Issues

• ATtiny 2 series RTC prescaler value incorrect, millis() and delay() run 32X faster than nominal.

  SpenceKonde/megaTinyCore#1288 · Filter by author burnsb opened on Aug 11, 2026
  3

• ATtiny1614: micros() runs ~37.5% fast despite correct CPU clock

  SpenceKonde/megaTinyCore#1287 · Filter by author Amaruq-code opened on Aug 7, 2026
  4

• Error downloading http://drazzy.com/package_drazzy.com_index.json

  SpenceKonde/megaTinyCore#1283 · Filter by author Matthewslew opened on Jun 23, 2026
  2

• postobjcopy patterns on macOS fail with spaces in build path

  SpenceKonde/megaTinyCore#1281 · Filter by author kieraneglin opened on Jun 18, 2026

• tips on how to install Arduino IDE v1.8.13 on modern distribution

  SpenceKonde/megaTinyCore#1280 · Filter by author UltraMej opened on Jun 3, 2026
  1

• OneWire library (PaulStoffregen) silently broken on tinyAVR 2-series — PR #94 never merged, library uses classic AVR register offsets

  SpenceKonde/megaTinyCore#1279 · Filter by author ammaree opened on May 27, 2026

• Arduino 2.3.8 latest version of library is 2.6.10

  SpenceKonde/megaTinyCore#1278 · Filter by author ammaree opened on May 25, 2026
  1

• megaTinyCore: newer megaavr versions fail to install on AARCH64 Linux due to incorrect GCC host triplet

  SpenceKonde/megaTinyCore#1277 · Filter by author josefwegner opened on May 24, 2026

• Adding a debugging interface for the Arduino IDE 2

  SpenceKonde/megaTinyCore#1276 · Filter by author felias-fogg opened on May 20, 2026
  2

• When uploading to ATtiny817 Xplained Mini avrdude coughs

  SpenceKonde/megaTinyCore#1274 · Filter by author felias-fogg opened on May 20, 2026

• ATTiny816 RS-485 reception not without sending first

  SpenceKonde/megaTinyCore#1272 · Filter by author SilentResonance opened on May 17, 2026

• readSupplyVoltage() clobbers DAC0REFSEL

  SpenceKonde/megaTinyCore#1271 · Filter by author jamcinnes2 opened on May 12, 2026

• Attiny1624 programming fails in Ubuntu

  SpenceKonde/megaTinyCore#1267 · Filter by author giusmos opened on Feb 22, 2026
  2

• Can't access WOA and WOB (TDC0) in ATTiny1616

  bug
  SpenceKonde/megaTinyCore#1266 · Filter by author schwghrt opened on Feb 13, 2026
  1

• analogReadEnh1 not working on ATTiny1616

  bug
  SpenceKonde/megaTinyCore#1264 · Filter by author schwghrt opened on Feb 10, 2026
  2

• warning during a bitwise comparison in line 701 of wiring_analog.c

  bug
  SpenceKonde/megaTinyCore#1261 · Filter by author mikrocoder opened on Jan 25, 2026

• Port interrupt.

  documentation
  SpenceKonde/megaTinyCore#1258 · Filter by author TomGitHub01 opened on Dec 23, 2025
  2

• Cannot flash attiny1616 with arduino mega jtag2updi

  SpenceKonde/megaTinyCore#1256 · Filter by author MeisterQ opened on Dec 13, 2025
  3

• 1-Wire not working (tiny1614 on PA5)

  SpenceKonde/megaTinyCore#1253 · Filter by author VigonOracle opened on Nov 3, 2025
  1

• #error "CLOCK_SOURCE not defined.

  Non-ArduinoIDE onlyquestion/tech support
  SpenceKonde/megaTinyCore#1250 · Filter by author wholder opened on Oct 26, 2025
  2

• PTC anomaly with channels above 8

  SpenceKonde/megaTinyCore#1248 · Filter by author ZimM-LostPolygon opened on Oct 17, 2025
  7

• AStyle format test action is busted for some reason

  bugcritical
  SpenceKonde/megaTinyCore#1242 · Filter by author SpenceKonde opened on Jul 26, 2025

• ATtiny804, relocation truncated to fit: R_AVR_13_PCREL against `no symbol'. 75% memory used. Adding more code fixes it.

  criticalNot our bug
  SpenceKonde/megaTinyCore#1222 · Filter by author dalegrover opened on Apr 4, 2025
  1

• Adopt avrdude 7.2 release

  DxCore Tooenhancement
  SpenceKonde/megaTinyCore#919 · Filter by author mcuee opened on Mar 13, 2023 · 2.7.0
  11

• add Sleep-with-millis and power-saving library, understand & document power-saving modes

  DxCore Tooenhancement
  SpenceKonde/megaTinyCore#158 · Filter by author SpenceKonde opened on Apr 2, 2020 · Some Future Version
  30