Touch-free Elevator

An affordable, easy, and touch-free solution to select floors in an elevator

Aug 7, 2020

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touch less do more challenge

post-covid

affordable

touch-free

Components and supplies

Arduino Nano R3

Infrared Emitter, 30 °

Resistor 220 ohm

Photodiode, 35 °

Tools and machines

Soldering iron (generic)

Solder Wire, Lead Free

3D Printer (generic)

Apps and platforms

Arduino IDE

Project description

Code

Infrared Detect and Select Floors

arduino

This is the main code of our system. It determines which button is bushed and which floor is detected. Right now it is now linked to a specific elevator so the code is not workable. Figure out how your elevator communication works and then change the part that needs to be changed.

1/*
2  InfraredDetectAndSelectFloor
3
4  This program is used to  read values from all ports you assigned. Change the value of "NumberOfButton"  to fit your target elevator. Be sure to assign the ports manually. 
5  
6  Now  we have only assigned 1 port so only A0 is used. if you want to used both A0 and  A1 for inputs, change NumberOfButton to 2 and set IR_REC[NumberOfButton] to {A0,A1}.
7
8  Author: Sky Song
9*/
10
11int const NumberOfButton = 1; //Number of buttons  of the target elevator. Remeber if there are more than 8 buttons, you need to use  another Arduino Nano
12int IR_REC[NumberOfButton] = {A0}; //Assign photodiodes  analog port numbers, A0 is used for testing 1 block
13int tolerance = 20; //variable  that defines tolerance, 20 is generally a good value in our testing
14
15int UpperBound[NumberOfButton],  LowerBound[NumberOfButton];
16
17
18
19
20
21void setup()
22{
23  Serial.begin(9600);
24  for(int i = 0; i< NumberOfButton; i++)
25  {
26    pinMode(IR_REC[i], INPUT);
27  }
28
29  //Get the initial value of all ports when starting
30  for(int i =  0; i< NumberOfButton; i++)
31  {
32    int InitValue[NumberOfButton];
33    
34    //Assign inital values to all ports
35    for(int i = 0; i< NumberOfButton;  i++)
36    {
37      InitValue[i] = analogRead(IR_REC[i]);
38      for(int j  = 0; j < 200; j++) //Sample 200 times and get a more accurate mean number of the  inital value of the ith port
39      {
40        InitValue[i] = InitValue[i] +  analogRead(IR_REC[i]);
41        InitValue[i] = InitValue[i] / 2;
42      }
43    }
44    
45    //establish the tolerance range
46    UpperBound[i] = InitValue[i]  + tolerance;
47    LowerBound[i] = InitValue[i] - tolerance;
48  }
49  
50
51  Serial.println("Ready!");
52}
53
54
55
56
57
58void loop()
59{
60  for(int  i = 0; i < NumberOfButton; i++)
61  {
62    int average = analogRead(IR_REC[i]);  
63    for(int j = 0; j < 20; j++)//To get an average value to avoid fluctuations
64     {
65       average = average + analogRead(IR_REC[i]);
66       average =  average / 2;
67     }      
68     
69      //if the port just scanned is within  the tolerance range (been pressed), then do some action
70      if(average <= UpperBound  and average >= LowerBound){}
71      else
72      {
73        Serial.println("pressed");//Here  comes the actual action need to be done. We can change it to adapt the elevator  control unit to select floors. Right now it's printing "pressed" onto the monitor
74      }
75    if(i < NumberOfButton) i = 0;//Reset when finish scaning all ports
76  }
77}
78

/*
  InfraredDetectAndSelectFloor

  This program is used to  read values from all ports you assigned. Change the value of "NumberOfButton"  to fit your target elevator. Be sure to assign the ports manually. 
  
  Now  we have only assigned 1 port so only A0 is used. if you want to used both A0 and  A1 for inputs, change NumberOfButton to 2 and set IR_REC[NumberOfButton] to {A0,A1}.

