myow

Myow (probably pronounced meow) is a command-line tool used to hook up the Myo armband as an input to Wekinator.

There is nothing complicated going on here. Wekinator expects incoming data on a specified OSC port. The Myo broadcasts websocket events with data from its sensors. Myow simply listens for the websocket data using myo.js and translates them to appropriate OSC messages using osc.js.

Basic instructions below, and checkout the basic tutorial.

Installation

Install the package globally via npm:

$ npm install -g myow

Usage

Note: myow requires Myo Connect to be running.

Look at the help output:

$ myow --help

  Usage: myow [options] [input]

  Send data from Myo to Wekinator.

  Input value can be one of [accelerometer|orientation|gyroscope|emg|imu] (default: imu)

  Options:

    -h, --help         output usage information
    -V, --version      output the version number
    --outhost [value]  The host on which to send OSC data (default: 127.0.0.1)
    --outport [n]      The port on which to send OSC data (default: 6448)
    --inhost [value]   The host on which to receive OSC data, if --receive-osc argument is present (default: 127.0.0.1)
    --inport [n]       The port on which to receive OSC data, if --receive-osc argument is present (default: 12000)
    -r, --receive-osc  If present, listen for OSC messages on --inport
    -l, --log          Log osc in/out to console.
    --login            Log osc input only to console.
    --logout           Log osc output only to console.

The [input] value lets us specify what stream of data to pass along to Wekinator. By default, it will use imu, which is a 10-dimensional vector composed of accelerometer, gyroscope, and orientation data. You can narrow down that data stream by specifying accelerometer, gyroscope, or orientation as the input. If you wish to use raw 8-dimensional EMG data, use emg as the input.

If you're not using the default hosts/ports in Wekinator, you can use the optional arguments to set custom values.

Examples

Start sending OSC messages containing all imu (inertial measurement unit) data to /wek/inputs using the default ports with no input/output logging:

$ myow

The imu data looks like: [ -0.52392578125, -0.0126953125, 0.76611328125, 8.1875, 81.1875, 3.0625, 0.59625244140625, -0.19793701171875, 0.16851806640625, 0.75946044921875 ]

Maybe we only want to use orientation data and log all outgoing OSC messages:

$myow -l orientation

Then we'll be sending only the last four elements of the imu data along: [0.59625244140625, -0.19793701171875, 0.16851806640625, 0.75946044921875 ]

Logging OSC messages

It can be helpful to inspect the stream of messages that are being sent and received via OSC. You can use --login, --logout, and -l to view input, output, and both message types, respectively.

By default myow will not listen for incoming OSC messages, so as not to interfere with any other applications you have set up to handle output from Wekinator. If you with to inspect what Wekinator is sending out, you can tell myow to receive OSC using the -r flag.

$ myow --login -r orientation