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funkfinger/neopixel_brightness_test_not_working.ino

Created October 7, 2015 13:55
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  1. funkfinger created this gist Oct 7, 2015.
    47 changes: 47 additions & 0 deletions neopixel_brightness_test_not_working.ino
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    // example sketch to demonstrate percieved neopixel library error.
    // expect green > off(-ish) > blue > off > red > off > green > off(-ish) > blue > off > red
    // get green > off(-ish) > blue > off > red > off > off > off > blue > off > red


    #include <Adafruit_NeoPixel.h>

    #define PIN 0
    Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_RGB + NEO_KHZ800);

    void setup() {
    pinMode(PIN, OUTPUT);
    strip.begin();
    strip.setPixelColor(0, strip.Color(255,0,0));
    strip.show();
    }

    void loop() {
    uint16_t wait = 2000;
    strip.setPixelColor(0, strip.Color(0,255,0)); // green
    strip.setBrightness(255);
    strip.show();
    delay(wait);
    // setting brightness to 1 is OK but pixel not 100% off
    strip.setBrightness(1);
    strip.show();
    delay(wait);

    strip.setPixelColor(0, strip.Color(0,0,255)); // blue
    strip.setBrightness(255);
    strip.show();
    delay(wait);
    // setting color to 'black' is ok...
    strip.setPixelColor(0, strip.Color(0,0,0));
    strip.show();
    delay(wait);

    strip.setPixelColor(0, strip.Color(255,0,0)); // red
    strip.setBrightness(255);
    strip.show();
    delay(wait);
    // but setting brightness to 0 kills strip
    strip.setBrightness(0);
    strip.show();
    delay(wait);
    // and we never get back brightness until we set pixel color
    }