Virtual Peephole

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Feb 7, 2020

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art

internet of things

monitoring

Components and supplies

Door Eye

Raspberry Pi Screen

Photo resistor

Wooden Box

Raspberry Pi 3 Model B

Arduino Micro

Tools and machines

Drill, Screwdriver

Project description

Code

Light variation detection + Keyboard signal

arduino

This code detects a light variation in the photocell and sends out a keyboard signal.

1long previousMillis = 0;
2long calibrationtime = 5000;
3long startMillis   = 0;
4int sensorMin = 1024;
5int sensorMax = 0;
6int average = 0;
7int threshold   = 5;
8bool lastState = true;
9bool isClosed = true;
10
11#include "Keyboard.h"
12
13void   setup() {
14  // put your setup code here, to run once:
15  Serial.begin(9600);
16   Serial.println("setup");
17  Keyboard.begin();
18  startMillis = millis();
19}
20
21void   loop() {
22  unsigned long currentMillis = millis();
23  int sensorValue = analogRead(A0);
24   //Serial.println(sensorValue);
25
26  if(currentMillis-startMillis < calibrationtime)   {
27    // save the last time you blinked the LED 
28    // print out the value   you read:
29    int elapsedtime = currentMillis - startMillis;
30    Serial.println(elapsedtime);
31     Serial.println(sensorMin);
32    Serial.println(sensorMax);
33    if(sensorValue   < sensorMin){
34      sensorMin = sensorValue;
35      average = (sensorMin +   sensorMax )/2;
36    }
37    if(sensorValue > sensorMax){
38      sensorMax =   sensorValue;
39      average = (sensorMin + sensorMax )/2;
40    }
41    delay(100);   
42  }
43  else{
44    if(sensorValue > average + threshold){
45      isClosed   = false;
46      if(lastState != isClosed){
47        }
48    }
49    else{
50       isClosed = true;
51      if(lastState != isClosed){
52        Keyboard.print("   ");
53        }
54    }
55    lastState = isClosed;
56    delay(100);
57   }
58   
59  //stabilize the reading in the first 3 seconds
60  //then, detect a variation   in the stabilization. 
61  //also provide a reset button just in case.
62  
63}

long previousMillis = 0;
long calibrationtime = 5000;
long startMillis   = 0;
int sensorMin = 1024;
int sensorMax = 0;
int average = 0;
int threshold   = 5;
bool lastState = true;
bool isClosed = true;

#include "Keyboard.h"

void   setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
   Serial.println("setup");
  Keyboard.begin();
  startMillis = millis();
}

void   loop() {
  unsigned long currentMillis = millis();
  int sensorValue = analogRead(A0);
   //Serial.println(sensorValue);

  if(currentMillis-startMillis < calibrationtime)   {
    // save the last time you blinked the LED 
    // print out the value   you read:
    int elapsedtime = currentMillis - startMillis;
    Serial.println(elapsedtime);
     Serial.println(sensorMin);
    Serial.println(sensorMax);
    if(sensorValue   < sensorMin){
      sensorMin = sensorValue;
      average = (sensorMin +   sensorMax )/2;
    }
    if(sensorValue > sensorMax){
      sensorMax =   sensorValue;
      average = (sensorMin + sensorMax )/2;
    }
    delay(100);   
  }
  else{
    if(sensorValue > average + threshold){
      isClosed   = false;
      if(lastState != isClosed){
        }
    }
    else{
       isClosed = true;
      if(lastState != isClosed){
        Keyboard.print("   ");
        }
    }
    lastState = isClosed;
    delay(100);
   }
   
  //stabilize the reading in the first 3 seconds
  //then, detect a variation   in the stabilization. 
  //also provide a reset button just in case.
  
}

Virtual Peephole website source code

This is the website that is displayed in the virtual peephole. Use the spacebar to navigate through webcams.

no description/ Read More

Latest commit to the master branch on Invalid date

Download as a zip

Light variation detection + Keyboard signal

arduino

This code detects a light variation in the photocell and sends out a keyboard signal.

1long previousMillis = 0;
2long calibrationtime = 5000;
3long startMillis  = 0;
4int sensorMin = 1024;
5int sensorMax = 0;
6int average = 0;
7int threshold  = 5;
8bool lastState = true;
9bool isClosed = true;
10
11#include "Keyboard.h"
12
13void  setup() {
14  // put your setup code here, to run once:
15  Serial.begin(9600);
16  Serial.println("setup");
17  Keyboard.begin();
18  startMillis = millis();
19}
20
21void  loop() {
22  unsigned long currentMillis = millis();
23  int sensorValue = analogRead(A0);
24  //Serial.println(sensorValue);
25
26  if(currentMillis-startMillis < calibrationtime)  {
27    // save the last time you blinked the LED 
28    // print out the value  you read:
29    int elapsedtime = currentMillis - startMillis;
30    Serial.println(elapsedtime);
31    Serial.println(sensorMin);
32    Serial.println(sensorMax);
33    if(sensorValue  < sensorMin){
34      sensorMin = sensorValue;
35      average = (sensorMin +  sensorMax )/2;
36    }
37    if(sensorValue > sensorMax){
38      sensorMax =  sensorValue;
39      average = (sensorMin + sensorMax )/2;
40    }
41    delay(100);  
42  }
43  else{
44    if(sensorValue > average + threshold){
45      isClosed  = false;
46      if(lastState != isClosed){
47        }
48    }
49    else{
50      isClosed = true;
51      if(lastState != isClosed){
52        Keyboard.print("  ");
53        }
54    }
55    lastState = isClosed;
56    delay(100);
57   }
58  
59  //stabilize the reading in the first 3 seconds
60  //then, detect a variation  in the stabilization. 
61  //also provide a reset button just in case.
62  
63}

long previousMillis = 0;
long calibrationtime = 5000;
long startMillis  = 0;
int sensorMin = 1024;
int sensorMax = 0;
int average = 0;
int threshold  = 5;
bool lastState = true;
bool isClosed = true;

#include "Keyboard.h"

void  setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("setup");
  Keyboard.begin();
  startMillis = millis();
}

void  loop() {
  unsigned long currentMillis = millis();
  int sensorValue = analogRead(A0);
  //Serial.println(sensorValue);

  if(currentMillis-startMillis < calibrationtime)  {
    // save the last time you blinked the LED 
    // print out the value  you read:
    int elapsedtime = currentMillis - startMillis;
    Serial.println(elapsedtime);
    Serial.println(sensorMin);
    Serial.println(sensorMax);
    if(sensorValue  < sensorMin){
      sensorMin = sensorValue;
      average = (sensorMin +  sensorMax )/2;
    }
    if(sensorValue > sensorMax){
      sensorMax =  sensorValue;
      average = (sensorMin + sensorMax )/2;
    }
    delay(100);  
  }
  else{
    if(sensorValue > average + threshold){
      isClosed  = false;
      if(lastState != isClosed){
        }
    }
    else{
      isClosed = true;
      if(lastState != isClosed){
        Keyboard.print("  ");
        }
    }
    lastState = isClosed;
    delay(100);
   }
  
  //stabilize the reading in the first 3 seconds
  //then, detect a variation  in the stabilization. 
  //also provide a reset button just in case.
  
}

Downloadable files

Photocell diagram

This is a simple photocell diagram.

Photocell diagram

This is a simple photocell diagram.

Photocell diagram

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carolinebuttet

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