ardunio code for the connected LED matrix for the elevator

led_matrix.ino

@@ -0,0 +1,182 @@
+#include "LedControl.h"
+/*
+ pin 12 is connected to the DataIn 
+ pin 11 is connected to LOAD(CS)
+ pin 10 is connected to the CLK 
+ */
+LedControl lc=LedControl(12,10,11,1);
+
+// web url to make the matrices
+// https://xantorohara.github.io/led-matrix-editor/#18181899db7e3c18|18181899db7e3c18|0018181899db7e3c|000018181899db7e|00000018181899db|0000000018181899|1800000000181818|3c18000000001818|7e3c180000000018|db7e3c1800000000|99db7e3c18000000|1899db7e3c180000|181899db7e3c1800|18181899db7e3c18
+
+const uint64_t UPARROW[] = {
+  0x18181899db7e3c18,0x0018181899db7e3c,0x000018181899db7e,0x00000018181899db,
+  0x0000000018181899,0x1800000000181818,0x3c18000000001818,0x7e3c180000000018,
+  0xdb7e3c1800000000,0x99db7e3c18000000,0x1899db7e3c180000,0x181899db7e3c1800
+};
+
+const uint64_t DOWNARROW[] = {
+  0x183c7edb99181818,0x3c7edb9918181800,0x7edb991818180000,0xdb99181818000000,
+  0x9918181800000000,0x1818180000000018,0x181800000000183c,0x1800000000183c7e,
+  0x00000000183c7edb,0x000000183c7edb99,0x0000183c7edb9918,0x00183c7edb991818
+};
+
+const uint64_t ATTHETOP[] = {
+  0x1899db7e3c1800ff
+};
+
+const uint64_t ATTHEBOTTOM[] = {
+  0xff00183c7edb9918
+};
+
+const uint64_t HELPBUTTON[] = {
+  0x18ff814242423c18
+};
+
+const int UPARROW_LEN = sizeof(UPARROW)/8;
+const int DOWNARROW_LEN = sizeof(DOWNARROW)/8;
+const int ATTHEBOTTOM_LEN = sizeof(ATTHEBOTTOM)/8;
+const int ATTHETOP_LEN = sizeof(ATTHETOP)/8;
+const int HELPBUTTON_LEN = sizeof(HELPBUTTON)/8;
+int i = 0;
+int RX_data=0;
+bool goingup, goingdown, atthetop, atthebottom, helpbutton = false;
+int topbottomtimer = 0;
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  lc.shutdown(0,true);
+  /* Set the brightness to a medium values */
+  lc.setIntensity(0,0);
+  /* and clear the display */
+  lc.clearDisplay(0);
+}
+
+void loop() {
+  // let's read the serial port first to see what action we need to take.
+  if(Serial.available()) 
+  {
+    RX_data = Serial.read(); 
+  }
+ 
+  // now we take that data and make our decisions
+  if(RX_data == '1') // elevator going down is 1
+  {
+    goingup = false;
+    goingdown = true;    
+  }
+  else if(RX_data == '2') // elevator going up is 2
+  {    
+    goingdown = false;
+    goingup = true;
+  }
+  else if(RX_data == '3') // elevator stopped is 3
+  {
+    goingup = false;
+    goingdown = false;
+    atthebottom = false;
+    atthetop = false;  
+  }
+  else if(RX_data == '4') // elevator has reached the top
+  {
+    goingup = false;
+    goingdown = false;
+    atthebottom = false;
+    atthetop = true;
+  }
+  else if(RX_data == '5') // elevator is at the bottom
+  {
+    goingup = false;
+    goingdown = false;
+    atthetop = false;
+    atthebottom = true;
+  }
+  // for the help button, we only change its status, so when it is pressed/unpressed
+  // whatever action was happening before will continue
+  else if(RX_data == '6') // someone pressed the help button
+  {
+    helpbutton = true;
+  }
+  else if (RX_data == '7') // the help button is not pressed anymore
+  {
+    helpbutton = false;
+  }
+
+  if (atthetop || atthebottom)
+  {    
+    if (topbottomtimer <= 100)
+    {
+      topbottomtimer++;
+    }
+  }
+
+  // now that we've set the application state based on the serial input, make the LEDs happen!
+  if (helpbutton)
+  {
+    lc.shutdown(0,false);
+    displayImage(HELPBUTTON[i]);
+    if (++i >= HELPBUTTON_LEN ) 
+    {
+      i = 0;
+    }
+    delay(100);   
+  }
+  else if (goingup)
+  {
+    lc.shutdown(0,false);
+    displayImage(UPARROW[i]);
+    if (++i >= UPARROW_LEN ) 
+    {
+      i = 0;
+    }
+    delay(100);
+    topbottomtimer = 0;
+  }
+  else if (goingdown)
+  {
+    lc.shutdown(0,false);
+    displayImage(DOWNARROW[i]);
+    if (++i >= DOWNARROW_LEN ) 
+    {
+      i = 0;
+    }
+    delay(100);
+    topbottomtimer = 0; 
+  }
+  else if (atthetop && topbottomtimer < 100)
+  {
+    lc.shutdown(0,false);
+    displayImage(ATTHETOP[i]);
+    if (++i >= ATTHETOP_LEN ) 
+    {
+      i = 0;
+    }
+    delay(100);
+  }
+  else if (atthebottom && topbottomtimer < 100)
+  {
+    lc.shutdown(0,false);
+    displayImage(ATTHEBOTTOM[i]);
+    if (++i >= ATTHEBOTTOM_LEN ) 
+    {
+      i = 0;
+    }
+    delay(100);     
+  }
+  // otherwise, turn off the display to save energy
+  else
+  {
+    lc.clearDisplay(0);
+    lc.shutdown(0,true);
+  }
+}
+
+void displayImage(uint64_t image) {
+  for (int i = 0; i < 8; i++) {
+    byte row = (image >> i * 8) & 0xFF;
+    for (int j = 0; j < 8; j++) {
+      lc.setLed(0, i, j, bitRead(row, j));
+    }
+  }
+}