Corsair Power Supplies May Soon See Sensor Support Exposed Under Linux
Select high-end Corsair power supplies such as their RMi / HXi / AXi series are able to expose various sensor metrics via USB interface to the system. To date this sensor functionality has only worked under Windows with their proprietary software but now an open-source driver is seeking mainline inclusion for supporting these sensors under Linux.
Independent developer Wilken Gottwalt reverse-engineered the micro-controller found on the Corsair RMi/HXi/AXi power supplies and found it to be a proprietary but simple USB HID protocol. The controller exposes temperatures, current, and voltage levels along with other information like power uptime, power used, and power supply fan speed. This protocol on select models can also allow configuring the fan mode and mono/multi-rail voltage handling, and over-current protection.
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