#include <Arduino_FreeRTOS.h>
#include <queue.h>

QueueHandle_t xMailbox;
TaskHandle_t TaskHandle_1; // handler for Task1
TaskHandle_t TaskHandle_2; // handler for Task2

void setup() 
{
  Serial.begin(9600);
  while(!Serial); // wait for serial port to connect
  xMailbox = xQueueCreate(1, sizeof( int32_t));
  xTaskCreate(vUpdateMailbox, "Sender", 100, NULL, 1, &TaskHandle_1);
  xTaskCreate(vReadMailbox, "Receiver", 100, NULL, 1, &TaskHandle_2);
}

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

void vUpdateMailbox(void* pvParameters)
{
  int32_t ulNewValue = 1; 
  while(1)
  {
    xQueueOverwrite( xMailbox, &ulNewValue);
    Serial.println("Data written to mailbox");
    ulNewValue++;
    vTaskDelay(500);
  }
}

void vReadMailbox(void* pvParameters)
{
  int32_t value_received; 
  while(1)
  {
    xQueuePeek( xMailbox, &value_received, portMAX_DELAY );
    Serial.print("Data Read from mailbox = ");
    Serial.println(value_received);
    vTaskDelay(100);
  }
}