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A python class to control Delcom USBLMP Products 904x multi-color, USB, visual signal indicators

Project description


delcom904x is a python class to control the Delcom Products 904x series multi-color visual signal indicators. These are USB HID devices that are easily programmable on most platforms.

It has been tested with the 904005-SB but should work with any of the other models without any issues. Currently if you have a green, red and yellow indicator, substitute --blue for yellow (they're wired the same).


cython-hidapi - Cross platform library to control USB HID devices.

hidapi - Python wrapper for the hidapi


    $ pip install delcom904x
    $ ./ --green --red --flash --cycle

Example Usage

import delcom904x
light = delcom904x.DelcomMultiColorIndicator()
light.set_color(, flashing = true)

udev Notes

On Linux machines, the default udev rulesets may set the permissions on the device to only be accessible to the root user. Add the following rule to /etc/udev/rules.d/ and re-plugin the indicator to allow all users to access the device (optionally, consider changing MODE="0666" to GROUP="dialout" to allow only the dialout group access).

    SUBSYSTEMS=="usb", ATTRS{idVendor}=="0fc5", ATTRS{idProduct}=="b080", MODE="0666"

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