Hello guys
I am not that fit in programming.
I want to use this display and I can't get it to work.
The order of the elements seems to be wrong.
Attached is the code I am using at the moment.
Also, here is a link where you can see the current state.
https://youtu.be/tsC1VOfgi_E
It runs on a WEMOS D1 Mini.
// 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 <ESP8266WiFi.h>
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#define USE_FC16_HW 1
// 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::PAROLA_HW
#define MAX_DEVICES 11
#define CLK_PIN 14 // or SCK
#define DATA_PIN 13 // or MOSI
#define CS_PIN 12 // or SS
// 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 = "bvxcbvxcb";
const char* password = "xvbxcvbxcvb";
// WiFi Server object and parameters
WiFiServer server(80);
// Scrolling parameters
uint8_t frameDelay = 50; // default frame delay value
textEffect_t scrollEffect = PA_SCROLL_RIGHT;
// 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>" \
"<html>" \
"<head>" \
"<title>MajicDesigns Test Page</title>" \
"<script>" \
"strLine = \"\";" \
"function SendData()" \
"{" \
" nocache = \"/&nocache=\" + Math.random() * 1000000;" \
" var request = new XMLHttpRequest();" \
" strLine = \"&MSG=\" + document.getElementById(\"data_form\").Message.value;" \
" strLine = strLine + \"/&SD=\" + document.getElementById(\"data_form\").ScrollType.value;" \
" strLine = strLine + \"/&I=\" + document.getElementById(\"data_form\").Invert.value;" \
" strLine = strLine + \"/&SP=\" + document.getElementById(\"data_form\").Speed.value;" \
" request.open(\"GET\", strLine + nocache, false);" \
" request.send(null);" \
"}" \
"</script>" \
"</head>" \
"<body>" \
"<p><b>MD_Parola set message</b></p>" \
"<form id=\"data_form\" name=\"frmText\">" \
"<label>Message:<br><input type=\"text\" name=\"Message\" maxlength=\"255\"></label>" \
"<br><br>" \
"<input type = \"radio\" name = \"Invert\" value = \"0\" checked> Normal" \
"<input type = \"radio\" name = \"Invert\" value = \"1\"> Inverse" \
"<br>" \
"<input type = \"radio\" name = \"ScrollType\" value = \"L\" checked> Left Scroll" \
"<input type = \"radio\" name = \"ScrollType\" value = \"R\"> Right Scroll" \
"<br><br>" \
"<label>Speed:<br>Fast<input type=\"range\" name=\"Speed\"min=\"10\" max=\"200\">Slow"\
"<br>" \
"</form>" \
"<br>" \
"<input type=\"submit\" value=\"Send Data\" onclick=\"SendData()\">" \
"</body>" \
"</html>";
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");
// 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();
}
}
Maybe someone can help me.
Kind regards
