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Java sensor poll and callback examples

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This commit is contained in:
Stefan Persson 2011-05-19 09:52:00 +00:00
parent 97e88a175f
commit a788753e8a
2 changed files with 154 additions and 0 deletions
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94
examples/java/sensors/SensorsJNACallback.java Normal file
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import java.io.*;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.ptr.*;
import com.sun.jna.Callback;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.Memory;
import java.util.Date;
public class SensorsJNACallback
{
public interface CLibrary extends Library {
static int TELLSTICK_TEMPERATURE = 1;
static int TELLSTICK_HUMIDITY = 2;
void tdInit();
void tdClose();
int tdRegisterSensorEvent(SensorCallback function, Pointer context);
int tdUnregisterCallback(int callbackID);
public interface SensorCallback extends Callback{
public void callbackfunction(Pointer protocol, Pointer model, int id, int dataType, Pointer value, int timestamp, int callbackId, Pointer context);
}
}
int callbackID;
CLibrary lib;
CLibrary.SensorCallback callback;
public SensorsJNACallback(){
lib = (CLibrary)Native.loadLibrary("libtelldus-core.so.2", CLibrary.class);
}
public void startListening(){
lib.tdInit();
//save reference to callback to avoid garbage collection
CLibrary.SensorCallback callback = new CLibrary.SensorCallback(){
public void callbackfunction(Pointer protocol, Pointer model, int id, int dataType, Pointer value, int timestamp, int callbackId, Pointer context){
System.out.println("Sensor: " + protocol.getString(0) + " " + model.getString(0));
long timestampvalue = (long)timestamp * 1000;
Date date = new Date(timestampvalue);
if(dataType == CLibrary.TELLSTICK_TEMPERATURE){
System.out.println("Temperature: " + value.getString(0) + "C, " + date.toString());
}
else if(dataType == CLibrary.TELLSTICK_HUMIDITY){
System.out.println("Humidity: " + value.getString(0) + "%, " + date.toString());
}
System.out.println("");
}
};
//register callback function for sensor events
callbackID = lib.tdRegisterSensorEvent(callback, (Pointer)null);
while(true){
try{
//just wait for sensor callbacks
Thread.currentThread().sleep(1000);
}
catch(InterruptedException e){
System.exit(0);
}
}
}
public void stopListening(){
System.out.println("Exiting");
lib.tdUnregisterCallback(callbackID);
callback = null;
lib.tdClose();
}
public static void main(String[] args)
{
final SensorsJNACallback sensorsjnacallback = new SensorsJNACallback();
//add shutdown hook to allow callback unregistration
Runtime.getRuntime().addShutdownHook(new Thread(){
public void run(){
sensorsjnacallback.stopListening();
Runtime.getRuntime().halt(0);
}
});
sensorsjnacallback.startListening();
}
}

60
examples/java/sensors/SensorsJNAPoll.java Normal file
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import java.io.*;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.ptr.*;
import java.util.Date;
public class SensorsJNAPoll
{
public interface CLibrary extends Library {
static int TELLSTICK_TEMPERATURE = 1;
static int TELLSTICK_HUMIDITY = 2;
void tdInit();
void tdClose();
int tdTurnOn(int deviceId);
int tdTurnOff(int deviceId);
int tdSensor(byte[] protocol, int protocolLength, byte[] model, int modelLength, IntByReference id,IntByReference dataTypes);
int tdSensorValue(byte[] protocol, byte[] model, int id, int dataType, byte[] value, int valueLength, IntByReference timestamp);
}
public static void main(String[] args)
{
CLibrary lib = (CLibrary)Native.loadLibrary("libtelldus-core.so.2", CLibrary.class);
lib.tdInit();
IntByReference id = new IntByReference();
IntByReference dataTypes = new IntByReference();
System.out.println("getting sensors");
System.out.println("");
byte protocol[] = new byte[20];
byte model[] = new byte[20];
//check every sensor
while(lib.tdSensor(protocol, 20, model, 20, id, dataTypes) == 0){
System.out.println("Sensor: " + Native.toString(protocol) + " " + Native.toString(model));
byte value[] = new byte[20];
IntByReference timestamp = new IntByReference();
if((dataTypes.getValue() & CLibrary.TELLSTICK_TEMPERATURE) != 0){
lib.tdSensorValue(protocol, model, id.getValue(), 1, value, 20, timestamp);
long timestampvalue = (long)timestamp.getValue() * 1000;
Date date = new Date(timestampvalue);
System.out.println("Temperature: " + Native.toString(value) + "C, " + date.toString());
}
if((dataTypes.getValue() & CLibrary.TELLSTICK_HUMIDITY) != 0){
lib.tdSensorValue(protocol, model, id.getValue(), 2, value, 20, timestamp);
long timestampvalue = (long)timestamp.getValue() * 1000;
Date date = new Date(timestampvalue);
System.out.println("Humidity: " + Native.toString(value) + "%, " + date.toString());
}
System.out.println("");
}
lib.tdClose();
}
}