Paso 2: código
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#include <Adafruit_NeoPixel.h> // Parameter 1 = number of pixels in strip// Parameter 2 = pin number (most are valid)// Parameter 3 = pixel type flags, add together as needed:// NEO_RGB Pixels are wired for RGB bitstream// NEO_GRB Pixels are wired for GRB bitstream// NEO_KHZ400 400 KHz bitstream (e.g. FLORA pixels)// NEO_KHZ800 800 KHz bitstream (e.g. High Density LED strip) Adafruit_NeoPixel strip = Adafruit_NeoPixel(4, 6, NEO_GRB + NEO_KHZ400); int sonarPin = 9; //pin connected to analog out on maxsonar sensorint inchesAway; // inches away from the maxsonar sensorvoidsetup() { strip.begin(); strip.show(); // Initialize all pixels to 'off'Serial.begin(9600); } voidloop() { inchesAway = analogRead(sonarPin) /2; // reads the maxsonar sensor and divides the value by 2// approximate distance in inchesSerial.print(inchesAway); // prints the sensor information from the maxsonar to the serial monitor Serial.println(" inches from sensor"); if (inchesAway < 19) { // if something is 24 inches away then make a 1khz soundlong startTime = millis(); // record the beginning of the proximity event. while (inchesAway < 19) { if ((millis() - startTime) >= 3000) // If we have been in this loop for 5 seconds { break; // exit the loop } inchesAway = analogRead(sonarPin) /2; // keep reading the sensor if ((millis() - startTime) >= 3000) // we passed the 5 second test { for(int j = 0; j < 30; j++){ for(int i = 0; i < 4; i++) { strip.setPixelColor(i, strip.Color(250, 0, 0)); } strip.show(); delay(100); for(int i = 0; i < 4; i++) { strip.setPixelColor(i, strip.Color(0, 0, 0)); } strip.show(); delay(100);// Flash the leds } } // turn LED on: elseif (inchesAway > 18){ strip.setPixelColor(1, strip.Color(0, 0, 0)); } }//end while }//end if }//end void loop