  Author: Sky Song
*/

int const NumberOfButton = 1; //Number of buttons  of the target elevator. Remeber if there are more than 8 buttons, you need to use  another Arduino Nano
int IR_REC[NumberOfButton] = {A0}; //Assign photodiodes  analog port numbers, A0 is used for testing 1 block
int tolerance = 20; //variable  that defines tolerance, 20 is generally a good value in our testing

int UpperBound[NumberOfButton],  LowerBound[NumberOfButton];





void setup()
{
  Serial.begin(9600);
  for(int i = 0; i< NumberOfButton; i++)
  {
    pinMode(IR_REC[i], INPUT);
  }

  //Get the initial value of all ports when starting
  for(int i =  0; i< NumberOfButton; i++)
  {
    int InitValue[NumberOfButton];
    
    //Assign inital values to all ports
    for(int i = 0; i< NumberOfButton;  i++)
    {
      InitValue[i] = analogRead(IR_REC[i]);
      for(int j  = 0; j < 200; j++) //Sample 200 times and get a more accurate mean number of the  inital value of the ith port
      {
        InitValue[i] = InitValue[i] +  analogRead(IR_REC[i]);
        InitValue[i] = InitValue[i] / 2;
      }
    }
    
    //establish the tolerance range
    UpperBound[i] = InitValue[i]  + tolerance;
    LowerBound[i] = InitValue[i] - tolerance;
  }
  

  Serial.println("Ready!");
}





void loop()
{
  for(int  i = 0; i < NumberOfButton; i++)
  {
    int average = analogRead(IR_REC[i]);  
    for(int j = 0; j < 20; j++)//To get an average value to avoid fluctuations
     {
       average = average + analogRead(IR_REC[i]);
       average =  average / 2;
     }      
     
      //if the port just scanned is within  the tolerance range (been pressed), then do some action
      if(average <= UpperBound  and average >= LowerBound){}
      else
      {
        Serial.println("pressed");//Here  comes the actual action need to be done. We can change it to adapt the elevator  control unit to select floors. Right now it's printing "pressed" onto the monitor
      }
    if(i < NumberOfButton) i = 0;//Reset when finish scaning all ports
  }
}

Infrared Detect and Select Floors

arduino

1/*
2  InfraredDetectAndSelectFloor
3
4  This program is used to   read values from all ports you assigned. Change the value of "NumberOfButton"   to fit your target elevator. Be sure to assign the ports manually. 
5  
6  Now   we have only assigned 1 port so only A0 is used. if you want to used both A0 and   A1 for inputs, change NumberOfButton to 2 and set IR_REC[NumberOfButton] to {A0,A1}.
7
8   Author: Sky Song
9*/
10
11int const NumberOfButton = 1; //Number of buttons   of the target elevator. Remeber if there are more than 8 buttons, you need to use   another Arduino Nano
12int IR_REC[NumberOfButton] = {A0}; //Assign photodiodes   analog port numbers, A0 is used for testing 1 block
13int tolerance = 20; //variable   that defines tolerance, 20 is generally a good value in our testing
14
15int UpperBound[NumberOfButton],   LowerBound[NumberOfButton];
16
17
18
19
20
21void setup()
22{
23  Serial.begin(9600);
24   for(int i = 0; i< NumberOfButton; i++)
25  {
26    pinMode(IR_REC[i], INPUT);
27   }
28
29  //Get the initial value of all ports when starting
30  for(int i =   0; i< NumberOfButton; i++)
31  {
32    int InitValue[NumberOfButton];
33    
34     //Assign inital values to all ports
35    for(int i = 0; i< NumberOfButton;   i++)
36    {
37      InitValue[i] = analogRead(IR_REC[i]);
38      for(int j   = 0; j < 200; j++) //Sample 200 times and get a more accurate mean number of the   inital value of the ith port
39      {
40        InitValue[i] = InitValue[i] +   analogRead(IR_REC[i]);
41        InitValue[i] = InitValue[i] / 2;
42      }
43     }
44    
45    //establish the tolerance range
46    UpperBound[i] = InitValue[i]   + tolerance;
47    LowerBound[i] = InitValue[i] - tolerance;
48  }
49  
50
51   Serial.println("Ready!");
52}
53
54
55
56
57
58void loop()
59{
60  for(int   i = 0; i < NumberOfButton; i++)
61  {
62    int average = analogRead(IR_REC[i]);   
63    for(int j = 0; j < 20; j++)//To get an average value to avoid fluctuations
64      {
65       average = average + analogRead(IR_REC[i]);
66       average =   average / 2;
67     }      
68     
69      //if the port just scanned is within   the tolerance range (been pressed), then do some action
70      if(average <= UpperBound   and average >= LowerBound){}
71      else
72      {
73        Serial.println("pressed");//Here   comes the actual action need to be done. We can change it to adapt the elevator   control unit to select floors. Right now it's printing "pressed" onto the monitor
74       }
75    if(i < NumberOfButton) i = 0;//Reset when finish scaning all ports
76   }
77}
78

