Wifi Joystick ESP32 Arduino sketch (https://esp32.com/viewtopic.php?f=19&t=14803&p=57338#p57338)

wifi_joystick.ino

#include <Wire.h>
#include "SSD1306Wire.h"

SSD1306Wire display(0x3c, 5, 4);

#include "WiFi.h"
#include <WiFiMulti.h>

WiFiMulti WiFiMulti;
WiFiClient client;

const char * ssid = "AndroidAPhsw";
const char * password = "verySecret";

void draw(const String &s) {
  display.clear();
  display.drawStringMaxWidth(0, 0, 128, s);
  display.display();
}

void setup() {
  display.init();
  display.flipScreenVertically();
  display.setTextAlignment(TEXT_ALIGN_LEFT);
  display.setFont(ArialMT_Plain_16);

  delay(10);

  WiFiMulti.addAP(ssid, password);

  String line="Waiting for WiFi... ";
  draw(line);

  while(WiFiMulti.run() != WL_CONNECTED) {
    line += ".";
    draw(line);
    delay(500);
  }

  draw(String(WiFi.localIP()));

  delay(500);

  const uint16_t port = 1337;
  const char * host = "192.168.43.175";

  draw("Connecting to "+String(host)+":"+String(port));

  if (!client.connect(host, port)) {
    draw("Connection failed.");
    if (!client.connect(host, port+1)) {
      draw("Connection failed.");
      for(;;) {}
    }
  }
    
  draw("connected"); 
  delay(1000);   

  while (digitalRead(16) == 0) delay(100);
  char buf[1];
  client.write(buf[0]);    
}

void loop() {
  if (digitalRead(16) == 0)
  {
    draw("emergency stop triggered");
    for(;;)  {}
  }

  unsigned char buf[2] = {
    map(analogRead(36),0,4095,0,255),
    map(analogRead(39),0,4095,0,255)
  };
  
  client.write(buf, 2);
  draw(String(buf[0])+" : "+String(buf[1]));
  
  delay(5);
}