Installer Requirement:

CP210x Universal COM Port Driver

OSSM Sauce App v1.3

Firmware Installer

Make sure to close anything else using your device's COM port (e.g. Serial Monitor).

If install gets stuck on "Preparing installation" close your browser and try again.

Select firmware to install:

• OSSM Sauce Firmware v1.4
• Research And Desire OSSM Firmware (Updated 6/18/25)