Single port being disputed by multiple customers

Question

I am developing a solution for consuming a condominium box API in Nodejs, using the net library to make the communication. Our application makes direct communication with the condominium hardware and my biggest problem is that it provides only one door for communication (port 9001) and needs to be consumed by several clients ... The "single port" is a hardware constraint, so there are no ways to allocate other ports within the Guardhouse hardware, I need to find a way to develop on our side something that helps multiple customers consume the hardware data on that single port.

Follows the code of what has been developed so far:

//bibliotecas do node utilizadas:

let net 	= require("net");
let express = require('express');
let http    = require('http');
let cors    = require('cors');

let app         = express();
let server      = http.createServer(app);
let bodyParser  = require('body-parser');

app.use(cors());
app.options('*', cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser({limit: '800mb'}));

server.listen( 7979, function(){
    console.log("server listening to %j", server.address().port);
})
let client = net.createConnection(`9001`,`[link de acesso ao hardware]`)// Aqui o acesso é estabelecido na porta 9001 do hardware
	.on('error', (e) =>console.log('Erro de conexão', e));	


client.on("connect", function(data){
	console.log(`linear conectado porta: %j`, server.address().port);
});

client.on("data", function(data){
//Resposta da API	
});

client.on("end", function(data){
	console.log(`end: `);
	console.log(data);
});

app.get("/teste", (req, res) => {
//requisição feita pelo client
});

If there is a need I can provide more parts of the code (I believe this is enough because the biggest problem is the code of the variable 'client'). Does anyone know any solution?