Simple python script to control Linak powered desks and USB2LIN06 cable.

Requirements

• Linak desk ;)

• USB2LIN06 device

• Python

• pyusb

Usage

Currently, script have two available commands: status and move.

Invoking status will give information about desk height - both in absolute number, and in centimeters, and information if desk is moving.

$ linak_ctrl.py status
Position: 767, height: 78.80cm, moving: False

Note, that height was measured manually and may differ depending if desk have casters or regular foots.

Command status accept optional parameter --loop for fetching information from USB2LIN06 device every 0.2 seconds:

$ linak_ctrl.py status -l
Position: 2161, height: 100.25cm, moving: True
Position: 2109, height: 99.45cm, moving: True
Position: 2026, height: 98.17cm, moving: True
Position: 1960, height: 97.15cm, moving: True
Position: 1872, height: 95.80cm, moving: True
Position: 1797, height: 94.65cm, moving: True
Position: 1728, height: 93.58cm, moving: True
Position: 1675, height: 92.77cm, moving: True
Position: 1652, height: 92.42cm, moving: True
Position: 1651, height: 92.40cm, moving: False

Command move is used for adjusting desk height. It needs parameter position, which is absolute number, and its range is between 0 and 6480 (in my case). For example:

$ linak_ctrl.py move 1000

For displaying debug information verbosity can be increased using --verbose parameter:

$ linak_ctrl.py -v move 1000
Current position: 771
Current position: 792
Current position: 825
Current position: 873
Current position: 939
Current position: 988
Current position: 1000

Adding more -v will increase amount of information:

$ linak_ctrl.py -vv move 1000
array('B', [4, 56, 17, 8, 3, 3, 0, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 771
array('B', [4, 56, 17, 0, 21, 3, 0, 129, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 789
array('B', [4, 56, 17, 0, 55, 3, 0, 205, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 823
array('B', [4, 56, 17, 0, 101, 3, 16, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 869
array('B', [4, 56, 17, 0, 162, 3, 16, 92, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 930
array('B', [4, 56, 17, 0, 217, 3, 0, 170, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 985
array('B', [4, 56, 17, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0])
Current position: 1000

Alternatives

There are two projects, which more or less are doing the same. Fist one can be treated as a reference project - lots of information in the source code, second one is a python project, which uses libusb1 wrapper library instead of pyusb:

• usb2lin06-HID-in-linux-for-LINAK-Desk-Control-Cable

• python-linak-desk-control

License

This software is licensed under 3-clause BSD license. See LICENSE file for details.