This version is ideal for older machines, running on Windows 7 and newer, macOS 10.8.3+, and various Linux distributions.
Many long-term projects and third-party libraries were originally developed and tested specifically on the 1.8.x framework. System Requirements arduino ide 1.8 0 download
While newer versions offer features like autocompletion and a live debugger, version 1.8.0 remains popular for several reasons: This version is ideal for older machines, running