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MajicDesigns / MD_Parola

Library for modular scrolling LED matrix text displays
GNU Lesser General Public License v2.1
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Impossible to connect to the web page 192.168.1.XX with MD_PAROLA Scrolling and an ESP32 #70

Closed Gex31 closed 4 years ago

Gex31 commented 4 years ago

IMPORTANT

Before submitting this issue [ ] Have you tried using the latest version of the library? [ ] Have you checked this has not already been submitted and/or resolved? [ ] If you are requesting help a better choice may be the Arduino forum

Subject of the issue

Describe your issue here.

Your Environment

Library Version: MD_PAROLA 3.2.0 Arduino IDE version: 1.8.13 **Hardware model/type: ESPRESSIF ESP32-WROOM-32 IDE on Windows 10

Steps to Reproduce

Explain how to reproduce this issue. Please provide working code below to demonstrate the issue. When I test the exemple Simple Wifi Server, it works, I can connect to the web page.

But with MD_PAROLA Scrolling 8266 (I made little changes and rename it in "MD_PAROLA Scrollin ESP32 GEX") i Connect the wifi, but when i try to access the webpage I have a error message in the browser "ERR_EMPTY_RESPONSE" plus in french "Cette page ne fonctionne pas"

I try to change the wifi.h, but nothing change,

Please can you indicate me the way ?

Thanks a lot

Guillaume

Expected Behaviour

Explain what should happen. I want to enter a string on a web page to be displayed on the MAX7219 LED and manage the scrolling effects... That's the purpose of this library I believ..

Actual Behaviour

Explain what happens instead. Provide log messages if relevant. The serial moniteur shows we are connect to the Wifi :

18:38:53.736 -> ⸮⸮Q⸮"uD⸮7L6\⸮",⸮#L⸮h⸮⸮ܤ⸮⸮6H.#⸮i%""u⸮#"⸮f#"⸮:⸮#"⸮f#"⸮f"⸮⸮E⸮⸮?⸮⸮#"ĩEE⸮#⸮"⸮⸮E՜⸮T ⸮rE⸮⸮⸮"⸮#G⸮>u⸮G ⸮E⸮⸮⸮"⸮#⸮"f⸮+4⸮f #⸮c 18:38:54.573 -> WiFi connected. 18:38:54.608 -> IP address: 18:38:54.608 -> 192.168.43.251

Code Demonstrating the Issue

Insert your code here. // Use the Parola library to scroll text on the display // // Demonstrates the use of the scrolling function to display text received // from the serial interface // // User can enter text through a web browser and this will display as a // scrolling message on the display. Some parameters for the text can also // be controlled from the web page. // // IP address for the ESP8266 is displayed on the scrolling display // after startup initialisation and connected to the WiFi network. // // Connections for ESP8266 hardware SPI are: // Vcc 3v3 LED matrices seem to work at 3.3V // GND GND GND // DIN D7 HSPID or HMOSI // CS or LD D8 HSPICS or HCS // CLK D5 CLK or HCLK // // MD_MAX72XX library can be found at https://github.com/MajicDesigns/MD_MAX72XX //

//#include

include

include

include

include

// Turn on debug statements to the serial output

define DEBUG 0

if DEBUG

define PRINT(s, x) { Serial.print(F(s)); Serial.print(x); }

define PRINTS(x) Serial.print(F(x))

define PRINTX(x) Serial.println(x, HEX)

else

define PRINT(s, x)

define PRINTS(x)

define PRINTX(x)

endif

// Define the number of devices we have in the chain and the hardware interface // NOTE: These pin numbers are for ESO8266 hardware SPI and will probably not // work with your hardware and may need to be adapted

define HARDWARE_TYPE MD_MAX72XX::FC16_HW

define MAX_DEVICES 8

define CLK_PIN 18 // or SCK

define DATA_PIN 23 // or MOSI

define CS_PIN 5// or SS

//GEX //#define CLK_PIN D5 // or SCK //#define DATA_PIN D7 // or MOSI //#define CS_PIN D8 // or SS //GEX

// HARDWARE SPI MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES); // SOFTWARE SPI //MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

// WiFi login parameters - network name and password const char ssid = "Android GEX"; const char password = "XXXXXXXX";

// WiFi Server object and parameters WiFiServer server(80);

// Scrolling parameters uint8_t frameDelay = 25; // default frame delay value textEffect_t scrollEffect = PA_SCROLL_LEFT;

