Sociable Objects: a nap doorbell

L.J — Mon, 15 Feb 2010 22:07:33 +0000

Nap doorbells are designed for nappers. They will not actually ring and wake you up unless it is a real emergency. This project is developed in collaboration with Adi and Asli.

Doorbell for insistent visitors from My Journey on Vimeo.

Switch Code

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int BUTTON = 2;
int GREEN = 12;
int RED = 13;

void setup()
{
pinMode(BUTTON, INPUT);
pinMode(GREEN, OUTPUT);
pinMode(RED, OUTPUT);
Serial.begin(9600);
}

void loop()
{
if (digitalRead(BUTTON) == HIGH)
{
Serial.print('D');
delay(10);
}

if (Serial.available() > 0)
{
char r = Serial.read();
if (r == 'G')
{
digitalWrite(GREEN, HIGH);
}
else if (r == 'R')
{
digitalWrite(RED, HIGH);
}
}
else
{
digitalWrite(GREEN, LOW);
digitalWrite(RED, LOW);
}
}

Buzzer Code

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int BELL = 5;
long lastReleased = -1;
long lastPressed = -1;
int counter = 0;
int offcounter = 0;

boolean pressed = false;

void setup()
{
pinMode (BELL, OUTPUT);
Serial.begin(9600);
}

void loop()
{
if((Serial.available() > 0))
{
if (Serial.read() == 'D') // look for a capital D over the serial port and ring the bell if found
{
//Serial.println("ON");
if (!pressed)
{
lastPressed = millis();
pressed = true;
long interval = lastPressed - lastReleased;

//Serial.print("+");
//Serial.println(counter, DEC);
//Serial.println(interval);

if (interval < 1000) // if this one is pressed soon enough, increase the counter
{
counter++;
}
else
{
counter = 0;
}
}

//send feedback that message was recieved
if (counter >= 5)
{
Serial.print('G');
//ring the bell briefly
digitalWrite(BELL, HIGH);
delay(10);
digitalWrite(BELL, LOW);
}
else
{
Serial.print('R');
}

offcounter = 0;
}

}
else
{
//Serial.println("OFF");
offcounter++;
if (pressed && offcounter > 5000)
{
pressed = false;
Serial.print("-");
lastReleased = millis();
offcounter = 0;
}
}
}

lithium flowers bloom » nap

Sociable Objects: a nap doorbell