public SpineObject decode(Node node, byte[] payload) throws PacketDecodingException {
BufferedRawData data = new BufferedRawData();
data.baseInit(node, payload);
// data.setFunctionCode(SPINEFunctionConstants.BUFFERED_RAW_DATA);
short pldIndex = 2;
byte sensorCode = (byte) (payload[pldIndex] >> 4);
data.setSensorCode(sensorCode);
byte channelBitmask = (byte) (payload[pldIndex++] & 0x0F);
data.setChannelBitmask(channelBitmask);
byte dataWordLength = payload[pldIndex++];
data.setDataWordLength(dataWordLength);
pldIndex++; // skip MSB of the bufferSize because it will be always 0
int bufferSize = payload[pldIndex++];
int[][] values = new int[SPINESensorConstants.MAX_VALUE_TYPES][];
// if the actual sensor readings data ((payload.length - pldIndex) bytes)
// in the payload is less than what is declared (by channelBitmask, bufferSize, and
// dataWordLength)
// then this message is somehow malformed or corrupted.
if (((payload.length - pldIndex)
< (SPINESensorConstants.countChannelsInBitmask(channelBitmask)
* bufferSize
* dataWordLength)))
throw new PacketDecodingException(
"Malformed or corrupted BufferedRawData message received "
+ "[from node: "
+ node.getPhysicalID()
+ "]");
byte[] dataTmp = new byte[4];
for (int i = 0; i < SPINESensorConstants.MAX_VALUE_TYPES; i++) {
if (SPINESensorConstants.chPresent(i, channelBitmask)) {
values[i] = new int[bufferSize];
for (int j = bufferSize - 1; j >= 0; j--) {
if (dataWordLength == 1) {
dataTmp[3] = payload[pldIndex++];
dataTmp[2] = 0;
dataTmp[1] = 0;
dataTmp[0] = 0;
} else if (dataWordLength == 2) {
dataTmp[3] = payload[pldIndex++];
dataTmp[2] = payload[pldIndex++];
dataTmp[1] = 0;
dataTmp[0] = 0;
} else if (dataWordLength == 3) {
dataTmp[3] = payload[pldIndex++];
dataTmp[2] = payload[pldIndex++];
dataTmp[1] = payload[pldIndex++];
dataTmp[0] = 0;
} else if (dataWordLength == 4) {
dataTmp[3] = payload[pldIndex++];
dataTmp[2] = payload[pldIndex++];
dataTmp[1] = payload[pldIndex++];
dataTmp[0] = payload[pldIndex++];
}
values[i][j] = Data.convertFourBytesToInt(dataTmp, 0);
}
}
}
data.setValues(values);
return data;
}
public void discoveryCompleted(Vector activeNodes) {
// we loop over the discovered nodes (hopefully, at least a node's showed up!)
Node curr = null;
for (int j = 0; j < activeNodes.size(); j++) {
curr = (Node) activeNodes.elementAt(j);
// we print for each node its details (nodeID, sensors and functions provided)
System.out.println(curr);
// for each node, we look for specific services
for (int i = 0; i < curr.getSensorsList().size(); i++) {
byte sensor = ((Sensor) curr.getSensorsList().elementAt(i)).getCode();
// if the current node has an accelerometer, then...
if (sensor == SPINESensorConstants.ACC_SENSOR) {
// ... we first setup that sensor, specifying its sampling time and time scale; then ...
SpineSetupSensor sss = new SpineSetupSensor();
sss.setSensor(sensor);
sss.setTimeScale(SPINESensorConstants.MILLISEC);
sss.setSamplingTime(SAMPLING_TIME);
manager.setup(curr, sss);
// ... we can setup a specific function (in this case a Feature) on that sensor; then ...
FeatureSpineSetupFunction ssf = new FeatureSpineSetupFunction();
ssf.setSensor(sensor);
ssf.setWindowSize(WINDOW_SIZE);
ssf.setShiftSize(SHIFT_SIZE);
manager.setup(curr, ssf);
// ... we can activate that function with function specific parameters
// (for Feature they are the desired feature extractors); we can also ...
FeatureSpineFunctionReq sfr = new FeatureSpineFunctionReq();
sfr.setSensor(sensor);
sfr.add(
new Feature(
SPINEFunctionConstants.MODE,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.MEDIAN,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.MAX,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.MIN,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
manager.activate(curr, sfr);
// ... split a more complex activation in multiple activations
// (if the specific function implementation in the node side allows that); of course we
// always can ...
sfr = new FeatureSpineFunctionReq();
sfr.setSensor(sensor);
sfr.add(
new Feature(
SPINEFunctionConstants.MEAN,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.AMPLITUDE,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
manager.activate(curr, sfr);
// SetUp Alarm Engine
// Window and Shift may be set to value different from the feature engine ones.
