Display Code
// Connections for ESP8266 hardware SPI are:
// Vcc 3v3 LED matrices seem to work at 3.3V
// GND GND GND
// CLK D5 CLK or HCLK
// DIN D7 HSPID or HMOSI
// CS or LD D8 HSPICS or HCS
#include <ESP8266WiFi.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#define DEBUG 0
#if DEBUG
#define PRINT(s, v) { Serial.print(F(s)); Serial.print(v); }
#define PRINTS(s) { Serial.print(F(s)); }
#else
#define PRINT(s, v)
#define PRINTS(s)
#endif
// Define the number of devices we have in the chain and the hardware interface
#define HARDWARE_TYPE MD_MAX72XX::ICSTATION_HW
#define MAX_DEVICES 8
#define CLK_PIN D5 // or SCK
#define DATA_PIN D7 // or MOSI
#define CS_PIN D8 // or SS
// SPI hardware interface
// Serial Peripheral Interface
MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// Arbitrary pins
//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
// Router connection details
// Access Point's name or SSID (Service Set IDentifier)
const char *ssid = "Display-Controller";
// Access Point's password
const char *password = "AnjenaRaja";
// Web Server object and parameters
// Port 80 is HTTP
// Hyper Text Transfer Protocol
WiFiServer server(80);
// Global message buffers shared by Wifi and Scrolling functions
const uint8_t MESG_SIZE = 255;
const uint8_t CHAR_SPACING = 1;
uint8_t SCROLL_DELAY = 50;
char curMessage[MESG_SIZE];
char newMessage[MESG_SIZE];
bool newMessageAvailable = false;
char WebResponse[] = "HTTP/1.1 200 OK\nContent-Type: text/html\n\n";
char WebPage[] =
"<!DOCTYPE html>" \
"<html>" \
"<head>" \
"<title>Display Control - Anjena Raja</title>" \
"<script>" \
"strLine = \"\";" \
"function SendText()" \
"{" \
" nocache = \"/&nocache=\" + Math.random() * 1000000;" \
" var request = new XMLHttpRequest();" \
" strLine = \"&MSG=\" + document.getElementById(\"txt_form\").Message.value;" \
" request.open(\"GET\", strLine + nocache, false);" \
" request.send(null);" \
"}" \
"</script>" \
"</head>" \
"<body>" \
"<p><b>Message</b></p>" \
"<form id=\"txt_form\" name=\"frmText\">" \
"<label>Msg:<input type=\"text\" name=\"Message\" maxlength=\"255\"></label><br><br>" \
"</form>" \
"<br>" \
"<input type=\"submit\" value=\"Send\" onclick=\"SendText()\">" \
"</body>" \
"</html>";
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);
}
boolean getText(char *szMesg, char *psz, uint8_t len)
{
boolean isValid = false; // text received flag
char *pStart, *pEnd; // pointer to start and end of text
// get pointer to the beginning of the text
pStart = strstr(szMesg, "/&MSG=");
if (pStart != NULL)
{
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
isValid = true;
}
}
String speed = "";
pStart = strstr(szMesg, "/&SPD=");
PRINT("\npStart=", pStart);
if (pStart != NULL)
{
pStart += 6; // skip to start of data
pEnd = strstr(pStart, "/&");
PRINT("\npEnd=", pEnd);
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++);
PRINT("\nC=", c);
}
else
{
speed += *pStart;
PRINT("\npStart=", *pStart);
*pStart++;
}
}
PRINT("\npSpeed=", speed);
SCROLL_DELAY = speed.toInt();
}
}
return(isValid);
}
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: // initialize
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
newMessageAvailable = getText(szBuf, newMessage, MESG_SIZE);
PRINT("\nNew Msg: ", newMessage);
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 scrollDataSink(uint8_t dev, MD_MAX72XX::transformType_t t, uint8_t col)
// Callback function for data that is being scrolled off the display
{
// we need this only to feed the data to the next line
// but we have a single line display and so we do not have to do anything
}
uint8_t scrollDataSource(uint8_t dev, MD_MAX72XX::transformType_t t)
// Callback function for data that is required for scrolling into the display
{
static enum { S_IDLE, S_NEXT_CHAR, S_SHOW_CHAR, S_SHOW_SPACE } state = S_IDLE;
static char *p;
static uint16_t curLen, showLen;
static uint8_t cBuf[8];
uint8_t colData = 0;
// finite state machine to control what we do on the callback
switch (state)
{
case S_IDLE: // reset the message pointer and check for new message to load
PRINTS("\nS_IDLE");
