Arduino LED Bluetooth Matrix Display - 80x8 px - Ardumotive Arduino Greek Playground

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Εισαγωγή

Published date: 07/1/2020

Σε αυτόν τον οδηγό θα σας δείξω πως μπορείτε να φτιάξετε και εσείς το δικό σας LED Matrix Display !

Δυνατότητες:
- Ώρα
- Ημέρα
- Ημερομηνία
- Θερμοκρασία και υγρασία
- Κείμενο σε κύλιση
- Ρυθμιζόμενη Φωτεινότητα
- Επικοινωνία μέσω Bluetooth
- Αποθήκευση στην μνήμη

Τα υλικά που θα χρειαστούμε :

Σε αυτόν τον οδηγό θα χρειαστείτε :

Σχηματικό κυκλώματος

Παράγγειλε τώρα από το pcbway.com και κέρδισε 10 πλακέτες δωρεάν (ισχύει για τα καινούργια μέλη). Οδηγίες για το πως μπορείτε να πάρετε τη δική σας πλακέτα θα βρείτε στο βίντεο που βρίσκεται στην αρχή.

Επίσης μπορείτε να κάνετε τις δικές σας αλλαγές κάνοντας κλικ εδώ.

led_matrix_gerber_pcb.zip
File Size:	45 kb
File Type:	zip

Download File

Κώδικας

Συνδέουμε το TTL to USB module με το programming header όπως φαίνεται στο σχηματικό και περνάμε τον παρακάτω κώδικα.

/*  Arduino LED Matrix Display - 10x MAX7219 8x8 display-modules   *
 *  Pixels 80x8 - Digital Clock - Thermometer - Ticker             * 
 *  Dev: Michalis Vasilakis - Date: 19/10/19 - Ver. 2.0            * 
 *  Time, Date, Ticker Text and brightness level can be controlled * 
 *  from bluetooth module and computer-android application         */

//Libraries
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Max72xxPanel.h>
#include <dht.h>
#include <Wire.h>
#include <RTClib.h>
#include <SoftwareSerial.h>
#include <EEPROM.h>

//Constants
SoftwareSerial btSerial(A1, A0); // RX, TX
const int bt_state = A2;
const int photoCell = A3;
dht DHT;
const int DHT22_PIN = 9; // Data pin of DHT 22 (AM2302)
RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday","Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
const int pinCS = 10; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI )
const int numberOfHorizontalDisplays = 10;
const int numberOfVerticalDisplays = 1;
const int wait = 20; // In milliseconds
const int spacer = 1;
const int width = 5 + spacer; // The font width is 5 pixels
Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);
const int buzzer = 7;
//Variables
int chk, length, brLevel, photoCellValue, count=0;
float hum, temp;
String msg;
boolean autoBR=true;
boolean messageCompleted=false;
boolean newMessage=false;
String tickerText = "www.Ardumotive.com - Made in Greece!";
char incomingByte; 
String command;
unsigned long previousMillis = 0;        // will store last time LED was updated
boolean flag=false;
int RES=0;

void setup() {
  //writeStringEEPROM(10,"AAA");
  Serial.begin(9600);
  brLevel = EEPROM.read(0);
  autoBR = EEPROM.read(1);
  tickerText = readStringEEPROM(10);
  
  Serial.println("BR LEVEL: "+String(brLevel));
  Serial.println("AUTO BR: "+String(autoBR));
  Serial.println("TEXT: "+tickerText);
  btSerial.begin(9600);
  rtc.begin();
  //rtc.adjust(DateTime(2017, 03, 21, 19, 47, 0));   // <----------------------SET TIME AND DATE: YYYY,MM,DD,HH,MM,SS
  matrix.setIntensity(1); // Use a value between 0 and 15 for brightness
  // Adjust to your own needs
  delay(100);
 /*
  matrix.setPosition(0, 9, 0); // The first display is at <0, 0>
  matrix.setPosition(1, 8, 0); // The second display is at <1, 0>
  matrix.setPosition(2, 7, 0); // The third display is at <2, 0>
  matrix.setPosition(3, 6, 0); // And the last display is at <3, 0>
  matrix.setPosition(4, 5, 0); // And the last display is at <3, 0>
  matrix.setPosition(5, 4, 0); // And the last display is at <3, 0>
  matrix.setPosition(6, 3, 0); // And the last display is at <3, 0>
  matrix.setPosition(7, 2, 0); // And the last display is at <3, 0>
  matrix.setPosition(8, 1, 0); // And the last display is at <3, 0>
  matrix.setPosition(9, 0, 0); // And the last display is at <3, 0>
*/
}
void(* resetFunc) (void) = 0;
void loop() {
  unsigned long currentMillis = millis();
  communication();
  //Update thermometer and photoCell variables and on starting
  if (count==0){
    chk = DHT.read22(DHT22_PIN);
    delay(20);
    //Read data and store it to variables hum and temp
    hum = DHT.humidity;
    temp= DHT.temperature;
    controlBR();
  }
  //Show content 
  if (currentMillis - previousMillis >= 1000) {
    previousMillis = currentMillis;
    count++; //Seconds
  }
  //First display the clock for 5sec
  if (count>=0 && count <5){
    time();
    flag=false;
  }
  //Then the day of the week for 3sec
  else if (count>=5 && count<7){
    if (!flag){
      today();
      flag=true;
    }
  }
  //Then the date for 3sec
  else if (count>=7 && count<11){
    if (count==7) {flag=false;}
    if (!flag){
      date();
      flag=true;
    }
  }
  //Then the temperature for 3sec
  else if (count>=11 && count<14){
    if (count==11) {flag=false;}
    if (!flag){
      temperature();
      flag=true;
    }
  }
  //Then the humidity for 3sec
  else if (count>=14 && count<17){
    if (count==14) {flag=false;}
    if (!flag){
      humidity();
      flag=true;
    }
  }
  //Finally the ticker text
  else if (count>=17){
    if(tickerText!=""){
      scroll();
      fullOff();
      delay(100);
    }
    //RESET ARDUINO -- THIS WILL FIX SOME DISPLAY PROBLEMS
    if (RES==5){
      matrix.shutdown(true);
      resetFunc();
    }
    RES++;
    count=0; //<----reset
  }
}
//Bluetooth communication
void communication(){
  
