tcpClient.js

/** from: https://nodejs.org/api/net.html#net_net_createconnection_options_connectlistener */
const net = require('net');
const port = 3000;

const client = net.createConnection({ port: 3000 }, () => {
	console.log('connected to server!');
	//pipe immediately something back
	client.write('Hello from TCP client!\r\n');

	//send delayed data test
	setTimeout(()=>{
		console.log('sent!');
		client.write('and some delayed text.\r\n');
	}, 2000);
});

client.on('data', (data) => {
	console.log(data.toString());
	client.end();
});

client.on('end', () => {
	console.log('disconnected from server');
});

client.on('error',(err)=>{
	console.log(err);
});