bluetooth.js

/*
 Chrome Packaged app Bluetooth API test
 Before interacting with a BT device, you need to : 
   1) get the device MAC and service UUID with startDiscovery and getServices methods
   2) request permission with chrome.permissions.request
   3) add the service profile with chrome.bluetooth.addProfile (a profile is only {uuid:'xxxxxxx...'})
*/

// onConnection callback
chrome.bluetooth.onConnection.addListener(
  function(socket) {
    console.log('onConnection:', socket);
    chrome.bluetooth.read({
        socket: socket
    }, function() {
        console.log('BT read:', arguments);
    });
    // chrome.bluetooth.write({
    //     socket: socket,
    //     data: arrayBuffer
    // }, function() {
    //     console.log('write BT', arguments);
    // })
});

// onAdapterStateChanged callback (wifi card)
chrome.bluetooth.onAdapterStateChanged.addListener(function(newStatus) {
    console.log('onAdapterStateChanged:', arguments);
});

// discover devices 
chrome.bluetooth.startDiscovery({
    deviceCallback: function(device) {
        console.log('deviceCallback:', device);
        // discover services
        chrome.bluetooth.getServices({
            deviceAddress: device.address
        }, function(services) {
            console.log('getServices:', device.name, arguments);
            var service = services[1];
            // try to connect to service
            // Wii service name is "Nintendo RVL-CNT-01"
            chrome.bluetooth.connect({
                deviceAddress: device.address,
                serviceUuid: service.uuid
            }, function() {
                console.log('connect:', arguments);
            })
            
        })
    }
}, function() {
    console.log('callback', arguments);
});

// ask permission to access a device
chrome.permissions.request({
        permissions: [{
            'bluetoothDevices': [{
                'deviceAddress': address
            }]
        }]
      },
      function(granted) {
        console.log('device granted:', granted);
      }
);

// add profile to local profiles (needed)
chrome.bluetooth.addProfile(profile, function() {
    console.log('profile added', arguments);
    // now you can connect
});