Issues

• Compilation warning: unused parameter 'size'

  bug
  arduino/ArduinoCore-avr#623 · Filter by author martin-eden opened on May 14, 2026

• Add long long support to Print::print

  enhancement
  arduino/ArduinoCore-avr#620 · Filter by author sadr0b0t opened on Apr 19, 2026

• Version 1.8.7 does not upload on macOS Tahoe

  bugdependencies
  arduino/ArduinoCore-avr#618 · Filter by author sly74fr opened on Apr 15, 2026

• dpinst.exe runs indefinitely and consumes all RAM when restricted Windows account installs platform

  bug
  arduino/ArduinoCore-avr#608 · Filter by author UNISTRAPHIOlivier opened on Oct 22, 2025
  3

• Potential typo/bug in HardwareSerial::_tx_udr_empty_irq?

  bug
  arduino/ArduinoCore-avr#602 · Filter by author ziriax opened on Sep 30, 2025
  4

• write() doesn't return actually sent bytes in case of buffer overflow

  arduino/ArduinoCore-avr#597 · Filter by author Lasanyan opened on May 26, 2025
  1

• Provide more comprehensive documentation for building arduino-usbserial firmware

  documentationenhancement
  arduino/ArduinoCore-avr#596 · Filter by author Pcdwarf opened on Mar 6, 2025
  1

• Potential Issue in I2C Timeout

  arduino/ArduinoCore-avr#592 · Filter by author ghost opened on Jan 18, 2025
  1

• Use communication interface classes from ArduinoCore API

  enhancement
  arduino/ArduinoCore-avr#580 · Filter by author Guswib opened on Dec 2, 2024

• Serial: recommended updates for higher efficiency/utility, particularly w.r.t. buffers

  enhancement
  arduino/ArduinoCore-avr#579 · Filter by author pcdangio opened on Nov 27, 2024
  2

• Upload fails when AVRDUDE 8.x format global .avrduderc is present on system

  bug
  arduino/ArduinoCore-avr#576 · Filter by author UffeJakobsen opened on Oct 30, 2024
  1

• Add a function returning currently used analogRead resolution

  enhancement
  arduino/ArduinoCore-avr#563 · Filter by author 4project-co-il opened on Jun 7, 2024
  1

• STK600 support

  enhancement
  arduino/ArduinoCore-avr#556 · Filter by author zarpli opened on Mar 13, 2024

• USB enumeration timeouts due to missing ZLPs

  bug
  arduino/ArduinoCore-avr#553 · Filter by author tlyu opened on Feb 1, 2024
  4

• Wire library read() returns 0xFF on reading only one byte

  bug
  arduino/ArduinoCore-avr#549 · Filter by author velechit opened on Dec 15, 2023
  2

• USB suspend not implemented

  arduino/ArduinoCore-avr#544 · Filter by author Dakkaron opened on Sep 12, 2023

• Stream::find does incorrect comparison

  bug
  arduino/ArduinoCore-avr#541 · Filter by author NathanSweet opened on Sep 6, 2023
  1

• Wstring: getBytes() method is not clear to use with passing number of bytes to fill in buffer

  arduino/ArduinoCore-avr#537 · Filter by author Croody opened on Jun 20, 2023

• Update bootloaders

  enhancement
  arduino/ArduinoCore-avr#535 · Filter by author mirh opened on May 18, 2023
  5

• -DCDC_DISABLED not working

  bug
  arduino/ArduinoCore-avr#534 · Filter by author Phoen11xx opened on May 15, 2023
  6

• Make your Uno Kit USB serial firmware missing ?

  arduino/ArduinoCore-avr#527 · Filter by author shaminalimv opened on Mar 17, 2023
  1

• elf files for bootloaders

  enhancement
  arduino/ArduinoCore-avr#521 · Filter by author zemanj opened on Jan 25, 2023
  1

• GPG signatures missing for versions 1.8.5 and 1.8.6

  arduino/ArduinoCore-avr#519 · Filter by author M-Reimer opened on Dec 28, 2022

• USB Serial on 32U4 stops incrementing Serial.available() if serial buffer has ≥2 bytes in it and more are received

  arduino/ArduinoCore-avr#516 · Filter by author AnasMalas opened on Dec 25, 2022
  4

• Fixed-width integer type aliases are leaked from USBAPI.h

  arduino/ArduinoCore-avr#510 · Filter by author inicula opened on Nov 5, 2022
  2