The Use of Crash Sensor
From Microduino Wiki
OutlineIt is used for detecting collision. Therefore it can also be called collision signal sensor. Due to different collision direction, we can divide Microduino-Crash into left-Crash and right-Crash.
Specification
DevelopmentEquipment
Preparation
 DebuggingExperiment One: Key Detection
#define pushButton 6
int buttonState;
// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
// make the pushbutton's pin an input:
pinMode(pushButton, INPUT);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input pin:
buttonState = digitalRead(pushButton);//Read the input value of the Crash.
// print out the state of the button:
Serial.print("buttonState:");
Serial.println(buttonState); //Print the value in the serial port.
delay(100); // 100ms time delay
}
 
*Adopt " digitalRead(XX " to read the key signal, which is digital with the status of "0" or "1". Experiment Two: Press down or Release the Key
#define pushButton 6 //Define the control pin of the key.
int buttonState, num;
// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
// make the pushbutton's pin an input:
pinMode(pushButton, INPUT);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input pin:
buttonState = digitalRead(pushButton);//Read the input value of the Crash.
// print out the state of the button:
//Print the value when pressing down or releasing the key.
if (num != buttonState)
{
num = buttonState;
if (num == 1)
Serial.println("Loosen");//Release
else
Serial.println("Control");//Press down
delay(100); // 100ms time delay
}
}
 Experiment Three: Pressing status change
#define pushButton 6
int buttonState;
boolean str;
// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);//Serial communication baud rate
// make the pushbutton's pin an input:
pinMode(pushButton, INPUT);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input pin:
buttonState = digitalRead(pushButton);//Read the input value of the Crash.
if (!buttonState)
{
delay(300);
str = !str;
Serial.print("str:");
Serial.println(str);
}
}
Press once, the "str" value is True(1) or twice, the value is False(1).  Experiment Four: Short pressing & Long pressing function
#define pushButton 6
int buttonState, num;
unsigned long button_time_cache = 0;
unsigned long button_time = 0;
boolean button_sta = false;
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
// make the pushbutton's pin an input:
pinMode(pushButton, INPUT);
}
void loop() {
// read the input pin:
buttonState = digitalRead(pushButton);// Read the input value of the Crash.
if (buttonState == 0)
{
delay(100);
if (digitalRead(pushButton) == 1 && !button_sta)//Loosen the key and do not enter long pressing, meaning short pressing.
{
Serial.println("short");
}
else if (millis() - button_time_cache > 1500) //The pressing time is longer than 1.5s, meaning long pressing.
{
button_sta = true;
button_time_cache = millis();
Serial.println("long");
}
}
else if (buttonState == 1)
{
button_time_cache = millis();
button_sta = false;
}
}
 Experiment Five: Colored Light Control
#define PIN_LED A0
#define PIN_key 6
boolean status=false;
#include <Adafruit_NeoPixel.h>
Adafruit_NeoPixel strip = Adafruit_NeoPixel(6, PIN_LED, NEO_GRB + NEO_KHZ800);
void setup()
{
pinMode(PIN_key, INPUT);
pinMode(PIN_LED, OUTPUT);
strip.begin(); // Initialize the LED
strip.show(); // Initialize all pixels to 'off'
}
// the loop function runs over and over again forever
void loop()
{
if(!digitalRead(PIN_key))
{
delay(100);
if(!digitalRead(PIN_key))
{
status=!status;
}
}
if(status)
{
colorWipe(strip.Color(0, 0, 0), 10); //Close the light
}
else
{
colorWipe(strip.Color(255, 0, 0), 10); //Blue
}
}
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait)
{
for(uint16_t i=0; i<strip.numPixels(); i++)
{
strip.setPixelColor(i, c);
strip.show();
delay(wait);
}
}
Video |
