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Aquacomputer Octo fan controller

Driver API and source code available in liquidctl.driver.aquacomputer.

New in 1.11.0.

Initialization

Initialization is currently not required, but is recommended. It outputs the firmware version:

# liquidctl initialize
Aquacomputer Octo (experimental)
├── Firmware version           1019
└── Serial number       14994-51690

The Octo automatically sends a status HID report every second as soon as it's connected.

Monitoring

The Octo exposes four temperature sensors and eight groups of fan sensors for optionally connected fans. It also supports sixteen virtual temperature sensors, which are user assigned. Currently, they can only be read from the device. These groups provide RPM speed, voltage, current and power readings:

# liquidctl status
Aquacomputer Octo (experimental)
├── Sensor 1          37.0  °C
├── Soft. Sensor 2     2.9  °C
├── Soft. Sensor 8    40.7  °C
├── Fan 1 speed          0  rpm
├── Fan 1 power       0.00  W
├── Fan 1 voltage    12.09  V
├── Fan 1 current     0.00  A
├── Fan 2 speed          0  rpm
├── Fan 2 power       0.00  W
├── Fan 2 voltage     0.00  V
├── Fan 2 current     0.00  A
├── Fan 3 speed          0  rpm
├── Fan 3 power       0.00  W
├── Fan 3 voltage     0.00  V
├── Fan 3 current     0.00  A
├── Fan 4 speed          0  rpm
├── Fan 4 power       0.00  W
├── Fan 4 voltage     0.00  V
├── Fan 4 current     0.00  A
├── Fan 5 speed          0  rpm
├── Fan 5 power       0.00  W
├── Fan 5 voltage     0.00  V
├── Fan 5 current     0.00  A
├── Fan 6 speed          0  rpm
├── Fan 6 power       0.00  W
├── Fan 6 voltage     0.00  V
├── Fan 6 current     0.00  A
├── Fan 7 speed          0  rpm
├── Fan 7 power       0.00  W
├── Fan 7 voltage     0.00  V
├── Fan 7 current     0.00  A
├── Fan 8 speed          0  rpm
├── Fan 8 power       0.02  W
├── Fan 8 voltage    12.09  V
└── Fan 8 current     0.00  A

Changed in 1.12.0: read virtual temperature sensors as well.

Programming the fan speeds

Currently, eight optionally connected fans can be set to a fixed duty cycle, ranging from 0-100%.

# liquidctl set fan1 speed 56
                ^^^^       ^^
               channel    duty

Valid channel values on the Octo are fan1 through fan8.

Interaction with Linux hwmon drivers

Aquacomputer devices are supported by the mainline Linux kernel with its aquacomputer_d5next driver, and status data is provided through a standard hwmon sysfs interface.

Liquidctl automatically detects when a kernel driver is bound to the device and, whenever possible, uses it instead of directly accessing the device. Alternatively, direct access to the device can be forced with --direct-access.

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