  if (btSerial.available()){
    incomingByte = btSerial.read();
    if(incomingByte=='>'){
       messageCompleted=true;
       newMessage=false;
    }
    else if (incomingByte=='<'){
       newMessage=true;
    }

    if (newMessage){
       command.concat(incomingByte);
    }
  }
  
  
  if(messageCompleted){
    //Brightness level
    if (command.charAt(1)=='B'){
      if (command.substring(2)=="Auto"){
        autoBR=true;
      }
      else{
        autoBR=false;
        brLevel= (command.substring(2)).toInt() - 1; 
      }
      EEPROM.write(0, brLevel);
      EEPROM.write(1, autoBR);
      tone(buzzer,800,500);
      controlBR();
    }
    //Update clock
    else if (command.charAt(1)=='T'){
      int h = (command.substring(2,4)).toInt();
      int m = (command.substring(5,7)).toInt();
      int s = (command.substring(8,10)).toInt();
      int D = (command.substring(11,13)).toInt();
      int M = (command.substring(14,16)).toInt();
      int Y = (command.substring(17,21)).toInt();
      rtc.adjust(DateTime(Y,M,D,h,m,s)); // <----------------------SET TIME AND DATE: YYYY,MM,DD,HH,MM,SS
      tone(buzzer,800,500);
    }
    //Update ticker text
    else if (command.charAt(1)=='t'){
      tickerText=command.substring(2);   
      tone(buzzer,800,500);
      writeStringEEPROM(10,tickerText);  
    }
    command="";
    messageCompleted=false;
  }
}
void writeStringEEPROM(char addr,String data)
{
  int _size = data.length();
  int i;
  for (i = 0; i < _size; i++)
  {
    EEPROM.write(addr + i, data[i]);
  }
  EEPROM.write(addr + _size, '\0'); //Add termination null character for String Data
}
String readStringEEPROM(char add)
{
  int i;
  char data[500]; //Max 100 Bytes
  int len=0;
  unsigned char k;
  k=EEPROM.read(add);
  while(k != '\0' && len<500)   //Read until null character
  {    
    k=EEPROM.read(add+len);
    data[len]=k;
    len++;
  }
  data[len]='\0';
  return String(data);
}
//Control brightness - It will run on every complete loop!
void controlBR(){
  if (autoBR){
    photoCellValue = analogRead(photoCell);
    Serial.println(photoCellValue);
    photoCellValue = map(photoCellValue,1023,0,0,15); 
    matrix.setIntensity(photoCellValue); // Use a value between 0 and 15 for brightness
  }
  else{
    matrix.setIntensity(brLevel); // Use a value between 0 and 15 for brightness
  }
}
//Print time
void time(){
   DateTime now = rtc.now();
   int HH = now.hour();
   int MM = now.minute();
   int SS = now.second();
   if (HH<10){
     msg = "0" + String(HH) + ":"; 
   }
   else{
     msg = String(HH) + ":";
   }
   if (MM<10){
     msg += "0" + String(MM) + ":";
   }
   else{
     msg += String(MM) + ":";
   }
   if (SS<10){
     msg += "0" + String(SS);
   }
   else{
     msg += String(SS);
   }
   length = msg.length() * width;
   //fill with blank spaces the rest of the display area
   for (int i = numberOfHorizontalDisplays*8-length; i>0; i--){
     msg += " ";
   }
   matrix.setCursor((numberOfHorizontalDisplays*8-length)/2,0); // Center text 
   matrix.fillScreen(LOW);
   matrix.print(msg);
   matrix.write();
}
//Print day of week
void today(){
  DateTime now = rtc.now();
  //Day of week
  msg = daysOfTheWeek[now.dayOfTheWeek()];
  length = msg.length() * width;
  //fill with blank spaces the rest of the display area
  for (int i = 8; i>0; i--){
    msg += " ";
  }
  matrix.setCursor((numberOfHorizontalDisplays*8-length)/2,0); // Center text 
  matrix.fillScreen(LOW);
  matrix.print(msg);
  matrix.write();
}
//Print date
void date(){
  DateTime now = rtc.now();
  //Date:
  int dd = now.day();
  int mm = now.month();
  int yyyy = now.year();
  if (dd<10){
    msg = "0" + String(dd) + ":"; 
  }
  else{
    msg = String(dd) + ":";
  }
  if (mm<10){
    msg += "0" + String(mm) + ":";
  }
  else{
    msg += String(mm) + ":";
  }
  msg += String(yyyy);
  length = msg.length() * width;
  //fill with blank spaces the rest of the display area
  for (int i = 8; i>0; i--){
    msg += " ";
  }
  matrix.setCursor((numberOfHorizontalDisplays*8-length)/2,0); // Center text 
  matrix.fillScreen(LOW);
  matrix.print(msg);
  matrix.write();
}
//Print temp and humidity
void temperature() {
    msg = "Temp: " + String(temp) +"oC";
    length = msg.length() * width;
    //fill with blank spaces the rest of the display area
    for (int i = 8; i>0; i--){
      msg += " ";
    }
    matrix.setCursor((numberOfHorizontalDisplays*8-length)/2,0); // Center text 
    matrix.fillScreen(LOW);
    matrix.print(msg);
    matrix.write();
}
void humidity(){
    msg = "Hum: " + String(hum) +"%";
    length = msg.length() * width;
    //fill with blank spaces the rest of the display area
    for (int i = 8; i>0; i--){
      msg += " ";
    }
    matrix.setCursor((numberOfHorizontalDisplays*8-length)/2,0); // Center text 
    matrix.fillScreen(LOW);
    matrix.print(msg);
    matrix.write();
}

