ATtinyCore (Universal) works with all versions of the official IDE (from arduino.cc ) from version 1.6.3 onwards. For board manager installation, 1.6.4 or later is required. Due to serious bugs introduced in 1.6.6, 1.6.7, and 1.6.8, version 1.6.5r5 of the IDE is recommended - though these bugs do not specifically impact this core.
This core can be installed using the board manager. The board manager URL is:
http://drazzy.com/package_drazzy.com_index.json
- File -> Preferences, enter the above URL in "Additional Board Manager URLs"
- Tools -> Boards -> Board Manager... *If using 1.6.6, close board manager and re-open it (see below)
- Select ATtinyCore (Universal) and click "Install".
Due to a bug in 1.6.6 of the Arduino IDE, new board manager entries are not visible the first time Board Manager is opened after adding a new board manager URL.
Option 1: Download the .zip, extract, and place in the hardware folder inside arduino in your documents folder. (if there is no (documents)/arduino/hardware, create it)
Option 2: Download the github client, and sync this repo to (documents)/arduino/hardware.
