#include <Arduino_FreeRTOS.h>

TaskHandle_t Task1_handle;

void setup() {
  Serial.begin(9600);

  xTaskCreate(Task1, "print task", 128, NULL, 2, &Task1_handle);
  xTaskCreate(Task2, "print task", 128, NULL, 2, NULL);
}

void loop() {
  // put your main code here, to run repeatedly:

}

void Task1 (void *pvParameters) {
  while(1) {
    if (ulTaskNotifyTake(
      pdTRUE,         //RTOS task notif value is reset to 0 before ulTNT exits
      portMAX_DELAY)) //blocking time
      {
        Serial.println("Notification Received.");
      }
  }
}

void Task2 (void *pvParameters) {
  while(1) {
    //send task notification to task 1 while using its handle
    xTaskNotifyGive(Task1_handle);
    vTaskDelay(5000/portTICK_PERIOD_MS);
  }
}