lamegaton/esp_max_LED.ino

## esp_max_LED.ino
// credits to https://github.com/MajicDesigns/MD_MAX72XX

#include <ESP8266WiFi.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
//Declare hardware
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4

#define CLK_PIN   14 // or SCK
#define DATA_PIN  13 // or MOSI
#define CS_PIN    15 // or SS

// Global message buffers shared by Wifi and Scrolling functions
#define CHAR_SPACING  1 // pixels between characters

// Global message buffers shared by Serial and Scrolling functions
#define BUF_SIZE  75
char curMessage[BUF_SIZE];
char newMessage[BUF_SIZE];
bool newMessageAvailable = false;

uint16_t  scrollDelay;  // in milliseconds
MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
WiFiServer server(80); //Initialize the server on Port 80

char WebResponse[] = "HTTP/1.1 200 OK\nContent-Type: text/html\n\n";
char WebPage[] =
"<!DOCTYPE html>" \
"<html>" \
"<head>" \
"<title>Testing Button</title>" \
"</head>" \
"<br><input type=\"button\" name=\"b1\" value=\"Turn Left\" onclick=\"location.href='/left'\">" \
"<br><br><br>" \
"<input type=\"button\" name=\"b1\" value=\"Turn Right\" onclick=\"location.href='/right'\">" \
"<br><br><br>" \
"<input type=\"button\" name=\"b1\" value=\"Turn EM\" onclick=\"location.href='/em'\">" \
"</html>";

void scrollDataSink(uint8_t dev, MD_MAX72XX::transformType_t t, uint8_t col)
// Callback function for data that is being scrolled off the display
{
#if PRINT_CALLBACK
  Serial.print("\n cb ");
  Serial.print(dev);
  Serial.print(' ');
  Serial.print(t);
  Serial.print(' ');
  Serial.println(col);
#endif
}

uint8_t scrollDataSource(uint8_t dev, MD_MAX72XX::transformType_t t)
// Callback function for data that is required for scrolling into the display
{
  static char   *p = curMessage;
  static uint8_t  state = 0;
  static uint8_t  curLen, showLen;
  static uint8_t  cBuf[8];
  uint8_t colData;

  // finite state machine to control what we do on the callback
  switch(state)
  {
    case 0: // Load the next character from the font table
      showLen = mx.getChar(*p++, sizeof(cBuf)/sizeof(cBuf[0]), cBuf);
      curLen = 0;
      state++;

      // if we reached end of message, reset the message pointer
      if (*p == '\0')
      {
        p = curMessage;     // reset the pointer to start of message
        if (newMessageAvailable)  // there is a new message waiting
        {
          strcpy(curMessage, newMessage);  // copy it in
          newMessageAvailable = false;
        }
      }
      // !! deliberately fall through to next state to start displaying

    case 1: // display the next part of the character
      colData = cBuf[curLen++];
      if (curLen == showLen)
      {
        showLen = CHAR_SPACING;
        curLen = 0;
        state = 2;
      }
      break;

    case 2: // display inter-character spacing (blank column)
      colData = 0;
      if (curLen == showLen)
        state = 0;
      curLen++;
      break;

    default:
      state = 0;
  }

  return(colData);
}

 void scrollText(void)
{
  static uint32_t prevTime = 0;

  // Is it time to scroll the text?
  if (millis()-prevTime >= scrollDelay)
  {
    mx.transform(MD_MAX72XX::TSL);  // scroll along - the callback will load all the data
    prevTime = millis();      // starting point for next time
  }
}

void setup() {

WiFi.mode(WIFI_AP); //Our ESP8266-12E is an AccessPoint
WiFi.softAP("O", "123456789"); // Provide the (SSID, password); .
server.begin(); // Start the HTTP Server

Serial.begin(115200);

// Display initialization
mx.begin();
mx.setShiftDataInCallback(scrollDataSource);
mx.setShiftDataOutCallback(scrollDataSink);

strcpy(curMessage, "1010");
newMessage[0] = '\0';

IPAddress HTTPS_ServerIP = WiFi.softAPIP();//obtain the IP of the server
Serial.print("Server IP is: \n");
Serial.print(HTTPS_ServerIP);

}

void loop() {
  //Read what the browser has sent into a String class and print the request to the monitor
  WiFiClient client = server.available();//Gets a client that is connected to the server and has data available for reading.
  //String request = client.readString();
  String request1 = client.readStringUntil('\r');

  //Looking under the hood
  //Serial.println(request);
  //Serial.println(request1);
  if(request1.indexOf("/left")!= -1){//if it finds /left it will print yes
    Serial.println("send left babe");
    strcpy(curMessage, "<<<<");
    }
  else if(request1.indexOf("/right")!= -1){
    Serial.println("send right babe");
    strcpy(curMessage, ">>>>");
    }
  else if(request1.indexOf("/em")!= -1){
    Serial.println("send em");
    strcpy(curMessage, "ERR!");
    }

//    //HTML document
//  String s = "HTTP/1.1 200 OK\r\n";
//  s +="Connect-Type: text/html\r";
//  s +="<!DOCUMENT HTML>\r\n<html>\r\n";
//  s +="<br><input type=\"button\" name=\"b1\" value=\"Turn Left\" onclick=\"location.href='/left'\">";
//  s +="<br><br><br>";
//  s +="<input type=\"button\" name=\"b1\" value=\"Turn Right\" onclick=\"location.href='/right'\">";
//  s +="</html>\n" ;

  client.flush(); //clear all info
  client.print(WebResponse);
  client.print(WebPage);
  //Serial.println("Client disonnected"); //Looking under the hood
  scrollDelay = 0;
  scrollText();
 }
	// credits to https://github.com/MajicDesigns/MD_MAX72XX

