kopia lustrzana https://github.com/pimoroni/pimoroni-pico
65 wiersze
1.6 KiB
C++
65 wiersze
1.6 KiB
C++
#include <stdio.h>
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#include "pico/stdlib.h"
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#include "plasma_stick.hpp"
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#include "common/pimoroni_common.hpp"
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#include "bme280.hpp"
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/*
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Reads the temperature from a BME280 breakout...
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...and changes the LED strip an appropriate colour.
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https://shop.pimoroni.com/products/bme280-breakout
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*/
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using namespace pimoroni;
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using namespace plasma;
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// Set how many LEDs you have
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const uint NUM_LEDS = 50;
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// Set up brightness (between 0 and 1)
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constexpr float BRIGHTNESS = 1.0f;
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// The range of readings that we want to map to colours
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const uint MIN = 10;
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const uint MAX = 30;
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// Pick what bits of the colour wheel to use (from 0-360°)
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// https://www.cssscript.com/demo/hsv-hsl-color-wheel-picker-reinvented/
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const uint HUE_START = 230; // blue
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const uint HUE_END = 359; // red
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// WS28X-style LEDs with a single signal line. AKA NeoPixel
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WS2812 led_strip(NUM_LEDS, pio0, 0, plasma_stick::DAT);
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I2C i2c(BOARD::PLASMA_STICK);
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BME280 bme(&i2c);
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int main() {
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stdio_init_all();
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led_strip.start();
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if(bme.init()) {
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printf("BME280 found...\n");
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while(true) {
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BME280::bme280_reading result = bme.read_forced();
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printf("%s %0.2lf deg C, %0.2lf hPa, %0.2lf%%\n", result.status == BME280_OK ? "OK" : "ER", result.temperature, result.pressure, result.humidity);
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// calculates a colour
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float hue = HUE_START + ((float)(result.temperature - MIN) * (float)(HUE_END - HUE_START) / (float)(MAX - MIN));
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// set the leds
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for(auto i = 0u; i < NUM_LEDS; i++) {
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led_strip.set_hsv(i, hue / 360.0f, 1.0, BRIGHTNESS);
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}
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}
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}
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else {
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printf("BME280 not found :'(\n");
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}
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return 0;
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}
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