Example code for a neat OTA update ESP32 web server:

• Replace your credentials at line 11-12 in ota_example.ino
• Upload the code to your ESP32 with any C-based compiler.
• Then wait for it to boot.
• And go to esp32.local. On Windows you might need to install Apple's Bonjour Print Service to use mDNS.
• This is not a secure login, but partially obfuscated: username and password are program
• Click on "Login". You'll be sent to a URL. Make sure not to share it or let people access your browser history (if they have the URL, they can access the login, and upload programs).

• Outside of code
  • Make a new sketch like normal.
  • Copy ota.h and otaroute.h into your sketch's directory.
• Code, before setup
  • First, add these to the top of your code:

#include <WiFi.h>
#include <ESPmDNS.h>
#include <Update.h>
#include <WebServer.h>
#include "ota.h"

• Then, after that, make sure you declare these:

WebServer server(80);
const char* host = "esp32";
const char* ssid = "yourNetworkName";
const char* password = "yourNetworkPassword";

• Modify host and ssid
• Inside of setup
  • Set up WiFi and make sure you connect to it inside of your setup.
  • Also inside your setup, after that, do a #include "otaroute.h".
• Inside of loop
  • When you have spare time, call server.handleClient();. I have an example here waiting for 20ms each loop:

while (millis() - tt < 10) {
  server.handleClient();
}

• Or you can do it on a seperate core:

// Check for updates loop, outside of setup:
TaskHandle_t Task;
void handleServer(void * pvParameters) {
  while(true) {
    server.handleClient();
  }
}
// Inside of setup:
xTaskCreatePinnedToCore(
  handleServer,
  "handleServer",
  10000,
  NULL,
  1,
  &Task,
  (xPortGetCoreID() == 1) ? 0 : 1);

Remember to follow the above guidelines for creating a sketch. If you forget and upload a non-OTA capable sketch, you'll lose OTA access until another one with OTA is uploaded.

• First, make sure you're logged in:
  • Go to esp32.local. On Windows you might need to install Apple's Bonjour Print Service to use mDNS.
  • This is not a secure login, but partially obfuscated: username and password are program. (Feel free to fork and send a PR with more secure functionality!)
  • Click on "Login". You'll be sent to a URL. Make sure not to share it or let people access your browser history.
• Then build your sketch:
  • Arduino IDE:
    
  • Platform IO:
    • Choose compile
    • Once compiled, find .pio/build/your_build_name_here/
• Choose Choose File
• Select your .bin file
• Choose Upload
• Don't close the tab, and eventually it'll finish!

Any errors? Let me know.