i tried to use an asynchronic webserver for a new project with friends using this tutorial. We want to run an FFT while also changing some settings via the webserver. Since the tutorial only put code in the setup() i thought it would be good for performance.
When i just copy paste the code it works pretty ok, but then i wanted to change everything into classes like a good boy. Now i get this error:
In file included from sketch\webserver.cpp:2:0:
webserver.h:36:29: error: initializer-string for array of chars is too long [-fpermissive]
const char index_html[] = R"rawliteral(
sketch\webserver.cpp: In constructor 'webserver::webserver()':
webserver.cpp:4:22: error: initializer-string for array of chars is too long [-fpermissive]
webserver::webserver() {
I tried to search for a solution, but all the other problems with this type of error, didnt seem to fit with my problem.
This is the header file where the char string is declared
#ifndef webserver_h
#define webserver_h
#include "Arduino.h"
#include "ESPAsyncWebServer.h"
#include "AsyncTCP.h"
#include <WiFi.h>
class webserver {
private:
// Insert Private Variables And Functions
// Replace with your network credentials
const char* ssid = "ESP32-Todesstern";
const char* password = "CaptainHook";
const char* PARAM_INPUT_1 = "input1";
const char* PARAM_INPUT_2 = "input2";
const char* PARAM_INPUT_3 = "input3";
// Set web server port number to 80
AsyncWebServer server(int port);
// Variable to store the HTTP request
String header;
IPAddress IP;
//WiFiClient client;
public:
//Insert Public Variables and Functions
webserver();
String music_state;
const char index_html[] PROGMEM = R"rawliteral(
<!DOCTYPE HTML><html><head>
<title>ESP Input Form</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head><body>
<form action="/get">
input1: <input type="text" name="input1">
<input type="submit" value="Submit">
</form><br>
<form action="/get">
input2: <input type="text" name="input2">
<input type="submit" value="Submit">
</form><br>
<form action="/get">
input3: <input type="text" name="input3">
<input type="submit" value="Submit">
</form>
</body></html>
)rawliteral";
void setup_server(AsyncWebServer server);
void notFound(AsyncWebServerRequest *request);
};
#endif
Thanks for the Help,
Xenoshell
const char *index_html PROGMEM =There's nothing ESP32 or Arduino specific in nature of the question or solution(s). For what you're trying to do it would probably make sense to have it be static (more so if you really want an array for some reason) and defined outside the class or maybe using the newer inline variable feature. Or both declared and defined outside the class.