//Ticker Text
void scroll(){
  for ( int i = 0 ; i < width * tickerText.length() + matrix.width() - 1 - spacer; i++ ) {

    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 < tickerText.length() ) {
        matrix.drawChar(x, y, tickerText[letter], HIGH, LOW, 1);
      }

      letter--;
      x -= width;
    }

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

    delay(wait);
  }
}
//Control funcs. for display - Call them in void loop to test the LEDs
void fullOn(){
  matrix.fillScreen(HIGH);
  matrix.write();
}
void fullOff(){
  matrix.fillScreen(LOW);
  matrix.write();
}

Κατεβάστε τον κώδικα απ' εδώ και ανοίξτε το αρχείο με το Arduino IDE. Μέσα θα βρείτε όλες τις απαραίτητες βιβλιοθήκες.

led_matrix_display.zip
File Size:	363 kb
File Type:	zip

Download File

Gallery

Κουτί

Χρησιμοποιήστε ασπρόμαυρο plexiglass πάχους 3mm:

2τεμ 33x4 cm
2τεμ 33x6 cm
2pτεμ 6.6x4.6 cm (left and right)

Προαιρετικά , αν έχετε 3D εκτυπωτή εκτυπώστε την δεξιά και αριστερή πλευρά.

ledmatrixleft.stl
File Size:	37 kb
File Type:	stl

Download File

ledmatrixright.stl
File Size:	141 kb
File Type:	stl

Download File

Λογισμικό και πρωτόκολλο επικοινωνίας

Από εδώ μπορείτε να κατεβάσετε το λογισμικό για Windows. Σύντομα θα είναι διαθέσιμη και η εφαρμογή για Android.

ardumotive_led_matrix__windows_.zip
File Size:	490 kb
File Type:	zip

Download File

Μπορείτε να φτιάξετε την δική σας εφαρμογή για οποιοδήποτε λειτουργικό σύστημα, χρησιμοποιώντας το παρακάτω πρωτόκολλο.

Πρωτόκολλο Επικοινωνίας :

Για ημερομηνία και ώρα στείλτε: <THH:MM:SS dd/mm/yyyy>
Για κύλιση κειμένου στείλτε: <tYour Text Here>
Για το επίπεδο της φωτεινότητας στείλτε: <BAuto> ή <Bvalue> (τιμές από 1 έως 16)

Εφαρμογή για Android συσκευές

ardumotive_led_display_v3.apk
File Size:	1941 kb
File Type:	apk

Download File