Made MD* libraries (Parola, MAX72XX) project specific, to be able to use the newest software version from github.
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// Use the Parola library to scroll text on the display
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//
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// Demonstrates the use of the scrolling function to display text received
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// from the serial interface
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//
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// User can enter text through a web browser and this will display as a
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// scrolling message on the display. Some parameters for the text can also
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// be controlled from the web page.
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//
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// IP address for the ESP8266 is displayed on the scrolling display
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// after startup initialisation and connected to the WiFi network.
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//
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// Connections for ESP8266 hardware SPI are:
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// Vcc 3v3 LED matrices seem to work at 3.3V
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// GND GND GND
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// DIN D7 HSPID or HMOSI
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// CS or LD D8 HSPICS or HCS
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// CLK D5 CLK or HCLK
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//
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// MD_MAX72XX library can be found at https://github.com/MajicDesigns/MD_MAX72XX
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//
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#include <ESP8266WiFi.h>
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#include <MD_Parola.h>
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#include <MD_MAX72xx.h>
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#include <SPI.h>
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// Turn on debug statements to the serial output
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#define DEBUG 0
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#if DEBUG
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#define PRINT(s, x) { Serial.print(F(s)); Serial.print(x); }
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#define PRINTS(x) Serial.print(F(x))
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#define PRINTX(x) Serial.println(x, HEX)
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#else
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#define PRINT(s, x)
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#define PRINTS(x)
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#define PRINTX(x)
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#endif
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// Define the number of devices we have in the chain and the hardware interface
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// NOTE: These pin numbers are for ESO8266 hardware SPI and will probably not
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// work with your hardware and may need to be adapted
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#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
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#define MAX_DEVICES 8
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#define CLK_PIN D5 // or SCK
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#define DATA_PIN D7 // or MOSI
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#define CS_PIN D8 // or SS
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// HARDWARE SPI
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MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
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// SOFTWARE SPI
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//MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
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// WiFi login parameters - network name and password
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const char* ssid = "";
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const char* password = "";
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// WiFi Server object and parameters
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WiFiServer server(80);
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// Scrolling parameters
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uint8_t frameDelay = 25; // default frame delay value
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textEffect_t scrollEffect = PA_SCROLL_LEFT;
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// Global message buffers shared by Wifi and Scrolling functions
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#define BUF_SIZE 512
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char curMessage[BUF_SIZE];
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char newMessage[BUF_SIZE];
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bool newMessageAvailable = false;
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const char WebResponse[] = "HTTP/1.1 200 OK\nContent-Type: text/html\n\n";
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char WebPage[] =
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"<!DOCTYPE html>" \
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"<html>" \
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"<head>" \
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"<title>MajicDesigns Test Page</title>" \
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"<script>" \
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"strLine = \"\";" \
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"function SendData()" \
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"{" \
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" nocache = \"/&nocache=\" + Math.random() * 1000000;" \
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" var request = new XMLHttpRequest();" \
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" strLine = \"&MSG=\" + document.getElementById(\"data_form\").Message.value;" \
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" strLine = strLine + \"/&SD=\" + document.getElementById(\"data_form\").ScrollType.value;" \
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" strLine = strLine + \"/&I=\" + document.getElementById(\"data_form\").Invert.value;" \
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" strLine = strLine + \"/&SP=\" + document.getElementById(\"data_form\").Speed.value;" \
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" request.open(\"GET\", strLine + nocache, false);" \
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" request.send(null);" \
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"}" \
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"</script>" \
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"</head>" \
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"<body>" \
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"<p><b>MD_Parola set message</b></p>" \
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"<form id=\"data_form\" name=\"frmText\">" \
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"<label>Message:<br><input type=\"text\" name=\"Message\" maxlength=\"255\"></label>" \
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"<br><br>" \
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"<input type = \"radio\" name = \"Invert\" value = \"0\" checked> Normal" \
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"<input type = \"radio\" name = \"Invert\" value = \"1\"> Inverse" \
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"<br>" \
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"<input type = \"radio\" name = \"ScrollType\" value = \"L\" checked> Left Scroll" \
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"<input type = \"radio\" name = \"ScrollType\" value = \"R\"> Right Scroll" \
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"<br><br>" \
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"<label>Speed:<br>Fast<input type=\"range\" name=\"Speed\"min=\"10\" max=\"200\">Slow"\
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"<br>" \
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"</form>" \
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"<br>" \
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"<input type=\"submit\" value=\"Send Data\" onclick=\"SendData()\">" \
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"</body>" \
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"</html>";
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char *err2Str(wl_status_t code)
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{
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switch (code)
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{
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case WL_IDLE_STATUS: return("IDLE"); break; // WiFi is in process of changing between statuses
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case WL_NO_SSID_AVAIL: return("NO_SSID_AVAIL"); break; // case configured SSID cannot be reached
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case WL_CONNECTED: return("CONNECTED"); break; // successful connection is established
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case WL_CONNECT_FAILED: return("CONNECT_FAILED"); break; // password is incorrect
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case WL_DISCONNECTED: return("CONNECT_FAILED"); break; // module is not configured in station mode
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default: return("??");
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}
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}
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uint8_t htoi(char c)
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{
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c = toupper(c);
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if ((c >= '0') && (c <= '9')) return(c - '0');
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if ((c >= 'A') && (c <= 'F')) return(c - 'A' + 0xa);
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return(0);
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}
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void getData(char *szMesg, uint8_t len)
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// Message may contain data for:
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// New text (/&MSG=)
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// Scroll direction (/&SD=)
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// Invert (/&I=)
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// Speed (/&SP=)
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{
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char *pStart, *pEnd; // pointer to start and end of text
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// check text message
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pStart = strstr(szMesg, "/&MSG=");
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if (pStart != NULL)
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{
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char *psz = newMessage;
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pStart += 6; // skip to start of data
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pEnd = strstr(pStart, "/&");