/*
  InfraredDetectAndSelectFloor

  This program is used to   read values from all ports you assigned. Change the value of "NumberOfButton"   to fit your target elevator. Be sure to assign the ports manually. 
  
  Now   we have only assigned 1 port so only A0 is used. if you want to used both A0 and   A1 for inputs, change NumberOfButton to 2 and set IR_REC[NumberOfButton] to {A0,A1}.

   Author: Sky Song
*/

int const NumberOfButton = 1; //Number of buttons   of the target elevator. Remeber if there are more than 8 buttons, you need to use   another Arduino Nano
int IR_REC[NumberOfButton] = {A0}; //Assign photodiodes   analog port numbers, A0 is used for testing 1 block
int tolerance = 20; //variable   that defines tolerance, 20 is generally a good value in our testing

int UpperBound[NumberOfButton],   LowerBound[NumberOfButton];





void setup()
{
  Serial.begin(9600);
   for(int i = 0; i< NumberOfButton; i++)
  {
    pinMode(IR_REC[i], INPUT);
   }

  //Get the initial value of all ports when starting
  for(int i =   0; i< NumberOfButton; i++)
  {
    int InitValue[NumberOfButton];
    
     //Assign inital values to all ports
    for(int i = 0; i< NumberOfButton;   i++)
    {
      InitValue[i] = analogRead(IR_REC[i]);
      for(int j   = 0; j < 200; j++) //Sample 200 times and get a more accurate mean number of the   inital value of the ith port
      {
        InitValue[i] = InitValue[i] +   analogRead(IR_REC[i]);
        InitValue[i] = InitValue[i] / 2;
      }
     }
    
    //establish the tolerance range
    UpperBound[i] = InitValue[i]   + tolerance;
    LowerBound[i] = InitValue[i] - tolerance;
  }
  

   Serial.println("Ready!");
}





void loop()
{
  for(int   i = 0; i < NumberOfButton; i++)
  {
    int average = analogRead(IR_REC[i]);   
    for(int j = 0; j < 20; j++)//To get an average value to avoid fluctuations
      {
       average = average + analogRead(IR_REC[i]);
       average =   average / 2;
     }      
     
      //if the port just scanned is within   the tolerance range (been pressed), then do some action
      if(average <= UpperBound   and average >= LowerBound){}
      else
      {
        Serial.println("pressed");//Here   comes the actual action need to be done. We can change it to adapt the elevator   control unit to select floors. Right now it's printing "pressed" onto the monitor
       }
    if(i < NumberOfButton) i = 0;//Reset when finish scaning all ports
   }
}

Downloadable files

Schematic for 1 block

This is the diagram for 1 block to show its connection to Arduino Nano

Schematic for 1 block

Schematics for 2 blocks

This is the diagram for 1 block to show its connection to Arduino Nano. This shows how multiple blocks are connected electrically.

Schematics for 2 blocks

Schematic for 1 block

This is the diagram for 1 block to show its connection to Arduino Nano

Schematic for 1 block

Schematics for 2 blocks

This is the diagram for 1 block to show its connection to Arduino Nano. This shows how multiple blocks are connected electrically.

Schematics for 2 blocks

Documentation

Reference

The reference for the final effect. NOT an actual component. The big buttons on the back panel are the original buttons of a elevator and the cylinders on the blocks are infrared emitter and photodiodes. Arduino Nano will be placed into the big box on the bottom.

Reference

Block

"Blocks" build up the whole system and are the main frames.

Block

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