// here we use the same values for debigging proposes
AlarmSpineSetupFunction ssf2 = new AlarmSpineSetupFunction();
ssf2.setSensor(sensor);
ssf2.setWindowSize(WINDOW_SIZE);
ssf2.setShiftSize(SHIFT_SIZE);
manager.setup(curr, ssf2);
// Activate alarm on MAX value (one of the features computed above) on CH1
// alarm sent when MAX > upperThresold
AlarmSpineFunctionReq sfr2 = new AlarmSpineFunctionReq();
int lowerThreshold = 20;
int upperThreshold = 40;
sfr2.setDataType(SPINEFunctionConstants.MAX);
sfr2.setSensor(SPINESensorConstants.ACC_SENSOR);
sfr2.setValueType((SPINESensorConstants.CH1_ONLY));
sfr2.setLowerThreshold(lowerThreshold);
sfr2.setUpperThreshold(upperThreshold);
sfr2.setAlarmType(SPINEFunctionConstants.ABOVE_THRESHOLD);
manager.activate(curr, sfr2);
// Activate alarm on AMPLITUDE value (one of the features computed above) on CH2
// alarm sent when AMPLITUDE < lowerThreshold
lowerThreshold = 2000;
upperThreshold = 1000;
sfr2.setDataType(SPINEFunctionConstants.AMPLITUDE);
sfr2.setSensor(SPINESensorConstants.ACC_SENSOR);
sfr2.setValueType((SPINESensorConstants.CH2_ONLY));
sfr2.setLowerThreshold(lowerThreshold);
sfr2.setUpperThreshold(upperThreshold);
sfr2.setAlarmType(SPINEFunctionConstants.BELOW_THRESHOLD);
manager.activate(curr, sfr2);
}
// repeat this process for other desired sensors; after that we can finally ...
else if (sensor == SPINESensorConstants.INTERNAL_TEMPERATURE_SENSOR) {
SpineSetupSensor sss = new SpineSetupSensor();
sss.setSensor(sensor);
sss.setTimeScale(SPINESensorConstants.MILLISEC);
sss.setSamplingTime(OTHER_SAMPLING_TIME);
manager.setup(curr, sss);
FeatureSpineSetupFunction ssf = new FeatureSpineSetupFunction();
ssf.setSensor(sensor);
ssf.setWindowSize(OTHER_WINDOW_SIZE);
ssf.setShiftSize(OTHER_SHIFT_SIZE);
manager.setup(curr, ssf);
FeatureSpineFunctionReq sfr = new FeatureSpineFunctionReq();
sfr.setSensor(sensor);
sfr.add(
new Feature(
SPINEFunctionConstants.MODE,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.MEDIAN,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.MAX,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
sfr.add(
new Feature(
SPINEFunctionConstants.MIN,
((Sensor) curr.getSensorsList().elementAt(i)).getChannelBitmask()));
manager.activate(curr, sfr);
// SetUp Alarm Engine
// Same Window and Shift as before
AlarmSpineSetupFunction ssf3 = new AlarmSpineSetupFunction();
ssf3.setSensor(sensor);
ssf3.setWindowSize(WINDOW_SIZE);
ssf3.setShiftSize(SHIFT_SIZE);
manager.setup(curr, ssf3);
// Activate alarm on MIN value (one of the features computed above)on CH1
// alarm sent when lowerThreshold < MIN < upperThreshold
AlarmSpineFunctionReq sfr3 = new AlarmSpineFunctionReq();
int lowerThreshold = 1000;
int upperThreshold = 3000;
sfr3.setDataType(SPINEFunctionConstants.MIN);
sfr3.setSensor(sensor);
sfr3.setValueType((SPINESensorConstants.CH1_ONLY));
sfr3.setLowerThreshold(lowerThreshold);
sfr3.setUpperThreshold(upperThreshold);
sfr3.setAlarmType(SPINEFunctionConstants.IN_BETWEEN_THRESHOLDS);
manager.activate(curr, sfr3);
}
}
}
// ... start the sensor network sensing and computing our aforeactivated services.
if (activeNodes.size() > 0)
manager.startWsn(
true,
true); // we can tune a few node parameters at run-time for reducing the power consumption
// and the packets drop.
}
