#MyoCraft: Myo Armband With Node.js on Intel Edison Board

In this insctructable, I will show you how to control your Intel Edison Board with the movements of your hand and your arm, thanks to your Myo Armband.

The different steps described below use bluetooth protocol which connects Myo and Edison Board through Node.js.

In order to help you, I created a Github project that you can find below :

https://github.com/katlea/node-myo-edison

Step 1: Requirements

1. A Myo Armband : https://store.myo.com/?utm_source=Instructables&u...
2. Update to the latest Myo Firmware !
3. An Intel Edison Board
4. SSH or Serial access to your edison board

Step 2: Configure Intel Edison Board

First you need to start wifi on Edison board :

configure_edison --wifi

then follow the instructions on screen.

Optional : to enable SFTP access you need to activate a password on the board

configure_edison --password

then follow the instructions on screen.

Create a directory for the Node.js project

cd ~
mkdir myo
cd myo

Install Noble package in the project directory

npm install noble

We need to update the repository list on the Edison (if you have already not done that).

Start 'vi' editor to edit the file /etc/opkg/base-feeds.conf

vi /etc/opkg/base-feeds.conf

Then insert the content below :

src/gz all http://repo.opkg.net/edison/repo/all
src/gz edison http://repo.opkg.net/edison/repo/edison
src/gz core2-32 http://repo.opkg.net/edison/repo/core2-32

Now update opkg and then install Bluez package

Bluez package is for Bluetooth Low Energy control.

opkg update

opkg install bluez5-dev

Step 3: Configure Bluetooth Low Energy on Start

Original instructions to activate Bluetooth:

rfkill unblock bluetooth
killall bluetoothd
hciconfig hci0 up

You need to create a file in "/etc/init.d" to activate Bluetooth Low Energy on startup.

The file is called "ble".

Create a directory

cd /etc
mkdir init.d
cd init.d

Then edit "ble" file.

vi ble

Copy the file content below into "ble" file.

#!/bin/sh

start(){
     rfkill unblock bluetooth
     killall bluetoothd
     hciconfig hci0 up
     echo "ble up"
}

stop(){
     hciconfig hci0 down
     echo "ble down"
}

case "$1" in
     start)
          start
          ;;
     stop)
          stop
          ;;
     restart)
          stop
          start
          ;;
esac
exit 0

Enable "ble" file to be executable :

chmod +x ble

Then launch the file:

/etc/init.d/ble start

To launch the file on board startup:

update-rc.d ble defaults

Step 4: Install Script

Go into your project directory

cd ~
cd myo

Download myo.js from my github repository

https://github.com/katlea/node-myo-edison

Or from myo.js attachment

Then send it to the project directory (via SFTP for example)

Step 5: Enjoy Node.js Action

Create a file "app.js" in project directory.

And use the documentation below to fill it.

Then run :

node app.js

Usage

var myo = require('./myo.js');

CONNECT

Quick Connect

myo.quickConnect(function(err, id){
    console.log('myo unique id : ', id);
});

Classic Connect

myo.scan.start(function(err, data){
    console.log(err, data);
});
myo.event.on('ready', function(id){
    console.log('myo unique id : ', id);
});

DISCONNECT

myo.connected[id]..disconnect();

INITIATE

Initiate Myo to receive stream and data

myo.connected[id].unlock("hold", function() {
    // lock - time (will lock after inactivity) - hold
    myo.connected[id].sleepMode("forever", function () {
        // normal - forever (never sleep)
        myo.connected[id].setMode('send', 'all', 'enabled', function () {
            // emg : none - send - raw
            // imu : none - data - events - all - raw
            // classifier : enabled - disabled
            console.log('initiated');
        });
    });
});

INTERACTION

Get Name

myo.connected[id].generic.getName(function (err, data){ // Get device name
    console.log(err, data);
});

Set Name

myo.connected[id].generic.setName('Myo NAME', function (err, data){ // Set device name
    console.log(err, data);
});

Battery Info

myo.connected[id].battery(function(err, data) {
    console.log("battery : " + data + " %"); // data => battery in percent
});

Vibrate classic

myo.connected[id].vibrate("strong"); // light, medium, strong

Vibrate custom

myo.connected[id].vibrate2(1500, 255); // time in milliseconds, power 0 - 255

Vibrate notify

myo.connected[id].notify(); // notify :  short and light vibration

Deep sleep

myo.connected[id].deepSleep(function(){}); // go into deep sleep

Basic Info

myo.connected[id].info(function(err, data){
    console.log(err, data);
});

Firmware Info

myo.connected[id].firmware(function(err, data){
    console.log(err, data);
});

STREAM

Set "true" to get stream on events or "false" to disable.

imu (motion)

myo.connected[id].imu(true);

Classifier

myo.connected[id].classifier(true);

emg

myo.connected[id].emg(true);

EVENTS

myo.event.on('discover', function(id){
    console.log('discover', id);
});
myo.event.on('connect', function(id){
    console.log('connect', id);
});
myo.event.on('disconnect', function(id){
    console.log('disconnect', id);
});
myo.event.on('ready', function(id){
    console.log('peripheral ready :', id);
});
myo.event.on('imu', function(data){
    console.log('imu', data);
});
myo.event.on('classifier', function(data){
    console.log('classifier', data);
});
myo.event.on('emg4', function(data){
    console.log('emg', data);
});