Boards Packages for Arduino-compatible boards by Elektor

These are the files needed to install the Elektor Uno R4, AVR Playground, Platino and eRIC Nitro boards in the Arduino IDE v1.8.0 and up. (Actually, this also works for versions 1.6.10 and up, but not for versions 1.7.x.).

AVR Playground, Platino, eRIC Nitro

Paste the link https://github.com/ElektorLabs/Arduino/releases/download/v1.0.1/package_elektor_index.json into the Arduino IDE's Aditional Boards Manager URLs box on the File -> Preferences dialog. Then open the Tools -> Board -> Boards Manager, select the board(s) you want and click install. If you have the option to choose a version, choose the highest version.

Elektor Uno R4

Paste the link https://github.com/ElektorLabs/Arduino/releases/download/v1.0.1/package_elektor_uno_r4_1_8_x_index.json into the Arduino IDE's Aditional Boards Manager URLs box on the File -> Preferences dialog. Then open the Tools -> Board -> Boards Manager, select the Elektor Uno R4 (maybe in a submenu) and click install. If you have the option to choose a version, choose the highest version.