/*************************************************************
Control a color gradient on NeoPixel strip using a slider!
For this example you need NeoPixel library:
https://github.com/adafruit/Adafruit_NeoPixel
App dashboard setup:
Slider widget (0...500) on V1
*************************************************************/
/* Fill-in information from Blynk Device Info here */
#define BLYNK_TEMPLATE_ID "TMPL28KEXCmSl"
#define BLYNK_TEMPLATE_NAME "IoTmaestria"
#define BLYNK_AUTH_TOKEN "X8OCNrWrUGwg_5z5ZJLUaF7kGySIGs4u"
/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Adafruit_NeoPixel.h>
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
#define PIN 27
Adafruit_NeoPixel strip = Adafruit_NeoPixel(17, PIN, NEO_GRB + NEO_KHZ800);
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
if (WheelPos < 85) {
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
} else if (WheelPos < 170) {
WheelPos -= 85;
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
} else {
WheelPos -= 170;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
}
BLYNK_WRITE(V2)
{
int shift = param.asInt();
for (int i = 0; i < strip.numPixels(); i++)
{
strip.setPixelColor(i, Wheel(shift & 255));
// OR: strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + shift) & 255));
}
strip.show();
}
void setup()
{
// Debug console
Serial.begin(115200);
Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
// You can also specify server:
//Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass, "blynk.cloud", 80);
//Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass, IPAddress(192,168,1,100), 8080);
strip.begin();
strip.show();
}
void loop()
{
Blynk.run();
}