// Global message buffers shared by Wifi and Scrolling functions

define BUF_SIZE 512

char curMessage[BUF_SIZE]; char newMessage[BUF_SIZE]; bool newMessageAvailable = false;

const char WebResponse[] = "HTTP/1.1 200 OK\nContent-Type: text/html\n\n";

const char WebPage[] = "<!DOCTYPE html>" \ "" \ "" \ "MajicDesigns Test Page" \

"" \ "" \

"" \ "

MD_Parola set message

" \

"<form id=\"data_form\" name=\"frmText\">" \ "" \ "

" \ "<input type = \"radio\" name = \"Invert\" value = \"0\" checked> Normal" \ "<input type = \"radio\" name = \"Invert\" value = \"1\"> Inverse" \ "
" \ "<input type = \"radio\" name = \"ScrollType\" value = \"L\" checked> Left Scroll" \ "<input type = \"radio\" name = \"ScrollType\" value = \"R\"> Right Scroll" \ "

" \ "

const char *err2Str(wl_status_t code) { switch (code) { case WL_IDLE_STATUS: return("IDLE"); break; // WiFi is in process of changing between statuses case WL_NO_SSID_AVAIL: return("NO_SSID_AVAIL"); break; // case configured SSID cannot be reached case WL_CONNECTED: return("CONNECTED"); break; // successful connection is established case WL_CONNECT_FAILED: return("CONNECT_FAILED"); break; // password is incorrect case WL_DISCONNECTED: return("CONNECT_FAILED"); break; // module is not configured in station mode default: return("??"); } }

uint8_t htoi(char c) { c = toupper(c); if ((c >= '0') && (c <= '9')) return(c - '0'); if ((c >= 'A') && (c <= 'F')) return(c - 'A' + 0xa); return(0); }

void getData(char szMesg, uint16_t len) // Message may contain data for: // New text (/&MSG=) // Scroll direction (/&SD=) // Invert (/&I=) // Speed (/&SP=) { char pStart, *pEnd; // pointer to start and end of text

// check text message pStart = strstr(szMesg, "/&MSG="); if (pStart != NULL) { char *psz = newMessage;

pStart += 6;  // skip to start of data
pEnd = strstr(pStart, "/&");

if (pEnd != NULL)
{
  while (pStart != pEnd)
  {
    if ((*pStart == '%') && isdigit(*(pStart + 1)))
    {
      // replace %xx hex code with the ASCII character
      char c = 0;
      pStart++;
      c += (htoi(*pStart++) << 4);
      c += htoi(*pStart++);
      *psz++ = c;
    }
    else
      *psz++ = *pStart++;
  }

  *psz = '\0'; // terminate the string
  newMessageAvailable = (strlen(newMessage) != 0);
  PRINT("\nNew Msg: ", newMessage);
}

}

// check scroll direction pStart = strstr(szMesg, "/&SD="); if (pStart != NULL) { pStart += 5; // skip to start of data

PRINT("\nScroll direction: ", *pStart);
scrollEffect = (*pStart == 'R' ? PA_SCROLL_RIGHT : PA_SCROLL_LEFT);
P.setTextEffect(scrollEffect, scrollEffect);
P.displayReset();

}

// check invert pStart = strstr(szMesg, "/&I="); if (pStart != NULL) { pStart += 4; // skip to start of data

PRINT("\nInvert mode: ", *pStart);
P.setInvert(*pStart == '1');

}

// check speed pStart = strstr(szMesg, "/&SP="); if (pStart != NULL) { pStart += 5; // skip to start of data

int16_t speed = atoi(pStart);
PRINT("\nSpeed: ", P.getSpeed());
P.setSpeed(speed);
frameDelay = speed;

} }

void handleWiFi(void) { static enum { S_IDLE, S_WAIT_CONN, S_READ, S_EXTRACT, S_RESPONSE, S_DISCONN } state = S_IDLE; static char szBuf[1024]; static uint16_t idxBuf = 0; static WiFiClient client; static uint32_t timeStart;

switch (state) { case S_IDLE: // initialise PRINTS("\nS_IDLE"); idxBuf = 0; state = S_WAIT_CONN; break;

case S_WAIT_CONN: // waiting for connection { client = server.available(); if (!client) break; if (!client.connected()) break;

if DEBUG

char szTxt[20];
sprintf(szTxt, "%03d:%03d:%03d:%03d", client.remoteIP()[0], client.remoteIP()[1], client.remoteIP()[2], client.remoteIP()[3]);
PRINT("\nNew client @ ", szTxt);

endif

timeStart = millis();
state = S_READ;

