#include <Ticker.h>
#define LED_BUILTIN1 13

char msg[50] = { 0, };

void message();
void flip();
void restart_msg();
void led_off();

Ticker ticker1;
Ticker ticker2;
Ticker ticker3;

int count1 = 0;
int count2 = 0;

void restart_msg() {
  Serial.println("\t attach ticker2->message() with period 0.5s");
  ticker2.attach(0.5, message);
  count2 = 0;
}

void flip() {
  //int state = digitalRead(LED_BUILTIN1);  // get the current state of GPIO1 pin
  //digitalWrite(LED_BUILTIN1, !state);     // set pin to the opposite state
  digitalWrite(LED_BUILTIN1, HIGH);     // set pin to the opposite state
  ticker3.once_ms(90, led_off);
 
  ++count1;
  // when the counter reaches a certain value, start blinking like crazy
  if (count1 == 10) {
    ticker1.attach(1, flip);
  }
  // when the counter reaches yet another value, stop blinking
  else if (count1 == 20) {
    ticker1.attach(3, flip);
    count1 = 0;
  }
}

void led_off() {
  digitalWrite(LED_BUILTIN1, LOW);
}
void message() {
  //Serial.print("Callback from ticker2->mesage(), count2="); Serial.println(count2);
  // Serial.println(msg);

  sprintf(msg, "Callback from ticker2->mesage(), count2=%d", count2);
  printf("%s\n", msg);
 
  ++count2;
  // when the counter reaches a certain value, send message every 200 ms
  if (count2 == 20) {
    Serial.println("\t set ticker2 period to 0.2s");
    ticker2.attach(0.2, message);
  }
  // when the counter reaches yet another value, stop sending
  else if (count2 == 50) {
    Serial.println("\t ticker2.once->restart_msg() started with delay 10s");
    //ticker2.detach();
    ticker2.once(10.0, restart_msg);
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(LED_BUILTIN1, OUTPUT);
  ticker1.attach(0.3, flip);      // flip1() every 0.3s
  ticker2.attach(0.5, message);   // message() every 0.4s
}

void loop() {
  // nothing to do!
}