Issues

• Support for AVR DU series with USB ?

  Type-EnhancementType-newChip
  Feature

  Optiboot/optiboot#387 · Filter by author vslinuxdotnet opened on Jul 17, 2026
  1

• Infinite WDT Reset Loop After Software Jump into Bootloader

  Optiboot/optiboot#386 · Filter by author GregorB54321 opened on May 14, 2026
  3

• Optiboot doesn't fit in 512 bytes when compiled with Toolchain 4 (Avr-gcc v15.x)

  Maintainability
  Optiboot/optiboot#384 · Filter by author WestfW opened on Nov 30, 2025
  5

  

• Tweak so that optiboot can be used a sort of sub-module for Studio/MPLAB projects

  Component-DocsNo-binary-changePriority-LowType-Enhancement
  Optiboot/optiboot#382 · Filter by author WestfW opened on May 23, 2025
  

• Use pin to enter bootloader

  Component-MakefilesType-Enhancement
  Optiboot/optiboot#381 · Filter by author WestfW opened on May 22, 2025
  

• avr-dualboot based on optiboot

  AnnouncementNot-our-issuePermanentType-EnhancementWont-fix
  Optiboot/optiboot#376 · Filter by author storepeter opened on Mar 8, 2024

• MCUdude's cores no longer use optiboot

  Permanent
  Optiboot/optiboot#372 · Filter by author vanyasem opened on Oct 21, 2023
  1

• Advice: Points corresponding to AVR_Ex series

  Optiboot/optiboot#371 · Filter by author askn37 opened on Oct 21, 2023
  1

• unable to build

  Optiboot/optiboot#370 · Filter by author quantrpeter opened on Jul 12, 2023
  2

  

• Incompatible or no bootloader present! Please burn correct bootloader

  Optiboot/optiboot#368 · Filter by author stoutouloutou opened on Feb 10, 2023
  1

• To release version 8.3.0 or 9.0.0

  Optiboot/optiboot#361 · Filter by author mcuee opened on Dec 22, 2022
  6

• To support LGT8F328P

  Optiboot/optiboot#359 · Filter by author mcuee opened on Dec 20, 2022
  10

• Better documentation for compiling optiboot

  Optiboot/optiboot#355 · Filter by author mcuee opened on Dec 10, 2022
  25

• Use SW reset request (on Mega0, xTiny) to start application?

  Optiboot-X-specificType-Enhancement
  Optiboot/optiboot#354 · Filter by author WestfW opened on Oct 23, 2022
  1

  

• optiboot_x fails for >48k of flash (ie xTiny, AVRDx64, AVRDx128)

  AnnouncementOptiboot-X-specificPermanent
  Optiboot/optiboot#353 · Filter by author WestfW opened on Oct 11, 2022
  6

  

• Run bootloader after a software reset

  Discussion
  Optiboot/optiboot#350 · Filter by author ghost opened on Jul 12, 2022
  3

• make ATTINY85 with RS485 retun error

  MaintainabilityPriority-LowRegressionType-Other
  Optiboot/optiboot#349 · Filter by author expertup opened on Jun 17, 2022
  7

• Building using MPLAB X IDE

  Component-MakefilesComponent-Scripts
  Optiboot/optiboot#344 · Filter by author ghost opened on May 18, 2022
  1

  

• Virtual Boot can easily brick the chip.

  Optiboot/optiboot#340 · Filter by author SpenceKonde opened on Apr 2, 2022
  23

• have a config file?

  Component-MakefilesType-Enhancement
  Optiboot/optiboot#337 · Filter by author WestfW opened on Jan 13, 2022
  2

  

• Cannot upload reliably using Bluetooth and an HC-05

  Optiboot/optiboot#334 · Filter by author mgurzixo opened on Nov 30, 2021
  3

• Customize bootloader for 328PB w RS485

  Discussion
  Optiboot/optiboot#305 · Filter by author mahtoyy opened on Feb 18, 2021
  9

• Compiling with WINAVR produces incorrect object code.

  MaintainabilityRegressionType-Defect
  Optiboot/optiboot#302 · Filter by author WestfW opened on Jan 12, 2021
  

• Optiboot grows bigger with (Arduino IDE) avr-gcc 7.3.0

  MaintainabilityPriority-MediumRegression
  Optiboot/optiboot#301 · Filter by author WestfW opened on Nov 10, 2020
  5

  

• optiboot.h if(read_character != 0 && read_character != 255)

  Component-ExamplesType-Other
  Optiboot/optiboot#299 · Filter by author SpenceKonde opened on Nov 1, 2020
  6