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Hi, I also tried to use the hokuyo node without success. I asked Hokuyo the usb specifications of the UST-05LN and that is what they answer me :
UST-05LN is not designed to support distance data output. Therefore, we have no communication protocol specification for this model. If you need distance data, please consider of using UST-10/20LX or UST-05LA. I am sorry for the inconvenience.
However, we can visualize data from the AreaDesigner. So I sniffed a bit the data exchanged over USB when using this software, and I write this piece of code : https://gist.github.com/Fabien-B/87e57316e5b265ca42d179f3c860f879
I just started to do this few hours ago, so there is a lot more work to do to have a full support of the sensor functionalities, however it should be sufficient to retrieve the measurement data.