arduino-esp32/libraries/HTTPUpdateServer/examples/WebUpdater/WebUpdater.ino

/*
  To upload through terminal you can use: curl -F "image=@firmware.bin" esp32-webupdate.local/update
*/

#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <ESPmDNS.h>
#include <HTTPUpdateServer.h>

#ifndef STASSID
#define STASSID "your-ssid"
#define STAPSK  "your-password"
#endif

const char* host = "esp32-webupdate";
const char* ssid = STASSID;
const char* password = STAPSK;

WebServer httpServer(80);
HTTPUpdateServer httpUpdater;

void setup(void) {

  Serial.begin(115200);
  Serial.println();
  Serial.println("Booting Sketch...");
  WiFi.mode(WIFI_AP_STA);
  WiFi.begin(ssid, password);

  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    WiFi.begin(ssid, password);
    Serial.println("WiFi failed, retrying.");
  }

  MDNS.begin(host);
  if (MDNS.begin("esp32")) {
    Serial.println("mDNS responder started");
  }


  httpUpdater.setup(&httpServer);
  httpServer.begin();

  MDNS.addService("http", "tcp", 80);
  Serial.printf("HTTPUpdateServer ready! Open http://%s.local/update in your browser\n", host);
}

void loop(void) {
  httpServer.handleClient();
}