extern "C" {
#include "log.h"
}

static FILE uartout = {0} ;

static int uart_putchar (char c, FILE *stream)
{
  Serial.write(c) ;
  return 0 ;
}

void setup() {
  Serial.begin(115200);
  fdev_setup_stream (&uartout, uart_putchar, NULL, _FDEV_SETUP_WRITE);
  stdout = &uartout ;

  log_init();
  log_set_topic_mask(0xFFFF);
  log_set_level(LOG_LEVEL_DEBUG);

  LOG_DEBUG(LOG_TOPIC_NET, "visible");
  LOG_INFO(LOG_TOPIC_SENSOR, "visible");
  LOG_ERROR(LOG_TOPIC_CTRL, "visible");

  log_set_level(LOG_LEVEL_ERROR);
   
  LOG_DEBUG(LOG_TOPIC_NET, "invisible");
  LOG_INFO(LOG_TOPIC_SENSOR, "invisible");
  LOG_ERROR(LOG_TOPIC_CTRL, "visible");

  log_set_level(LOG_LEVEL_DEBUG);
  log_disable_topic(LOG_TOPIC_SENSOR);

  LOG_DEBUG(LOG_TOPIC_NET, "visible");
  LOG_INFO(LOG_TOPIC_SENSOR, "invisible");
  LOG_ERROR(LOG_TOPIC_CTRL, "visible");

  log_enable_topic(LOG_TOPIC_SENSOR);

  LOG_INFO(LOG_TOPIC_SENSOR, "visible");

  LOG_ERROR(123, "visible  but topic err");
  LOG(LOG_TOPIC_SENSOR, 0, "visible but level err");
  LOG(123, 0, "visible but both err");

  log_set_level(LOG_LEVEL_NONE);

  LOG_INFO(LOG_TOPIC_SENSOR, "invisible");
}

void loop() {
}