Controlling PD with a socket

host.pd

#N canvas 116 315 450 300 12;
#X obj 48 90 route start stop;
#X obj 82 170 dac~;
#X obj 39 119 noise~;
#X obj 82 143 *~ 0;
#X msg 134 118 0, f 1;
#X msg 90 117 0.5;
#X obj 221 103 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
-1 -1;
#X text 160 42 0 for tcp \, see [help];
#X obj 48 63 netreceive 5005 0;
#X connect 0 0 5 0;
#X connect 0 1 4 0;
#X connect 2 0 3 0;
#X connect 3 0 1 0;
#X connect 3 0 1 1;
#X connect 4 0 3 1;
#X connect 5 0 3 1;
#X connect 8 0 0 0;
#X connect 8 0 6 0;

pd-client.js

// TCP https://gist.github.com/sid24rane/2b10b8f4b2f814bd0851d861d3515a10
const net = require("net");

const sleep = ms => new Promise(r => setTimeout(r, ms));

const sock = {host: "127.0.0.1", port: 5005};
const client = net.connect(sock, async () => {
  //console.log("connected to server!");
  client.write("start;\n");
  await sleep(5000);
  client.write("stop;\n");
  client.end();
});
client.on("end", () => {
  //console.log("disconnected from server");
});


// UDP https://gist.github.com/sid24rane/6e6698e93360f2694e310dd347a2e2eb
/*
const udp = require("dgram");
const buffer = require("buffer");
const client = udp.createSocket("udp4");
const data = Buffer.from("start;\n");

client.send(data, 5005, "localhost", err => {
  if (err) {
   console.error(erro);
  }

  client.close();
});
*/

pd_client.py

# https://stackoverflow.com/questions/24097175/pure-data-on-mac-os-x-how-to-send-messages/24886508#24886508
# https://stackoverflow.com/questions/61285324/how-to-send-messages-from-pure-data-to-python
# https://stackoverflow.com/questions/36563485/communicating-with-pure-data-in-c/36594153#36594153

import socket
from time import sleep

IP = "127.0.0.1"
PORT = 5005
addr = IP, PORT
EOL = ";\n"
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
#                                    or socket.SOCK_STREAM for TCP
#                                    which requires PD to use 0 instead of 1 for netreceive

msg = "start"
sock.sendto(bytes(msg + EOL, "utf-8"), addr)

sleep(5)
msg = "stop"
sock.sendto(bytes(msg + EOL, "utf-8"), addr)