} break;

case S_READ: // get the first line of data PRINTS("\nS_READ ");

while (client.available())
{
  char c = client.read();

  if ((c == '\r') || (c == '\n'))
  {
    szBuf[idxBuf] = '\0';
    client.flush();
    PRINT("\nRecv: ", szBuf);
    state = S_EXTRACT;
  }
  else
    szBuf[idxBuf++] = (char)c;
}
if (millis() - timeStart > 1000)
{
  PRINTS("\nWait timeout");
  state = S_DISCONN;
}
break;

case S_EXTRACT: // extract data PRINTS("\nS_EXTRACT"); // Extract the string from the message if there is one getData(szBuf, BUF_SIZE); state = S_RESPONSE; break;

case S_RESPONSE: // send the response to the client PRINTS("\nS_RESPONSE"); // Return the response to the client (web page) client.print(WebResponse); client.print(WebPage); state = S_DISCONN; break;

case S_DISCONN: // disconnect client PRINTS("\nS_DISCONN"); client.flush(); client.stop(); state = S_IDLE; break;

default: state = S_IDLE; } }

void setup() { Serial.begin(57600); PRINTS("\n[MD_Parola WiFi Message Display]\nType a message for the scrolling display from your internet browser");

P.begin(); P.displayClear(); P.displaySuspend(false);

P.displayScroll(curMessage, PA_LEFT, scrollEffect, frameDelay);

curMessage[0] = newMessage[0] = '\0';

// Connect to and initialise WiFi network PRINT("\nConnecting to ", ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) { PRINT("\n", err2Str(WiFi.status())); delay(500); } PRINTS("\nWiFi connected");

Serial.println(""); Serial.println("WiFi connected."); Serial.println("IP address: "); Serial.println(WiFi.localIP());

// Start the server server.begin(); PRINTS("\nServer started");

// Set up first message as the IP address sprintf(curMessage, "%03d:%03d:%03d:%03d", WiFi.localIP()[0], WiFi.localIP()[1], WiFi.localIP()[2], WiFi.localIP()[3]); PRINT("\nAssigned IP ", curMessage); }

void loop() { handleWiFi();

if (P.displayAnimate()) { if (newMessageAvailable) { strcpy(curMessage, newMessage); newMessageAvailable = false; } P.displayReset(); } }

MajicDesigns commented 4 years ago

There may be some elements of the JavaScript that gets sent that does not agree with your browser for whatever reason. I would initially try to simplify the message sent to a simple "Hello World" or similar type confirmation that you have loaded the page and your link works properly and then work up the complexity from there.

Gex31 commented 4 years ago

Hello, Thanks for your answer. I success to display a simple text with the serial monitor. I can also change the message with the IP adress to connected to. It works. The DHCP assign an IP adress well, ping is OK. But when I enter the IP adress in my brower (chrome) on my computer or smartphone, same problem : ERR_EMPTY_MESSAGE.

I can also display a web page with the micro controleur with others library, so I think my network is OK (firewall, security filters ok).

That's why I dont understand. I bought other types of ESP maybe is it the firmware/hardware ?

Thanks a lot if you have any idea..

Guillaume

MajicDesigns commented 4 years ago

The only thing I can think of is to print what is being sent at the ESP32 to the serial monitor to check that it is not an empty message. If you say a plain text message is received, then it is a matter of just trying to incrementally make the message bigger/more complicated to see if it stops working at come point, at which point the last change caused the issue.

Sorry I cannot be more help on this.

Gex31 commented 4 years ago

Hello, Thanks for your help. It works now with scrolling. But with french caracters like "ç" "é" è" "à" the display is with %^¨ and some things like this. I think it is in the webserver because it's the same on the web form : if I want an "é" it's false on the screen...

Have you any idea where i can select the right font ?

Thank you, Guillaume

MajicDesigns commented 4 years ago

I refer you to https://arduinoplusplus.wordpress.com/2020/03/21/parola-a-to-z-handling-non-ascii-characters-utf-8/

ve2cfb commented 2 years ago

Hello Guillaume, About your 2 Aug 2020 solution for the Web Page not working properly, Did you find a solution...?

Thank you, Pierre @Gex31