Communication between Arduino and Python via UDP

Projects Programming
1

Hi community,

I am struggling to build a communication bridge between Arduino and Python. Below is my code:

#include <mcp_can.h>
#include <SPI.h>
#include <SD.h>
#include <Ethernet2.h>
#include <EthernetUdp2.h>         // UDP library from: bjoern@cs.stanford.edu 12/30/2008

byte mac[] = {
  0xA8, 0x61, 0x0A, 0xAE, 0x2A, 0x12
};
IPAddress ip(127.0.0.1);

unsigned int localPort = 8880;      // local port to listen on

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;


void setup()
{

  
  Ethernet.begin(mac, ip);
  Udp.begin(localPort);
  Serial.begin(115200);

  }

void loop()
{

   char  ReplyBuffer[] = "acknowledged";    
    Udp.beginPacket(ip, localPort);
    Udp.write(ReplyBuffer);
    Udp.endPacket();

}

Below is the python code:

import serial
import time 
import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind(('127.0.0.1', 8880))
data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
sock.close()

I am getting suspicious of this ip adress '127.0.0.1' that I am sending the data to. If this is not the right adress, which one should I use?

2

127.0.0.1 is usually yourself, so it is probably wrong. Sorry, I do not know what would be correct.