send a binary json message to a udp server in javascript

To send a binary JSON message to a UDP server in JavaScript, we need to first create the message in the correct format, then convert it into a binary buffer, and finally send it over the UDP socket.

Here is an example code snippet that demonstrates how to achieve this:

index.tsx
// create the message object
const messageObj = { 
  type: 'status', 
  data: { 
    temperature: 25, 
    humidity: 50 
  } 
};

// convert the message to binary format
const messageBuf = Buffer.from(JSON.stringify(messageObj), 'utf8');

// create the UDP socket
const dgram = require('dgram');
const socket = dgram.createSocket('udp4');

// send the message to the server
const serverPort = 1234;
const serverAddress = '127.0.0.1';
socket.send(messageBuf, 0, messageBuf.length, serverPort, serverAddress, (error, bytes) => {
  if (error) throw error;
  console.log(`Sent ${bytes} bytes to ${serverAddress}:${serverPort}`);
});
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In this code, we first create a message object using JSON. We then convert this object into a binary buffer with the help of the Buffer class. We then create a UDP socket using the dgram module and send the message buffer to the specified address and port.

You can modify the messageObj variable to contain your own data, and change the server address and port to match your requirements.