Is there Brown-out detection for Arduino Uno?

Using Arduino Microcontrollers
23

I think fuse setting has to be done in programming mode, which needs to be done via the ICSP interface, or a dedicated programmer. You can read fuses in an ordinary program. Example:

#include <avr/boot.h>

#define SIGRD 5

void setup ()
{
Serial.begin (115200);
Serial.println ();

Serial.println ("Signature");

byte sig;
  sig = boot_signature_byte_get (0);
  Serial.println (sig, HEX);
  sig = boot_signature_byte_get (2);
  Serial.println (sig, HEX);
  sig = boot_signature_byte_get (4);
  Serial.println (sig, HEX);

Serial.println ("Fuses");
byte fuse;
  
  fuse = boot_lock_fuse_bits_get (GET_LOW_FUSE_BITS);
  Serial.println (fuse, HEX);
  fuse = boot_lock_fuse_bits_get (GET_HIGH_FUSE_BITS);
  Serial.println (fuse, HEX);
  fuse = boot_lock_fuse_bits_get (GET_EXTENDED_FUSE_BITS);
  Serial.println (fuse, HEX);
  fuse = boot_lock_fuse_bits_get (GET_LOCK_BITS);
  Serial.println (fuse, HEX);
}

void loop () {}

You can get a $10 programmer board like the USBtinyISP or similar. You don't need another Arduino as such.

Certainly I'm getting programme corruption.

Could be a program bug. :slight_smile: