ESP32 Forum

Posted: **Thu Sep 29, 2022 9:08 pm**

Hi,
Probably that question was asked. I couldn’t find what I was looking for.

In desperation, that’s what I’ve done, which works perfectly, but I have a very specific point.

I first looked for wifimanager. Ok, there are some, but many are bugged, do not work properly or request third-party libraries not compatible with my configuration.

This brings me to the configuration, precisely. Here, an ESP32-C3, with a compilation made on VSC PlatformIO and the Arduino environment. Much simpler for me, casual programmer.

I try above all to send a form (ok), and also to process the return information of this form. For example, pressing the "sent" button will return the fields to me as a POST method. That’s exactly what I can’t do. Perhaps you could help me.

A little code, certainly to show what I did:

platform.ini

Code: Select all

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:esp32-c3-devkitm-1]
platform = espressif32
board = esp32-c3-devkitm-1
framework = arduino
build_flags = 
	-DARDUINO_USB_MODE=1
	-DARDUINO_USB_CDC_ON_BOOT=1

MY.h

Code: Select all

/**
 * MyProject
 * 
 * This is the Myproject configuration system.
 * 
 * Version : 1.0.0
 * */

// GOIO REEL
#define IO0 0
#define IO1 1
#define IO2 2
#define IO3 3
#define IO4 4
#define IO5 5
#define IO6 6
#define IO7 7
#define IO8 8
#define IO9 9        // Boot / Led for default
#define IO10 10

main.cpp

Code: Select all

#include <Arduino.h>
#include <WiFi.h>
#include "MY.h"

#define LED IO10

const char*Wifi_ssid        = "exa";         // SSID of your Router OR mobile hotspot
const char*Wifi_password    = "Wel@In";     //  PASSWORD of your Router or Mobile hotspot see below example

const char *Apssid          = "MY_AP_CONFIG";    // give Accesspoint SSID, your esp's hotspot name 
const char *Appassword      = "my@essay";        // password of your esp's hotspot

const uint8_t ipPort        = 80;                   // Port du serveur web
String page;

Preferences prefs;
WiFiServer server(80);

void setup() {
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);

  Serial.begin(9600);

  WiFi.mode(WIFI_AP_STA);           // changing ESP9266 wifi mode to AP + STATION
  WiFi.softAP(Apssid, Appassword);         //Starting AccessPoint on given credential

  server.begin();

  /*
  // Connexion au routeur, si infos OK
  WiFi.begin(Wifi_ssid, Wifi_password);                  // to tell Esp32 Where to connect and trying to connect
  while (WiFi.status() != WL_CONNECTED) {                // While loop for checking Internet Connected or not
    delay(300);
    digitalWrite(LED, HIGH);
    delay(200);
    digitalWrite(LED, LOW);
    //Serial.print(".");
  }
  Serial.println("Config OK");
  */
}

void loop() {
  WiFiClient client = server.available();
  if (client) {
    String currentLine = "";
    while (client.connected()) {
      if (client.available()) {

        char c = client.read();
        if (c == '\n') {
          if (currentLine.length() == 0) {

            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();

            client.println("<html>");
            client.println("<head>");
            client.println("<title>Test MY</title>");

            client.println("<style>");
            client.println("body{font-size: 40px;}");
            client.println("form{font-size: 40px;}");
            client.println("</style>");

            client.println("</head>");
            client.println("<body>");
            client.println("<p>MY Test !</p>");

            client.println("<form method='POST'>");
            client.println("<input type='text' name='myvalue' value='myvalue'>");
            client.println("<input type='submit' name='save' value='Save'>");
            client.println("</form>");

            client.println("</body>");
            client.println("</html>");
            client.println();

            break;
          }
          else {
            currentLine = "";
          }
        }
        else if(c != '\r') {
          currentLine += c;
        }
      }
    }
    client.stop();
  }  
}

As you can see, I have simplified my code as much as possible. A field to fill and send.

If, by chance, someone could point me to a solution, a functional library that my current core has redesigned, I’m willing to give it a try.

Thank you very much for your attention.

ESP32 Forum

Html, form and POST on WiFiServer

Html, form and POST on WiFiServer