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_level(LOG_LEVEL_DEBUG);

  LOG_DEBUG("visible");
  LOG_INFO("visible");
  LOG_ERROR("visible");

  log_set_level(LOG_LEVEL_ERROR);
   
  LOG_DEBUG("invisible");
  LOG_INFO("invisible");
  LOG_ERROR("visible");

  log_set_level(LOG_LEVEL_DEBUG);
  
  LOG(0, "visible but level err");

  log_set_level(LOG_LEVEL_NONE);

  LOG_INFO("invisible");
}

void loop() {
}