How send data from UNO R4 to windows (python)

Official Hardware UNO Family UNO R4 WiFi
8

Below is both a sketch and Python script to implement a simple UDP server residing on your PC and a client residing on the Arduino R4 WIFI.

Client Sketch

/*
  WiFi UDP Send data

  

*/
#include <WiFiS3.h>

int status = WL_IDLE_STATUS;
char ssid[] = "";      // your network SSID (name)
char pass[] = "";  // your network password (use for WPA, or use as key for WEP)
char remote_pc_ip[] = "192.168.1.231";
int keyIndex = 0;           // your network key index number (needed only for WEP)



char SendBuffer[] = "1";  // a string to send back

WiFiUDP Udp;


void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(115200);
  while (!Serial) {
    ;  // wait for serial port to connect. Needed for native USB port only
  }

  // check for the WiFi module:
  if (WiFi.status() == WL_NO_MODULE) {
    Serial.println("Communication with WiFi module failed!");
    // don't continue
    while (true)
      ;
  }

  String fv = WiFi.firmwareVersion();
  if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
    Serial.println("Please upgrade the firmware");
  }

  // attempt to connect to WiFi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);

    // wait 10 seconds for connection:
    delay(10000);
  }
  Serial.println("Connected to WiFi");

  Serial.println("\nStarting connection to server...");
  // if you get a connection, report back via serial:
  Udp.begin(50008);
}

void loop() {

  // if there's data available, read a packet

  // send a reply, to the IP address and port that sent us the packet we received
  Udp.beginPacket(remote_pc_ip, 50007);
  Udp.write(SendBuffer);
  Udp.endPacket();
  SendBuffer[0]++;
  delay(1000);
}

Before compiling and uploading, you must enter your SSID, password, and PC IP address at the top of the sketch.

Python Server

import socket

ServerSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
host = '0.0.0.0'
port = 50007

try:
    ServerSocket.bind((host, port))
except socket.error as e:
    print(str(e))


while True:
    data, address = ServerSocket.recvfrom(2048)
    data_str = data.decode('utf-8')
    try:

        # print(f"data : {data_str}, address : {address}")
        print(f'data received: {data_str}')

    except:
        print(f"invalid value, data : {data_str}, address : {address}")

    if not data:
        print("no data")
        break

connection.close()

No modifications are necessary for the server.

Start the server and then power up the Uno R4. The value should increase by one every second.

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