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arduino-cli/libraries/Blynk/examples/More/Stroboscope/Stroboscope.ino

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+/*************************************************************
+  Download latest Blynk library here:
+    https://github.com/blynkkk/blynk-library/releases/latest
+
+  Blynk is a platform with iOS and Android apps to control
+  Arduino, Raspberry Pi and the likes over the Internet.
+  You can easily build graphic interfaces for all your
+  projects by simply dragging and dropping widgets.
+
+    Downloads, docs, tutorials: http://www.blynk.cc
+    Sketch generator:           http://examples.blynk.cc
+    Blynk community:            http://community.blynk.cc
+    Follow us:                  http://www.fb.com/blynkapp
+                                http://twitter.com/blynk_app
+
+  Blynk library is licensed under MIT license
+  This example code is in public domain.
+
+ *************************************************************
+
+  This is a simple stroboscope.
+  You can turn it on and of using a button,
+  and control frequency with a slider.
+
+  App project setup:
+    Button widget (Switch) on V1
+    Slider widget (100...1000) on V2
+ *************************************************************/
+
+/* Comment this out to disable prints and save space */
+#define BLYNK_PRINT Serial
+
+
+#include <SPI.h>
+#include <Ethernet.h>
+#include <BlynkSimpleEthernet.h>
+
+// You should get Auth Token in the Blynk App.
+// Go to the Project Settings (nut icon).
+char auth[] = "YourAuthToken";
+
+#define LED_PIN 9
+
+BlynkTimer timer;
+int t1;
+
+// Toggle LED
+void ledBlynk()
+{
+  digitalWrite(LED_PIN, !digitalRead(LED_PIN));
+}
+
+// Enable/disable blinking using virtual pin 1
+BLYNK_WRITE(V1)
+{
+  if (param.asInt()) {
+    timer.enable(t1);
+  } else {
+    timer.disable(t1);
+    digitalWrite(LED_PIN, LOW);
+  }
+}
+
+// Change blink interval using virtual pin 2
+BLYNK_WRITE(V2)
+{
+  long interval = param.asLong();
+  boolean wasEnabled = timer.isEnabled(t1);
+  timer.deleteTimer(t1);
+  t1 = timer.setInterval(interval, ledBlynk);
+  if (!wasEnabled) {
+    timer.disable(t1);
+  }
+}
+
+void setup()
+{
+  // Debug console
+  Serial.begin(9600);
+
+  Blynk.begin(auth);
+
+  // Configure LED and timer
+  pinMode(LED_PIN, OUTPUT);
+  t1 = timer.setInterval(500L, ledBlynk);
+  timer.disable(t1);
+}
+
+void loop()
+{
+  Blynk.run();
+  timer.run();
+}
+