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aquacomputer-quadro-guide.md

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Aquacomputer Quadro 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 Quadro (experimental)
├── Firmware version           1032
└── Serial number       23410-65344

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

Monitoring

The Quadro exposes four temperature sensors and four groups of fan sensors for optionally connected fans. These groups provide RPM speed, voltage, current and power readings:

# liquidctl status
Aquacomputer Quadro (experimental)
├── Sensor 3          15.9  °C
├── Soft. Sensor 2      40.3  °C 
├── Soft. Sensor 3      50.0  °C 
├── Soft. Sensor 13     50.0  °C 
├── Fan 1 speed          0  rpm
├── Fan 1 power       0.00  W
├── Fan 1 voltage     0.00  V
├── Fan 1 current     0.00  A
├── Fan 2 speed          0  rpm
├── Fan 2 power       0.00  W
├── Fan 2 voltage    12.07  V
├── Fan 2 current     0.00  A
├── Fan 3 speed        360  rpm
├── Fan 3 power       0.00  W
├── Fan 3 voltage    12.07  V
├── Fan 3 current     0.00  A
├── Fan 4 speed          0  rpm
├── Fan 4 power       0.00  W
├── Fan 4 voltage    12.07  V
├── Fan 4 current     0.00  A
└── Flow sensor          0  dL/h

Changed in 1.12.0: read virtual temperature sensors as well.

Programming the fan speeds

Currently, four 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 Quadro are fan1 through fan4.

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.