update Code

libraries/TaskScheduler-master/examples/Scheduler_example01/Scheduler_example01.ino

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+/** 
+ *  TaskScheduler Test
+ *
+ *  Initially only tasks 1 and 2 are enabled
+ *  Task1 runs every 2 seconds 10 times and then stops
+ *  Task2 runs every 3 seconds indefinitely
+ *  Task1 enables Task3 at its first run
+ *  Task3 run every 5 seconds
+ *  Task1 disables Task3 on its last iteration and changed Task2 to run every 1/2 seconds
+ *  At the end Task2 is the only task running every 1/2 seconds
+ */
+ 
+ 
+#include <TaskScheduler.h>
+
+// Callback methods prototypes
+void t1Callback();
+void t2Callback();
+void t3Callback();
+
+//Tasks
+Task t4();
+Task t1(2000, 10, &t1Callback);
+Task t2(3000, TASK_FOREVER, &t2Callback);
+Task t3(5000, TASK_FOREVER, &t3Callback);
+
+Scheduler runner;
+
+
+void t1Callback() {
+    Serial.print("t1: ");
+    Serial.println(millis());
+    
+    if (t1.isFirstIteration()) {
+      runner.addTask(t3);
+      t3.enable();
+      Serial.println("t1: enabled t3 and added to the chain");
+    }
+    
+    if (t1.isLastIteration()) {
+      t3.disable();
+      runner.deleteTask(t3);
+      t2.setInterval(500);
+      Serial.println("t1: disable t3 and delete it from the chain. t2 interval set to 500");
+    }
+}
+
+void t2Callback() {
+    Serial.print("t2: ");
+    Serial.println(millis());
+  
+}
+
+void t3Callback() {
+    Serial.print("t3: ");
+    Serial.println(millis());
+  
+}
+
+void setup () {
+  Serial.begin(115200);
+  Serial.println("Scheduler TEST");
+  
+  runner.init();
+  Serial.println("Initialized scheduler");
+  
+  runner.addTask(t1);
+  Serial.println("added t1");
+  
+  runner.addTask(t2);
+  Serial.println("added t2");
+
+  delay(5000);
+  
+  t1.enable();
+  Serial.println("Enabled t1");
+  t2.enable();
+  Serial.println("Enabled t2");
+}
+
+
+void loop () {
+  runner.execute();
+}