ESP32 HTML send string back to server help

Projects Programming
1

I have a project using ESP32 and Arduino to set up a simple web server which works okay, using libraries:
#include <WebServer.h>
#include <WiFi.h>
But I'm a bit stuck with a seemingly simple problem; how do I get user input back to a string in the ESP32?
I have tried examples found online but can't get it to work. Something seems to be missing.
My code serves a web page with the following elements to try to get SSID from the user:
SSID
Save
which creates an input text box for the user to type into and a save button to send the string.
This displays correctly on a browser.

In the ESP32 Arduino code I have the following:

void handle_OnConnect(){                                                // this is called when home web page is requested
  LEDStatus = LOW;


  if(server.method() == HTTP_ANY) {      // try
    String ssid = server.arg("ssid");
    Serial.print("got value: ");
    Serial.println(ssid);
  }

  Serial.println("web request");
  server.send(200, "text/html", getMainPageHTML());
}

But this code never gets triggered. I don't believe my HTML code is causing the browser to send anything back to the server!
Does anybody have any tips or examples I that will help me figure this out?

2

I'd recommend using ESPAsyncWebServer on your ESP32

If you are trying only to provide a UI to collect connexion information, may be you'll like WiFiManager and its captive portal approach.

3

Thanks for the suggestions. If I was starting from scratch I would try them but my project is already well developed and I just need to add some method of getting user input back to the ESP32.

4

OK - I don't use WebServer.h

Have you looked at the examples?

5

I've looked at some, but there are so many examples I don't know where to start.
Can't find anything that addresses my issue.

6

I created a similar webserver using Nodemcu i can share the code if you want

7

that would be great. Thank you

8

Login code

9

Please take a look at: http://jurca.dyn.ts.si/

I'm using a different web server but client Javascript code should work just the same.

The server gets text from the client through the URL. If it is a complicated text it should be base64 encoded and the server should base63 decode it after receiving.