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;
}
state = S_NEXT_CHAR;
break;
case S_NEXT_CHAR: // Load the next character from the font table
PRINTS("\nS_NEXT_CHAR");
if (*p == '\0')
state = S_IDLE;
else
{
showLen = mx.getChar(*p++, sizeof(cBuf) / sizeof(cBuf[0]), cBuf);
curLen = 0;
state = S_SHOW_CHAR;
}
break;
case S_SHOW_CHAR: // display the next part of the character
PRINTS("\nS_SHOW_CHAR");
colData = cBuf[curLen++];
if (curLen < showLen)
break;
// set up the inter character spacing
showLen = (*p != '\0' ? CHAR_SPACING : (MAX_DEVICES*COL_SIZE)/2);
curLen = 0;
state = S_SHOW_SPACE;
// fall through
case S_SHOW_SPACE: // display inter-character spacing (blank column)
PRINT("\nS_ICSPACE: ", curLen);
PRINT("/", showLen);
curLen++;
if (curLen == showLen)
state = S_NEXT_CHAR;
break;
default:
state = S_IDLE;
}
return(colData);
}
void scrollText(void)
{
static uint32_t prevTime = 0;
// Is it time to scroll the text?
if (millis() - prevTime >= SCROLL_DELAY)
{
mx.transform(MD_MAX72XX::TSL); // scroll along - the callback will load all the data
prevTime = millis(); // starting point for next time
}
}
void setup()
{
#if DEBUG
Serial.begin(115200);
PRINTS("\n[WiFi Message Display]\nType a message for the scrolling display from your internet browser");
#endif
// Display initialization
mx.begin();
mx.control(MD_MAX72XX::INTENSITY, 0);
mx.control(MD_MAX72XX::UPDATE, MD_MAX72XX::ON);
mx.clear();
mx.setShiftDataInCallback(scrollDataSource);
mx.setShiftDataOutCallback(scrollDataSink);
curMessage[0] = newMessage[0] = '\0';
// this is the IP (Internet Protocol) address of my web server
IPAddress ip(192,168,1,24);
// this is the address of my gateway
// this is the end point and all communications stop at this address
IPAddress gateway(192,168,1,1);
IPAddress subnet(255,255,255,0);
// configure the access point's ip and gateway
WiFi.softAPConfig(ip, gateway, subnet);
// we need to secure the access point so that unauthorized users cannot connect to it
WiFi.softAP(ssid, password);
// Start the server
server.begin();
sprintf(curMessage, "%s", "I am Ready!");
}
void loop()
{
handleWiFi();
scrollText();
}
Display Router
// Anjena Raja - Individual Creativity Project
#include <ESP8266WiFi.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#define DEBUG 0
#if DEBUG
#define PRINT(s, v) { Serial.print(F(s)); Serial.print(v); }
#define PRINTS(s) { Serial.print(F(s)); }
#else
#define PRINT(s, v)
#define PRINTS(s)
#endif
// Define the number of devices we have in the chain and the hardware interface
#define HARDWARE_TYPE MD_MAX72XX::ICSTATION_HW
#define MAX_DEVICES 8
#define CLK_PIN D5 // or SCK
#define DATA_PIN D7 // or MOSI
#define CS_PIN D8 // or SS
// SPI hardware interface
MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// Arbitrary pins
//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
// Animation
// --------------------
// Constant parameters
//
#define ANIMATION_DELAY 75 // milliseconds
#define MAX_FRAMES 4 // number of animation frames
// ========== General Variables ===========
//
const uint8_t pacman[MAX_FRAMES][18] = // ghost pursued by a pacman
{
{ 0xfe, 0x73, 0xfb, 0x7f, 0xf3, 0x7b, 0xfe, 0x00, 0x00, 0x00, 0x3c, 0x7e, 0x7e, 0xff, 0xe7, 0xc3, 0x81, 0x00 },
{ 0xfe, 0x7b, 0xf3, 0x7f, 0xfb, 0x73, 0xfe, 0x00, 0x00, 0x00, 0x3c, 0x7e, 0xff, 0xff, 0xe7, 0xe7, 0x42, 0x00 },
{ 0xfe, 0x73, 0xfb, 0x7f, 0xf3, 0x7b, 0xfe, 0x00, 0x00, 0x00, 0x3c, 0x7e, 0xff, 0xff, 0xff, 0xe7, 0x66, 0x24 },
{ 0xfe, 0x7b, 0xf3, 0x7f, 0xf3, 0x7b, 0xfe, 0x00, 0x00, 0x00, 0x3c, 0x7e, 0xff, 0xff, 0xff, 0xff, 0x7e, 0x3c },
};
const uint8_t DATA_WIDTH = (sizeof(pacman[0])/sizeof(pacman[0][0]));
uint32_t prevTimeAnim = 0; // remember the millis() value in animations
int16_t idx; // display index (column)
uint8_t frame; // current animation frame
uint8_t deltaFrame; // the animation frame offset for the next frame
void resetMatrix(void)
{
mx.control(MD_MAX72XX::INTENSITY, 0);
mx.control(MD_MAX72XX::UPDATE, MD_MAX72XX::ON);
mx.clear();
}
void animationLoop(void)
{
static boolean bInit = true; // initialise the animation
// Is it time to animate?
