The official Arduino website maintains a legacy archive at: https://www.arduino.cc/en/software/old-software

As of 2025, these files are still hosted on Arduino’s static servers. The SHA-256 checksums are also provided to verify integrity.

Windows: d9881c0f1eecb191ea3a911a314b217f3c0097c2cfa306fb661badb59bcbe1e2 Mac: 7d0b045ec9f30fabea0c7a8e3508a3ee2f2fd479ae6329c48ff6290cf1b16a85 Linux 64: 13a9dfba5dfc6d176e525e9d25b5ddbde4c13c5a9c53701767d1cddfdaaf10e0

software is no longer the primary version hosted on the main Arduino Software page . Instead, it is maintained within the Arduino Previous IDE Releases Download Sources Official Archive: The safest method is via the official Arduino website's "Previous IDE Releases" section GitHub Repository:

In these cases, the fastest solution is to rewrite the library, but to use the vintage IDE it was designed for.