1. SKKU Embedded Software Lab. 13 1 https://github.com/sensor-virtualization Remote Sensor Byunghei Jun Dongsu Kim Dongig Sin

2. SKKU Embedded Software Lab. 13 2 Motivation Tizen software supports the environment to use many sensor devices Odroid-u3 doesn’t have actual sensor hardware devices → We need to make an alternative way to support it

3. SKKU Embedded Software Lab. 13 3 Project Goal Implement remote-sensors by using sensors on mobile phone User-application doesn’t care about the remote-sensors –Framework supports all of the function for the remote-sensor

4. SKKU Embedded Software Lab. 13 4 Polling Based Architecture (Tizen 2.2)  Server (get sensor data from plugin) - Create worker thread for a client - Command handler: decode received command - Data stream layer: determine sensor plugin - Common plugin layer: implement for all the common functionality for the various sensor plugins  SensorManager (Sensor API) - Add and remove sensor listeners - Check available sensors - Get and set sensor information - Get sensor data  Plugin - get raw sensor data - filtering the data Tizen Sensor Architecture # Improved Event Driven Architecture for Tizen Sensor Framework, MOBILESoft’14, June 2–3, 2014, Hyderabad, India

5. SKKU Embedded Software Lab. 13 5 Implement Add new plugin with using existing sensor type Processor Sensor Remote GYRO Remote Driver (Bluetooth) If some sensor device doesn’t exist

6. SKKU Embedded Software Lab. 13 6 Remote-sensor Overall Modified Module ① Android Bluetooth Sender App ② Bluetooth Receiver ③ Virtual Sensor device ④ Sensor Plugin ⑤ Tizen Test App Tizen Odroid U3 Bluetooth Receiver Service Virtual Sensor Device Daemon (/dev/virtual_sensor) Sensor Framework Sensor App Sensor Plugin (sensor,processor) Bluetooth Sender App ① ② ③ ④ ⑤ Kernel

7. SKKU Embedded Software Lab. 13 7 Android Application Send the sensor data to Odroid-U3 through Bluetooth Bluetooth connection part Current sensor data (GYRO) Start to send e.g., “-0.445320 -0.17623 0.319171” √ Send a string including all of the data # https://github.com/sensor-virtualization/remote-sensor-android-client

8. SKKU Embedded Software Lab. 13 8 Bluetooth data receiver –Manage Bluetooth connection and data communication → Write the data received to virtual sensor device # https://github.com/sensor-virtualization/remote-sensor-framework-servicehttps://github.com/sensor-virtualization/remote-sensor-framework-service Virtual Sensor Device –Device daemon; managing read/write of sensor data –Write the data received from Bluetooth Data Receiver –The data is read by Sensor Plugin → Implement the part of adding device and callback function on Linux Module Program # https://github.com/sensor-virtualization/virtual_sensordevhttps://github.com/sensor-virtualization/virtual_sensordev Sensor Data Receiving

9. SKKU Embedded Software Lab. 13 9 Components of plugin –Sensor plugin : read data from Sensor Device –Processor Plugin : Interface with Sensor Framework –Filter plugin : convert raw data The data received is already converted, so we don’t care this part Implement Remote-GYRO plugin –The source code of existing sensors plugin is NOT provided (Only “.so” file) –Refer the plugin source code of emulator Path : platform/sdk/emulator-plugin-gyro-pkgs –Pass the transmitted data to sensor framework Path : /dev/virtual-sensor # https://github.com/sensor-virtualization/remote-gyro-plugin-pkgs Sensor Framework Plugin

10. SKKU Embedded Software Lab. 13 10 sf_sensor.conf –/usr/etc/sf_sensor.conf –Set sensor id, polling_interval, plugin file path, etc –Change plugin file path to make the new plugin available Sensor Plugin Configuration

11. SKKU Embedded Software Lab. 13 11 Tizen User Application Use existing API (SensorManager)

12. SKKU Embedded Software Lab. 13 12 Github # https://github.com/sensor-virtualization Remote-plugin(GYRO) Tizen Testing Application Virtual Sensor device Bluetooth Receiver Android Bluetooth Sender

13. SKKU Embedded Software Lab. 13 Demo http://www.youtube.com/watch?v=vya2PEhQoHU&feature=youtu.be