if (millis()-prevTimeAnim < ANIMATION_DELAY)
return;
prevTimeAnim = millis(); // starting point for next time
mx.control(MD_MAX72XX::UPDATE, MD_MAX72XX::OFF);
// Initialize
if (bInit)
{
mx.clear();
idx = -DATA_WIDTH;
frame = 0;
deltaFrame = 1;
bInit = false;
// Lay out the dots
for (uint8_t i=0; i<MAX_DEVICES; i++)
{
mx.setPoint(3, (i*COL_SIZE) + 3, true);
mx.setPoint(4, (i*COL_SIZE) + 3, true);
mx.setPoint(3, (i*COL_SIZE) + 4, true);
mx.setPoint(4, (i*COL_SIZE) + 4, true);
}
}
// now run the animation
PRINT("\nINV I:", idx);
PRINT(" frame ", frame);
// clear old graphic
for (uint8_t i=0; i<DATA_WIDTH; i++)
mx.setColumn(idx-DATA_WIDTH+i, 0);
// move reference column and draw new graphic
idx++;
for (uint8_t i=0; i<DATA_WIDTH; i++)
mx.setColumn(idx-DATA_WIDTH+i, pacman[frame][i]);
// advance the animation frame
frame += deltaFrame;
if (frame == 0 || frame == MAX_FRAMES-1)
deltaFrame = -deltaFrame;
// check if we are completed and set initialise for next time around
bInit = (idx == mx.getColumnCount()+DATA_WIDTH);
mx.control(MD_MAX72XX::UPDATE, MD_MAX72XX::ON);
return;
}
// I am creating my own WiFi Access Point
// Access Point's name or SSID (Service Set IDentifier)
const char *ssid = "Mottu_Kottu";
// Access Point's password
const char *password = "AnjenaRaja";
// WiFi Server object and parameters
WiFiServer server(80);
// Global message buffers shared by Wifi and Scrolling functions
const uint8_t MESG_SIZE = 255;
const uint8_t CHAR_SPACING = 1;
uint8_t SCROLL_DELAY = 50;
char curMessage[MESG_SIZE];
char newMessage[MESG_SIZE];
bool newMessageAvailable = false;
char WebResponse[] = "HTTP/1.1 200 OK\nContent-Type: text/html\n\n";
char WebPage[] =
"<!DOCTYPE html>" \
"<html>" \
"<head>" \
"<title>Display Control</title>" \
"<script>" \
"strLine = \"\";" \
"function SendText()" \
"{" \
" nocache = \"/&nocache=\" + Math.random() * 1000000;" \
" var request = new XMLHttpRequest();" \
" strLine = \"&MSG=\" + document.getElementById(\"txt_form\").Message.value;" \
" request.open(\"GET\", strLine + nocache, false);" \
" request.send(null);" \
"}" \
"</script>" \
"</head>" \
"<body>" \
"<p><b>Type the Message</b></p>" \
"<form id=\"txt_form\" name=\"frmText\">" \
"<label>Msg:<input type=\"text\" name=\"Message\" maxlength=\"255\"></label><br><br>" \
"</form>" \
"<br>" \
"<input type=\"submit\" value=\"Send\" onclick=\"SendText()\">" \
"</body>" \
"</html>";
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);
}
boolean getText(char *szMesg, char *psz, uint8_t len)
{
boolean isValid = false; // text received flag
char *pStart, *pEnd; // pointer to start and end of text
// get pointer to the beginning of the text
pStart = strstr(szMesg, "/&MSG=");
if (pStart != NULL)
{
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
isValid = true;
}
}
String speed = "";
pStart = strstr(szMesg, "/&SPD=");
PRINT("\npStart=", pStart);
if (pStart != NULL)
{
pStart += 6; // skip to start of data
pEnd = strstr(pStart, "/&");
PRINT("\npEnd=", pEnd);
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++);
PRINT("\nC=", c);
}
else
{
speed += *pStart;
PRINT("\npStart=", *pStart);
*pStart++;
}
}
