Afonso Muralha / Pixels Camp LED matrix badge - Files

WiFi_Marquee_No-AP.ino
/*
Project: Wifi controlled LED matrix display without AP Mode - for attaching to local LAN.  Has wifi based setup on first run.
NodeMCU pins    -> EasyMatrix pins
MOSI-D7-GPIO13  -> DIN
CLK-D5-GPIO14   -> Clk
GPIO12-D6        -> LOAD

*/
#include <string.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Max72xxPanel.h>
#include <DNSServer.h>
#include <WiFiManager.h>
#include "FS.h"

// ******************* String form to sent to the client-browser ************************************
String form =
  "<p>"
  "<center>"
  "<h1>WiFi Marquee</h1>"
  "<form action='msg'><p>Type your message <input type='text' name='msg' size=100 autofocus> <input type='submit' value='Submit'></form>"
  "</center>";

ESP8266WebServer server(80);                             // HTTP server will listen at port 80
long period;
int rst = 5;    // set GPIO5 HIGH and reboot to clear WiFi creds
int rstVal;
int offset=1,refresh=0;
int pinCS = 12; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI )
int numberOfHorizontalDisplays = 8;
int numberOfVerticalDisplays = 1;
String decodedMsg;
String msg;
String testMsg = "";
Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);

String tape = "Arduino";
int wait = 25; // In milliseconds
int spacer = 2;
int width = 5 + spacer; // The font width is 5 pixels

/*
  handles the messages coming from the webbrowser, restores a few special characters and 
  constructs the strings that can be sent to the oled display
*/
void handle_msg() {
                        
  matrix.fillScreen(LOW);
  server.send(200, "text/html", form);    // Send same page so they can send another msg
  refresh=1;
  
  msg = server.arg("msg");

  decodedMsg = msg;
  // Restore special characters that are misformed to %char by the client browser
  decodedMsg.replace("+", " ");      
  decodedMsg.replace("%21", "!");  
  decodedMsg.replace("%22", "");  
  decodedMsg.replace("%23", "#");
  decodedMsg.replace("%24", "$");
  decodedMsg.replace("%25", "%");  
  decodedMsg.replace("%26", "&");
  decodedMsg.replace("%27", "'");  
  decodedMsg.replace("%28", "(");
  decodedMsg.replace("%29", ")");
  decodedMsg.replace("%2A", "*");
  decodedMsg.replace("%2B", "+");  
  decodedMsg.replace("%2C", ",");  
  decodedMsg.replace("%2F", "/");   
  decodedMsg.replace("%3A", ":");    
  decodedMsg.replace("%3B", ";");  
  decodedMsg.replace("%3C", "<");  
  decodedMsg.replace("%3D", "=");  
  decodedMsg.replace("%3E", ">");
  decodedMsg.replace("%3F", "?");  
  decodedMsg.replace("%40", "@"); 

  decodedMsg.toUpperCase();   // Had to convert the string to upper case.  weird shit happened with lower case.  Why?

  // Save decoded message to SPIFFS file for playback on power up.
  File f = SPIFFS.open("/msgf.txt", "w");
  if (!f) {
    Serial.println("File open failed!");
  } else {
    Serial.print("Entered Message was: ");
    Serial.print(decodedMsg);
  f.print(decodedMsg);
  }
  f.close();
}

void setup(void) {

pinMode(rst, INPUT);

  
matrix.setIntensity(5); // Use a value between 0 and 15 for brightness
matrix.setRotation(0,1);
matrix.setRotation(1,1);
matrix.setRotation(2,1);
matrix.setRotation(3,1);
matrix.setRotation(4,1);
matrix.setRotation(5,1);
matrix.setRotation(6,1);
matrix.setRotation(7,1);

// Adjust to your own needs
  matrix.setPosition(0, 0, 0); // The first display is at <0, 7>
  matrix.setPosition(1, 1, 0); // The second display is at <1, 0>
  matrix.setPosition(2, 2, 0); // The third display is at <2, 0>
  matrix.setPosition(3, 3, 0); // And the last display is at <3, 0>
  matrix.setPosition(4, 4, 0); // The first display is at <0, 7>
  matrix.setPosition(5, 5, 0); // The second display is at <1, 0>
  matrix.setPosition(6, 6, 0); // The third display is at <2, 0>
  matrix.setPosition(7, 7, 0); // And the last display is at <3, 0>


//ESP.wdtDisable();                               // used to debug, disable wachdog timer, 
  Serial.begin(115200);                           // full speed to monitor
  Serial.println();
  SPIFFS.begin();
  delay(3000);
  WiFiManager wifiManager;
  rstVal = digitalRead(rst);
  if(rstVal == HIGH) {
    Serial.println("RESET HAS BEEN CALLED");
    wifiManager.resetSettings();
    } else {
      Serial.println("CONNECTING TO NETWORK");
      wifiManager.autoConnect("WiFi Marquee");
    }
 
  
  // Set up the endpoints for HTTP server,  Endpoints can be written as inline functions:
  // replay to all requests with same HTML
  server.onNotFound([]() {
    server.send(200, "text/html", form);
  });
  server.on("/msg", handle_msg);
  server.begin();

// ***************** INITIAL READY & Read stored message from SPIFFS ****************
    File fr = SPIFFS.open("/msgf.txt", "r");
    while(fr.available()) {
    String line = fr.readStringUntil('n');
 //   Serial.println(line);
    decodedMsg = line;
    fr.close();
  }
  Serial.println("WebServer ready!   "); 
}


void loop(void) {

  for ( int i = 0 ; i < width * decodedMsg.length() + matrix.width() - 1 - spacer; i++ ) {
    //dnsServer.processNextRequest();
    server.handleClient();                        // checks for incoming messages
    if (refresh==1) i=0;
    refresh=0;
    matrix.fillScreen(LOW);

    int letter = i / width;
    int x = (matrix.width() - 1) - i % width;
    int y = (matrix.height() - 8) / 2; // center the text vertically
 
    while ( x + width - spacer >= 0 && letter >= 0 ) {
      if ( letter < decodedMsg.length() ) {
        matrix.drawChar(x, y, decodedMsg[letter], HIGH, LOW, 1);
      }

      letter--;
      x -= width;
    }

    matrix.write(); // Send bitmap to display

    delay(wait);
  }
}