Raw Sensor Data ?

There is no access to the internal accelerometer data. You should be able to use the Ant module to listen to data from the heart rate monitor, but you'll have to do some reading to determine exactly how to do it. I'm pretty sure that the HRV app does exactly this.

Travis is right.

egvar antCh;


function onAntMsg(msg)
{
var payload = msg.getPayload();


if( Ant.MSG_ID_BROADCAST_DATA == msg.messageId ) {

var livePulse = payload[7].toNumber();
var beatEvent = ((payload[4] | (payload[5] << 8)).toNumber() * 1000) / 1024;
var beatCount = payload[6].toNumber();
}
else if( Ant.MSG_ID_CHANNEL_RESPONSE_EVENT == msg.messageId ) {
var event = payload[1].toNumber();
if( Ant.MSG_CODE_EVENT_RX_FAIL == event ) {
}
else if( Ant.MSG_CODE_EVENT_RX_FAIL_GO_TO_SEARCH == event ) {
}
else if( Ant.MSG_CODE_EVENT_RX_SEARCH_TIMEOUT == event ) {
}
}
}


function openCh() {
// Get the channel
var chanAssign = new Ant.ChannelAssignment(
Ant.CHANNEL_TYPE_RX_NOT_TX,
Ant.NETWORK_PLUS);


// Set the configuration
var deviceCfg = new Ant.DeviceConfig( {
:deviceNumber => 0,
:deviceType => 120,
:transmissionType => 0,
:messagePeriod => 8070,
:radioFrequency => 57,
:searchTimeoutLowPriority => 2,
:searchTimeoutHighPriority => 2,
:searchThreshold => 0} );


antCh = new Ant.GenericChannel(method(:onAntMsg), chanAssign);
antCh.setDeviceConfig(deviceCfg);
antCh.open();
}

great. do you have some documentation at hand for the ant specification ?
i.e. what are the various entries payload[1] ... [8] ?

It's all in here http://www.thisisant.com/developer/resources/downloads/#documents_tab You will need to create a developers account to access the resources.