86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
/*************************************************************
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Blynk is a platform with iOS and Android apps to control
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ESP32, Arduino, Raspberry Pi and the likes over the Internet.
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You can easily build mobile and web interfaces for any
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projects by simply dragging and dropping widgets.
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Downloads, docs, tutorials: https://www.blynk.io
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Sketch generator: https://examples.blynk.cc
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Blynk community: https://community.blynk.cc
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Follow us: https://www.fb.com/blynkapp
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https://twitter.com/blynk_app
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Blynk library is licensed under MIT license
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This example code is in public domain.
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*************************************************************
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Control a color gradient on NeoPixel strip using a slider!
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For this example you need NeoPixel library:
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https://github.com/adafruit/Adafruit_NeoPixel
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App dashboard setup:
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Slider widget (0...500) on V1
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*************************************************************/
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/* Comment this out to disable prints and save space */
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#define BLYNK_PRINT Serial
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/* Fill in information from Blynk Device Info here */
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//#define BLYNK_TEMPLATE_ID "TMPxxxxxx"
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//#define BLYNK_TEMPLATE_NAME "Device"
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//#define BLYNK_AUTH_TOKEN "YourAuthToken"
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#include <SPI.h>
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#include <Ethernet.h>
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#include <BlynkSimpleEthernet.h>
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#include <Adafruit_NeoPixel.h>
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#define PIN 8
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Adafruit_NeoPixel strip = Adafruit_NeoPixel(30, PIN, NEO_GRB + NEO_KHZ800);
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// Input a value 0 to 255 to get a color value.
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// The colours are a transition r - g - b - back to r.
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uint32_t Wheel(byte WheelPos) {
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if (WheelPos < 85) {
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return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
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} else if (WheelPos < 170) {
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WheelPos -= 85;
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return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
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} else {
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WheelPos -= 170;
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return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
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}
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}
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BLYNK_WRITE(V1)
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{
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int shift = param.asInt();
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for (int i = 0; i < strip.numPixels(); i++)
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{
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strip.setPixelColor(i, Wheel(shift & 255));
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// OR: strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + shift) & 255));
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}
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strip.show();
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}
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void setup()
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{
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// Debug console
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Serial.begin(9600);
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Blynk.begin(BLYNK_AUTH_TOKEN);
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strip.begin();
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strip.show();
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}
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void loop()
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{
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Blynk.run();
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}
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