PRINT("\npSpeed=", speed);
SCROLL_DELAY = speed.toInt();
}
}
return(isValid);
}
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: // initialize
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
newMessageAvailable = getText(szBuf, newMessage, MESG_SIZE);
PRINT("\nNew Msg: ", newMessage);
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 scrollDataSink(uint8_t dev, MD_MAX72XX::transformType_t t, uint8_t col)
// Callback function for data that is being scrolled off the display
{
}
uint8_t scrollDataSource(uint8_t dev, MD_MAX72XX::transformType_t t)
// Callback function for data that is required for scrolling into the display
{
static enum { S_IDLE, S_NEXT_CHAR, S_SHOW_CHAR, S_SHOW_SPACE } state = S_IDLE;
static char *p;
static uint16_t curLen, showLen;
static uint8_t cBuf[8];
uint8_t colData = 0;
// finite state machine to control what we do on the callback
switch (state)
{
case S_IDLE: // reset the message pointer and check for new message to load
PRINTS("\nS_IDLE");
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;
}
state = S_NEXT_CHAR;
break;
case S_NEXT_CHAR: // Load the next character from the font table
PRINTS("\nS_NEXT_CHAR");
if (*p == '\0')
state = S_IDLE;
else
{
showLen = mx.getChar(*p++, sizeof(cBuf) / sizeof(cBuf[0]), cBuf);
curLen = 0;
state = S_SHOW_CHAR;
}
break;
case S_SHOW_CHAR: // display the next part of the character
PRINTS("\nS_SHOW_CHAR");
colData = cBuf[curLen++];
if (curLen < showLen)
break;
// set up the inter character spacing
showLen = (*p != '\0' ? CHAR_SPACING : (MAX_DEVICES*COL_SIZE)/2);
curLen = 0;
state = S_SHOW_SPACE;
// fall through
case S_SHOW_SPACE: // display inter-character spacing (blank column)
PRINT("\nS_ICSPACE: ", curLen);
PRINT("/", showLen);
curLen++;
if (curLen == showLen)
state = S_NEXT_CHAR;
break;
default:
state = S_IDLE;
}
return(colData);
}
void scrollText(void)
{
static uint32_t prevTime = 0;
// Is it time to scroll the text?
if (millis() - prevTime >= SCROLL_DELAY)
{
mx.transform(MD_MAX72XX::TSL); // scroll along - the callback will load all the data
prevTime = millis(); // starting point for next time
}
}
void setup()
{
#if DEBUG
Serial.begin(115200);
PRINTS("\n[Anjena Display]\nType a message for the scrolling display from your internet browser");
#endif
// Connect to and initialize WiFi network
PRINT("\nConnecting to ", ssid);
// this is the IP (Internet Protocol) address of my web server
IPAddress ip(192,168,1,24);
IPAddress gateway(192,168,1,1);
IPAddress subnet(255,255,255,0);
WiFi.config(ip, subnet, gateway);
WiFi.begin(ssid, password);
// Display initialization
mx.begin();
resetMatrix();
// play animation
prevTimeAnim = millis();
int counter = 2000;
while (counter > 0)
{
animationLoop();
delay(ANIMATION_DELAY/10);
counter--;
}
mx.setShiftDataInCallback(scrollDataSource);
mx.setShiftDataOutCallback(scrollDataSink);
curMessage[0] = newMessage[0] = '\0';
while (WiFi.status() != WL_CONNECTED)
{
PRINT("\n", err2Str(WiFi.status()));
delay(500);
}
PRINTS("\nWiFi connected");
// 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]);
sprintf(curMessage, "%s", "I am ready!");
}
void loop()
{
handleWiFi();
scrollText();
}