diff --git a/include/gui/ISensorServer.h b/include/gui/ISensorServer.h
index 3e05076..9c8afc5 100644
--- a/include/gui/ISensorServer.h
+++ b/include/gui/ISensorServer.h
@@ -36,7 +36,7 @@
 public:
     DECLARE_META_INTERFACE(SensorServer);
 
-    virtual Vector<Sensor> getSensorList()= 0;
+    virtual Vector<Sensor> getSensorList() = 0;
     virtual sp<ISensorEventConnection> createSensorEventConnection() = 0;
 };
 
diff --git a/include/gui/Sensor.h b/include/gui/Sensor.h
index 86a16f1..e696d63 100644
--- a/include/gui/Sensor.h
+++ b/include/gui/Sensor.h
@@ -51,7 +51,8 @@
         TYPE_PROXIMITY      = ASENSOR_TYPE_PROXIMITY
     };
 
-    Sensor();
+            Sensor();
+            Sensor(struct sensor_t const* hwSensor);
     virtual ~Sensor();
 
     const String8& getName() const;
diff --git a/include/gui/SensorEventQueue.h b/include/gui/SensorEventQueue.h
index d8d8128..bb03c12 100644
--- a/include/gui/SensorEventQueue.h
+++ b/include/gui/SensorEventQueue.h
@@ -42,6 +42,7 @@
 
 class ISensorEventConnection;
 class Sensor;
+class PollLoop;
 
 // ----------------------------------------------------------------------------
 
@@ -56,13 +57,21 @@
     ssize_t write(ASensorEvent const* events, size_t numEvents);
     ssize_t read(ASensorEvent* events, size_t numEvents);
 
+    status_t waitForEvent() const;
+    status_t wake() const;
+
     status_t enableSensor(Sensor const* sensor) const;
     status_t disableSensor(Sensor const* sensor) const;
+    status_t enableSensor(int32_t handle) const;
+    status_t disableSensor(int32_t handle) const;
     status_t setEventRate(Sensor const* sensor, nsecs_t ns) const;
 
 private:
+    sp<PollLoop> getPollLoop() const;
     sp<ISensorEventConnection> mSensorEventConnection;
     sp<SensorChannel> mSensorChannel;
+    mutable Mutex mLock;
+    mutable sp<PollLoop> mPollLoop;
 };
 
 // ----------------------------------------------------------------------------
diff --git a/include/gui/SensorManager.h b/include/gui/SensorManager.h
index 0d65334..e1b1a7b 100644
--- a/include/gui/SensorManager.h
+++ b/include/gui/SensorManager.h
@@ -47,13 +47,13 @@
     SensorManager();
     ~SensorManager();
 
-    ssize_t getSensorList(Sensor**) const;
-    Sensor* getDefaultSensor(int type);
+    ssize_t getSensorList(Sensor const* const** list) const;
+    Sensor const* getDefaultSensor(int type);
     sp<SensorEventQueue> createEventQueue();
 
 private:
     sp<ISensorServer> mSensorServer;
-    Sensor* mSensorList;
+    Sensor const** mSensorList;
     Vector<Sensor> mSensors;
 };
 
diff --git a/libs/gui/ISensorEventConnection.cpp b/libs/gui/ISensorEventConnection.cpp
index 3e9d456..a5083fe 100644
--- a/libs/gui/ISensorEventConnection.cpp
+++ b/libs/gui/ISensorEventConnection.cpp
@@ -47,6 +47,7 @@
     virtual sp<SensorChannel> getSensorChannel() const
     {
         Parcel data, reply;
+        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
         remote()->transact(GET_SENSOR_CHANNEL, data, &reply);
         return new SensorChannel(reply);
     }
@@ -54,6 +55,7 @@
     virtual status_t enableDisable(int handle, bool enabled)
     {
         Parcel data, reply;
+        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
         data.writeInt32(handle);
         data.writeInt32(enabled);
         remote()->transact(ENABLE_DISABLE, data, &reply);
@@ -63,6 +65,7 @@
     virtual status_t setEventRate(int handle, nsecs_t ns)
     {
         Parcel data, reply;
+        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
         data.writeInt32(handle);
         data.writeInt64(ns);
         remote()->transact(SET_EVENT_RATE, data, &reply);
diff --git a/libs/gui/ISensorServer.cpp b/libs/gui/ISensorServer.cpp
index c6177bc..7111092 100644
--- a/libs/gui/ISensorServer.cpp
+++ b/libs/gui/ISensorServer.cpp
@@ -48,6 +48,7 @@
     virtual Vector<Sensor> getSensorList()
     {
         Parcel data, reply;
+        data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());
         remote()->transact(GET_SENSOR_LIST, data, &reply);
         Sensor s;
         Vector<Sensor> v;
@@ -63,6 +64,7 @@
     virtual sp<ISensorEventConnection> createSensorEventConnection()
     {
         Parcel data, reply;
+        data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());
         remote()->transact(CREATE_SENSOR_EVENT_CONNECTION, data, &reply);
         return interface_cast<ISensorEventConnection>(reply.readStrongBinder());
     }
diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp
index 1fdd285..48e1cb7 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/gui/Sensor.cpp
@@ -36,6 +36,18 @@
 {
 }
 
