Send data from ESP32 to Processing via wifi - arduino

Question

I was trying to connect ESP32 (client)-Processing (server) and I think I made it work, but server doesn't receive or print anything. Why processing doesn't recognise when client is connected? I am new to Processing and trying to undrestand how it works.
Processing:
import processing.net.*;
Server myServer;
void setup() {
size(400, 400);
// Starts a myServer on port 5204
myServer = new Server(this, 5204);
println(Server.ip());
}
void serverEvent(Server someServer, Client someClient) {
println("We have a new client: " + someClient.ip());
}
ESP32:
#include <WiFi.h>
const char* ssid = "myNetwork";
const char* pass = "myPassword";
void setup()
{
Serial.begin(115200);
delay(10);
WiFi.begin(ssid,pass);
Serial.print("Connecting.");
while(WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.print("WiFi connected - IP address: ");
Serial.println(WiFi.localIP());
delay(500);
}
void loop()
{
const uint16_t port = 5204;
const char * host = "10.0.26.xx";
Serial.print("Connecting to ");
Serial.println(host);
// Use WiFiClient class to create TCP connections
WiFiClient client;
if (client.connect(host, port)){
Serial.println("Sending data"); // printed on serial monitor
client.print("Hello");
}
// This will send a request to the server
client.print("Send this data to the server");
Serial.println("Closing connection.");
client.stop();
}
EDITED
It gives the same prints even if I don't run the processing program. So is it connected somewhere else instead of the server?
At the processing I am getting only that "The value of parameter someServer is not used"

Answer 1

Well, I figured out. It was a firewall issue. I disable the firewall and then it worked. Also, before that I created a new rule for the Processing and the Port but for some reason it didn't work I don't undrestand why. Disabled it was the solution to my problem.

Answer 2

Your processing code is missing the part where you retrieve data from the client.
You need to add something like this:
void draw() {
// Get the next available client
Client thisClient = myServer.available();
// If the client is not null, and says something, display what it said
if (thisClient != null) {
String whatClientSaid = thisClient.readString();
if (whatClientSaid != null) {
println(thisClient.ip() + "t" + whatClientSaid);
}
}
}
Source
I don't see any other obvious issues but I cannot test something similar to your setup right now. Maybe you can give it a try.