Created
October 26, 2019 03:46
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Code for my Flora-enabled backpack that has a NeoPixel ring, an SI1145 sensor, and a LSM303 sensor.
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| #include <Adafruit_NeoPixel.h> | |
| #include <Adafruit_SI1145.h> | |
| Adafruit_NeoPixel pixelCircle = Adafruit_NeoPixel(12, 9, NEO_GRBW + NEO_KHZ800); | |
| Adafruit_SI1145 lightSensor = Adafruit_SI1145(); | |
| void setup() { | |
| pixelCircle.begin(); | |
| pixelCircle.setBrightness(50); | |
| pixelCircle.show(); | |
| lightSensor.begin(); | |
| } | |
| void loop() { | |
| float index = lightSensor.readUV() / 100.0; | |
| if (index >= 1.0) { | |
| displayUVIndexOnStrip(index, &pixelCircle); | |
| delay(100); | |
| } else { | |
| showRainbowOnStrip(&pixelCircle, millis()); | |
| delay(50); | |
| } | |
| } | |
| void displayUVIndexOnStrip(float index, Adafruit_NeoPixel* strip) { | |
| unsigned int pixelCount = strip->numPixels(); | |
| unsigned int pixelsAtFullBrightness = min(static_cast<unsigned int>(index), pixelCount); | |
| unsigned int i = 0; | |
| float indexRemainder = index - pixelsAtFullBrightness; | |
| strip->clear(); | |
| for (; i < pixelsAtFullBrightness; i++) { | |
| strip->setPixelColor(i, 0xff0088); | |
| } | |
| if (i < pixelCount) { | |
| strip->setPixelColor( | |
| i, | |
| Adafruit_NeoPixel::Color( | |
| static_cast<uint8_t>(255.0 * indexRemainder), | |
| 0, | |
| static_cast<uint8_t>(128.0 * indexRemainder) | |
| ) | |
| ); | |
| } | |
| strip->show(); | |
| } | |
| void showRainbowOnStrip(Adafruit_NeoPixel* strip, unsigned long time) { | |
| unsigned int pixelCount = strip->numPixels(); | |
| unsigned long hueStepSize = 65536L / pixelCount; | |
| unsigned long timeBasedHueOffset = static_cast<unsigned long>((65536L / 5.0) * (time / 1000.0)); | |
| unsigned long hue; | |
| for (unsigned int i = 0; i < pixelCount; i++) { | |
| hue = (timeBasedHueOffset + i * hueStepSize) % 65536L; | |
| strip->setPixelColor(i, strip->gamma32(strip->ColorHSV(hue))); | |
| } | |
| strip->show(); | |
| } |
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