	#include <ESP8266WiFi.h>
	#include <MD_MAX72xx.h>
	#include <SPI.h>
	//Declare hardware
	#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
	#define MAX_DEVICES 4

	#define CLK_PIN 14 // or SCK
	#define DATA_PIN 13 // or MOSI
	#define CS_PIN 15 // or SS

	// Global message buffers shared by Wifi and Scrolling functions
	#define CHAR_SPACING 1 // pixels between characters

	// Global message buffers shared by Serial and Scrolling functions
	#define BUF_SIZE 75
	char curMessage[BUF_SIZE];
	char newMessage[BUF_SIZE];
	bool newMessageAvailable = false;

	uint16_t scrollDelay; // in milliseconds
	MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
	WiFiServer server(80); //Initialize the server on Port 80

	char WebResponse[] = "HTTP/1.1 200 OK\nContent-Type: text/html\n\n";
	char WebPage[] =
	"<!DOCTYPE html>" \
	"<html>" \
	"<head>" \
	"<title>Testing Button</title>" \
	"</head>" \
	"<br><input type=\"button\" name=\"b1\" value=\"Turn Left\" onclick=\"location.href='/left'\">" \
	"<br><br><br>" \
	"<input type=\"button\" name=\"b1\" value=\"Turn Right\" onclick=\"location.href='/right'\">" \
	"<br><br><br>" \
	"<input type=\"button\" name=\"b1\" value=\"Turn EM\" onclick=\"location.href='/em'\">" \
	"</html>";

	void scrollDataSink(uint8_t dev, MD_MAX72XX::transformType_t t, uint8_t col)
	// Callback function for data that is being scrolled off the display
	{
	#if PRINT_CALLBACK
	Serial.print("\n cb ");
	Serial.print(dev);
	Serial.print(' ');
	Serial.print(t);
	Serial.print(' ');
	Serial.println(col);
	#endif
	}

	uint8_t scrollDataSource(uint8_t dev, MD_MAX72XX::transformType_t t)
	// Callback function for data that is required for scrolling into the display
	{
	static char *p = curMessage;
	static uint8_t state = 0;
	static uint8_t curLen, showLen;
	static uint8_t cBuf[8];
	uint8_t colData;

	// finite state machine to control what we do on the callback
	switch(state)
	{
	case 0: // Load the next character from the font table
	showLen = mx.getChar(*p++, sizeof(cBuf)/sizeof(cBuf[0]), cBuf);
	curLen = 0;
	state++;

	// if we reached end of message, reset the message pointer
	if (*p == '\0')
	{
	p = curMessage; // reset the pointer to start of message
	if (newMessageAvailable) // there is a new message waiting
	{
	strcpy(curMessage, newMessage); // copy it in
	newMessageAvailable = false;
	}
	}
	// !! deliberately fall through to next state to start displaying

	case 1: // display the next part of the character
	colData = cBuf[curLen++];
	if (curLen == showLen)
	{
	showLen = CHAR_SPACING;
	curLen = 0;
	state = 2;
	}
	break;

	case 2: // display inter-character spacing (blank column)
	colData = 0;
	if (curLen == showLen)
	state = 0;
	curLen++;
	break;

	default:
	state = 0;
	}

	return(colData);
	}

	void scrollText(void)
	{
	static uint32_t prevTime = 0;

	// Is it time to scroll the text?
	if (millis()-prevTime >= scrollDelay)
	{
	mx.transform(MD_MAX72XX::TSL); // scroll along - the callback will load all the data
	prevTime = millis(); // starting point for next time
	}
	}

	void setup() {

	WiFi.mode(WIFI_AP); //Our ESP8266-12E is an AccessPoint
	WiFi.softAP("O", "123456789"); // Provide the (SSID, password); .
	server.begin(); // Start the HTTP Server

	Serial.begin(115200);

	// Display initialization
	mx.begin();
	mx.setShiftDataInCallback(scrollDataSource);
	mx.setShiftDataOutCallback(scrollDataSink);

	strcpy(curMessage, "1010");
	newMessage[0] = '\0';

	IPAddress HTTPS_ServerIP = WiFi.softAPIP();//obtain the IP of the server
	Serial.print("Server IP is: \n");
	Serial.print(HTTPS_ServerIP);

	}

	void loop() {
	//Read what the browser has sent into a String class and print the request to the monitor
	WiFiClient client = server.available();//Gets a client that is connected to the server and has data available for reading.
	//String request = client.readString();
	String request1 = client.readStringUntil('\r');

	//Looking under the hood
	//Serial.println(request);
	//Serial.println(request1);
	if(request1.indexOf("/left")!= -1){//if it finds /left it will print yes
	Serial.println("send left babe");
	strcpy(curMessage, "<<<<");
	}
	else if(request1.indexOf("/right")!= -1){
	Serial.println("send right babe");
	strcpy(curMessage, ">>>>");
	}
	else if(request1.indexOf("/em")!= -1){
	Serial.println("send em");
	strcpy(curMessage, "ERR!");
	}

	// //HTML document
	// String s = "HTTP/1.1 200 OK\r\n";
	// s +="Connect-Type: text/html\r";
	// s +="<!DOCUMENT HTML>\r\n<html>\r\n";
	// s +="<br><input type=\"button\" name=\"b1\" value=\"Turn Left\" onclick=\"location.href='/left'\">";
	// s +="<br><br><br>";
	// s +="<input type=\"button\" name=\"b1\" value=\"Turn Right\" onclick=\"location.href='/right'\">";
	// s +="</html>\n" ;

	client.flush(); //clear all info
	client.print(WebResponse);
	client.print(WebPage);
	//Serial.println("Client disonnected"); //Looking under the hood
	scrollDelay = 0;
	scrollText();
	}