+Sensor::Sensor(struct sensor_t const* hwSensor)
+{
+    mName = hwSensor->name;
+    mVendor = hwSensor->vendor;
+    mHandle = hwSensor->handle;
+    mType = hwSensor->type;
+    mMinValue = 0;                      // FIXME: minValue
+    mMaxValue = hwSensor->maxRange;     // FIXME: maxValue
+    mResolution = hwSensor->resolution;
+    mPower = hwSensor->power;
+}
+
 Sensor::~Sensor()
 {
 }
diff --git a/libs/gui/SensorEventQueue.cpp b/libs/gui/SensorEventQueue.cpp
index f922ac4..cc98656 100644
--- a/libs/gui/SensorEventQueue.cpp
+++ b/libs/gui/SensorEventQueue.cpp
@@ -13,11 +13,15 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+#define LOG_TAG "Sensors"
+
 #include <stdint.h>
 #include <sys/types.h>
 
 #include <utils/Errors.h>
 #include <utils/RefBase.h>
+#include <utils/PollLoop.h>
 
 #include <gui/Sensor.h>
 #include <gui/SensorChannel.h>
@@ -68,7 +72,7 @@
     ssize_t size = mSensorChannel->read(events, numEvents*sizeof(events[0]));
     if (size >= 0) {
         if (size % sizeof(events[0])) {
-            // partial write!!! should never happen.
+            // partial read!!! should never happen.
             return -EINVAL;
         }
         // returns number of events read
@@ -77,18 +81,48 @@
     return size;
 }
 
-status_t SensorEventQueue::enableSensor(Sensor const* sensor) const
+sp<PollLoop> SensorEventQueue::getPollLoop() const
 {
+    Mutex::Autolock _l(mLock);
+    if (mPollLoop == 0) {
+        mPollLoop = new PollLoop(true);
+        mPollLoop->setCallback(getFd(), POLLIN, NULL, NULL);
+    }
+    return mPollLoop;
+}
+
+status_t SensorEventQueue::waitForEvent() const
+{
+    const int fd = getFd();
+    sp<PollLoop> pollLoop(getPollLoop());
+    int32_t result = pollLoop->pollOnce(-1, NULL, NULL);
+    return (result == fd) ? NO_ERROR : -1;
+}
+
+status_t SensorEventQueue::wake() const
+{
+    sp<PollLoop> pollLoop(getPollLoop());
+    pollLoop->wake();
+    return NO_ERROR;
+}
+
+status_t SensorEventQueue::enableSensor(Sensor const* sensor) const {
     return mSensorEventConnection->enableDisable(sensor->getHandle(), true);
 }
 
-status_t SensorEventQueue::disableSensor(Sensor const* sensor) const
-{
+status_t SensorEventQueue::disableSensor(Sensor const* sensor) const {
     return mSensorEventConnection->enableDisable(sensor->getHandle(), false);
 }
 
-status_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const
-{
+status_t SensorEventQueue::enableSensor(int32_t handle) const {
+    return mSensorEventConnection->enableDisable(handle, true);
+}
+
+status_t SensorEventQueue::disableSensor(int32_t handle) const {
+    return mSensorEventConnection->enableDisable(handle, false);
+}
+
+status_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const {
     return mSensorEventConnection->setEventRate(sensor->getHandle(), ns);
 }
 
diff --git a/libs/gui/SensorManager.cpp b/libs/gui/SensorManager.cpp
index cd89285..d719efb 100644
--- a/libs/gui/SensorManager.cpp
+++ b/libs/gui/SensorManager.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#define LOG_TAG "Sensors"
+
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -21,6 +23,8 @@
 #include <utils/RefBase.h>
 #include <utils/Singleton.h>
 
+#include <binder/IServiceManager.h>
+
 #include <gui/ISensorServer.h>
 #include <gui/ISensorEventConnection.h>
 #include <gui/Sensor.h>
@@ -36,25 +40,40 @@
 SensorManager::SensorManager()
     : mSensorList(0)
 {
+    const String16 name("sensorservice");
+    while (getService(name, &mSensorServer) != NO_ERROR) {
+        usleep(250000);
+    }
+
     mSensors = mSensorServer->getSensorList();
-    // TODO: needs implementation
+    size_t count = mSensors.size();
+    mSensorList = (Sensor const**)malloc(count * sizeof(Sensor*));
+    for (size_t i=0 ; i<count ; i++) {
+        mSensorList[i] = mSensors.array() + i;
+    }
 }
 
 SensorManager::~SensorManager()
 {
-    // TODO: needs implementation
+    free(mSensorList);
 }
 
-ssize_t SensorManager::getSensorList(Sensor** list) const
+ssize_t SensorManager::getSensorList(Sensor const* const** list) const
 {
     *list = mSensorList;
     return mSensors.size();
 }
 
-Sensor* SensorManager::getDefaultSensor(int type)
+Sensor const* SensorManager::getDefaultSensor(int type)
 {
-    // TODO: needs implementation
-    return mSensorList;
+    // For now we just return the first sensor of that type we find.
+    // in the future it will make sense to let the SensorService make
+    // that decision.
+    for (size_t i=0 ; i<mSensors.size() ; i++) {
+        if (mSensorList[i]->getType() == type)
+            return mSensorList[i];
+    }
+    return NULL;
 }
 
 sp<SensorEventQueue> SensorManager::createEventQueue()