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if (pEnd != NULL)
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{
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while (pStart != pEnd)
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{
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if ((*pStart == '%') && isdigit(*(pStart + 1)))
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{
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// replace %xx hex code with the ASCII character
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char c = 0;
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pStart++;
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c += (htoi(*pStart++) << 4);
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c += htoi(*pStart++);
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*psz++ = c;
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}
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else
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*psz++ = *pStart++;
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}
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*psz = '\0'; // terminate the string
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newMessageAvailable = (strlen(newMessage) != 0);
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PRINT("\nNew Msg: ", newMessage);
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}
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}
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// check scroll direction
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pStart = strstr(szMesg, "/&SD=");
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if (pStart != NULL)
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{
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pStart += 5; // skip to start of data
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PRINT("\nScroll direction: ", *pStart);
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scrollEffect = (*pStart == 'R' ? PA_SCROLL_RIGHT : PA_SCROLL_LEFT);
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P.setTextEffect(scrollEffect, scrollEffect);
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P.displayReset();
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}
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// check invert
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pStart = strstr(szMesg, "/&I=");
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if (pStart != NULL)
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{
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pStart += 4; // skip to start of data
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PRINT("\nInvert mode: ", *pStart);
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P.setInvert(*pStart == '1');
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}
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// check speed
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pStart = strstr(szMesg, "/&SP=");
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if (pStart != NULL)
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{
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pStart += 5; // skip to start of data
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int16_t speed = atoi(pStart);
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PRINT("\nSpeed: ", P.getSpeed());
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P.setSpeed(speed);
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frameDelay = speed;
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}
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}
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void handleWiFi(void)
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{
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static enum { S_IDLE, S_WAIT_CONN, S_READ, S_EXTRACT, S_RESPONSE, S_DISCONN } state = S_IDLE;
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static char szBuf[1024];
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static uint16_t idxBuf = 0;
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static WiFiClient client;
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static uint32_t timeStart;
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switch (state)
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{
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case S_IDLE: // initialise
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PRINTS("\nS_IDLE");
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idxBuf = 0;
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state = S_WAIT_CONN;
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break;
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case S_WAIT_CONN: // waiting for connection
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{
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client = server.available();
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if (!client) break;
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if (!client.connected()) break;
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#if DEBUG
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char szTxt[20];
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sprintf(szTxt, "%03d:%03d:%03d:%03d", client.remoteIP()[0], client.remoteIP()[1], client.remoteIP()[2], client.remoteIP()[3]);
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PRINT("\nNew client @ ", szTxt);
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#endif
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timeStart = millis();
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state = S_READ;
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}
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break;
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case S_READ: // get the first line of data
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PRINTS("\nS_READ ");
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while (client.available())
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{
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char c = client.read();
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if ((c == '\r') || (c == '\n'))
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{
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szBuf[idxBuf] = '\0';
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client.flush();
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PRINT("\nRecv: ", szBuf);
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state = S_EXTRACT;
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}
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else
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szBuf[idxBuf++] = (char)c;
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}
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if (millis() - timeStart > 1000)
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{
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PRINTS("\nWait timeout");
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state = S_DISCONN;
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}
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break;
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case S_EXTRACT: // extract data
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PRINTS("\nS_EXTRACT");
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// Extract the string from the message if there is one
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getData(szBuf, BUF_SIZE);
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state = S_RESPONSE;
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break;
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case S_RESPONSE: // send the response to the client
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PRINTS("\nS_RESPONSE");
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// Return the response to the client (web page)
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client.print(WebResponse);
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client.print(WebPage);
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state = S_DISCONN;
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break;
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case S_DISCONN: // disconnect client
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PRINTS("\nS_DISCONN");
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client.flush();
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client.stop();
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state = S_IDLE;
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break;
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default: state = S_IDLE;
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}
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}
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void setup()
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{
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Serial.begin(57600);
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PRINTS("\n[MD_Parola WiFi Message Display]\nType a message for the scrolling display from your internet browser");
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P.begin();
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P.displayClear();
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P.displaySuspend(false);
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P.displayScroll(curMessage, PA_LEFT, scrollEffect, frameDelay);
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curMessage[0] = newMessage[0] = '\0';
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// Connect to and initialise WiFi network
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PRINT("\nConnecting to ", ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED)
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{
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PRINT("\n", err2Str(WiFi.status()));
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delay(500);
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}
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PRINTS("\nWiFi connected");
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// Start the server
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server.begin();
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PRINTS("\nServer started");
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// Set up first message as the IP address
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sprintf(curMessage, "%03d:%03d:%03d:%03d", WiFi.localIP()[0], WiFi.localIP()[1], WiFi.localIP()[2], WiFi.localIP()[3]);
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PRINT("\nAssigned IP ", curMessage);
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}
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void loop()
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{
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handleWiFi();
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if (P.displayAnimate())
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{
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if (newMessageAvailable)
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{
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strcpy(curMessage, newMessage);
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newMessageAvailable = false;
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}
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P.displayReset();
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}
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}
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