformation]

I'd also say that it looks like you aren't doing anything with Python that Node-RED itself couldn't do? Do you really need/want the extra complexity?

[Open1333]

It has been solved, we are sending messages while using Python to listen, whereby we should only listen on only 1 device, and also port number we changed to > 1024.

Thank you!