Ticker library

libraries/Ticker/examples/TickerBasic/TickerBasic.ino

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+/*
+  Basic Ticker usage
+  
+  Ticker is an object that will call a given function with a certain period.
+  Each Ticker calls one function. You can have as many Tickers as you like,
+  memory being the only limitation.
+  
+  A function may be attached to a ticker and detached from the ticker.
+  There are two variants of the attach function: attach and attach_ms.
+  The first one takes period in seconds, the second one in milliseconds.
+  
+  An LED connected to GPIO1 will be blinking. Use a built-in LED on ESP-01
+  or connect an external one to TXD on other boards.
+*/
+
+#include <Ticker.h>
+
+Ticker flipper;
+
+int count = 0;
+
+void flip()
+{
+  int state = digitalRead(1);  // get the current state of GPIO1 pin
+  digitalWrite(1, !state);     // set pin to the opposite state
+  
+  ++count;
+  // when the counter reaches a certain value, start blinking like crazy
+  if (count == 20)
+  {
+    flipper.attach(&flip, 0.1);
+  }
+  // when the counter reaches yet another value, stop blinking
+  else if (count == 120)
+  {
+    flipper.detach();
+  }
+}
+
+void setup() {
+  pinMode(1, OUTPUT);
+  digitalWrite(1, LOW);
+  
+  // flip the pin every 0.3s
+  flipper.attach(&flip, 0.3);
+}
+
+void loop() {
+}