Android Things Workshop - Building a Motion Sensing Camera

In this workshop, attendees built an Android Things motion sensing camera using the Google Android Things libraries. The slides acted as a guide throughout the workshop.
The full hackster project can be found here - https://www.hackster.io/riggaroo/smart-motion-sensing-camera-with-intruder-notifications-b6c613
With the Github Repository for the workshop with the different steps: https://github.com/riggaroo/android-things-workshop-camera

Transcript

6. extension IoT embedded
7. powerful intelligent secure
8. Android SDK Play Services Firebase Android Studio Cloud Platform
9. No Play Store Deploy OTAs Subset of APIs Custom Hardware Single Purpose Device
13. SoM Architecture Google Managed BSP
14. Android Framework Hardware Libraries Linux Kernel Apps User Drivers
15. • • • •
21. Button GPS PWM Servo RGB LED Strip Temperature Sensor Capacitive Touch Buttons GPIO PWM I2C SPI UART I2S
28. Electronics Basics
29. Components Breadboard - Construction base for prototyping electronics Jumper Wire - Used to interconnect the components of a breadboard
30. LEDs - Emits visible light when an electric current passes through it Push Switches - Allows electricity to flow between its two contacts Components
31. Resistor -Used to reduce current flow Source: http://www.electronicshub.org/resistor-color-code/ Components and many more...
32. Ohm’s Law The current through a conductor between two points is directly proportional to the voltage across the two points. V = I * R V is Voltage (volts) I is Current (amps) R is Resistance (ohms) I = 0.023A V = 5V R = 5V / 0.023A R = ± 217 ohms
35. Red, Red, Brown = 220 ohm Brown, Black, Orange = 1k ohm
41. Pico Setup: bit.ly/pico-pro-setup
43. //Boot into fastboot mode $ adb reboot bootloader // Get list of fastboot devices $ fastboot devices 1b2f21d4e1fe0129 fastboot //Locate directory with factory image $ ./flash_all.sh //windows ./flash_all.bat // Get list of devices once flashed $ adb devices List of devices attached 1b2f21d4e1fe0129 device
44. //Start internet $ adb shell am startservice -n com.google.wifisetup/.WifiSetupService -a WifiSetupService.Connect -e ssid "Jozihub Events" -e passphrase Jozihub#
50. //Automatically added in app level build.gradle compileOnly 'com.google.android.things:androidthings:...'
51. //Automatically added in AndroidManifest.xml <application ...> <uses-library android:name="com.google.android.things"/> <activity ...> <!-- Launch activity automatically on boot --> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.IOT_LAUNCHER"/> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> </activity> </application>
52. //Automatically added in AndroidManifest.xml <application ...> <uses-library android:name="com.google.android.things"/> <activity ...> <!-- Launch activity automatically on boot --> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.IOT_LAUNCHER"/> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> </activity> </application>
54. //Accessing Sensor Data private val buttonGpio: Gpio = PeripheralManagerService().openGpio(“GPIO_175”) fun start() { buttonGpio.setDirection(Gpio.DIRECTION_IN) buttonGpio.setActiveType(Gpio.ACTIVE_HIGH) buttonGpio.setEdgeTriggerType(Gpio.EDGE_BOTH) buttonGpio.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio): Boolean { if (gpio.value) { ledGpio.value = true } else { //do something else } return true } }) }
55. //Accessing Sensor Data private val buttonGpio: Gpio = PeripheralManagerService().openGpio(“GPIO_175”) fun start() { buttonGpio.setDirection(Gpio.DIRECTION_IN) buttonGpio.setActiveType(Gpio.ACTIVE_HIGH) buttonGpio.setEdgeTriggerType(Gpio.EDGE_BOTH) buttonGpio.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio): Boolean { if (gpio.value) { ledGpio.value = true } else { //do something else } return true } }) }
56. //Accessing Sensor Data private val buttonGpio: Gpio = PeripheralManagerService().openGpio(“GPIO_175”) fun start() { buttonGpio.setDirection(Gpio.DIRECTION_IN) buttonGpio.setActiveType(Gpio.ACTIVE_HIGH) buttonGpio.setEdgeTriggerType(Gpio.EDGE_BOTH) buttonGpio.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio): Boolean { if (gpio.value) { ledGpio.value = true } else { //do something else } return true } }) }
58. //Accessing Sensor Data private val motionSensorGpio: Gpio = PeripheralManagerService().openGpio(“GPIO_35”) fun start() { motionSensorGpio.setDirection(Gpio.DIRECTION_IN) motionSensorGpio.setActiveType(Gpio.ACTIVE_HIGH) motionSensorGpio.setEdgeTriggerType(Gpio.EDGE_BOTH) motionSensorGpio.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio): Boolean { if (gpio.value) { motionListener.onMotionDetected() } else { motionListener.onMotionStopped() } return true } }) }
59. //Accessing Sensor Data private val motionSensorGpio: Gpio = PeripheralManagerService().openGpio(“GPIO_35”) fun start() { motionSensorGpio.setDirection(Gpio.DIRECTION_IN) motionSensorGpio.setActiveType(Gpio.ACTIVE_HIGH) motionSensorGpio.setEdgeTriggerType(Gpio.EDGE_BOTH) motionSensorGpio.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio): Boolean { if (gpio.value) { motionListener.onMotionDetected() } else { motionListener.onMotionStopped() } return true } }) }
60. //Accessing Sensor Data private val motionSensorGpio: Gpio = PeripheralManagerService().openGpio(“GPIO_35”) fun start() { motionSensorGpio.setDirection(Gpio.DIRECTION_IN) motionSensorGpio.setActiveType(Gpio.ACTIVE_HIGH) motionSensorGpio.setEdgeTriggerType(Gpio.EDGE_BOTH) motionSensorGpio.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio): Boolean { if (gpio.value) { camera.takePhoto() } else { //do something else } return true } }) }
62. val peripheralManagerService = PeripheralManagerService() ledGpio = peripheralManagerService.openGpio(“GPIO_174”) ledGpio.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW) ledGpio.value = true ledGpio.close()
63. val peripheralManagerService = PeripheralManagerService() ledGpio = peripheralManagerService.openGpio(“GPIO_174”) ledGpio.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW) ledGpio.value = true ledGpio.close()
64. val peripheralManagerService = PeripheralManagerService() ledGpio = peripheralManagerService.openGpio(“GPIO_174”) ledGpio.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW) ledGpio.value = true ledGpio.close()
67. private fun setupCamera() { camera = CustomCamera.getInstance() camera.initializeCamera(this, Handler(), imageAvailableListener) } private val imageAvailableListener = object : CustomCamera.ImageCapturedListener { override fun onImageCaptured(bitmap: Bitmap) { motionImageView.setImageBitmap(bitmap) motionViewModel.uploadMotionImage(bitmap) } } camera.takePicture()
68. private fun setupCamera() { camera = CustomCamera.getInstance() camera.initializeCamera(this, Handler(), imageAvailableListener) } private val imageAvailableListener = object : CustomCamera.ImageCapturedListener { override fun onImageCaptured(bitmap: Bitmap) { motionImageView.setImageBitmap(bitmap) motionViewModel.uploadMotionImage(bitmap) } } camera.takePicture()
69. private fun setupCamera() { camera = CustomCamera.getInstance() camera.initializeCamera(this, Handler(), imageAvailableListener) } private val imageAvailableListener = object : CustomCamera.ImageCapturedListener { override fun onImageCaptured(bitmap: Bitmap) { motionImageView.setImageBitmap(bitmap) motionViewModel.uploadMotionImage(bitmap) } } camera.takePicture()
73. //data class for saving data class FirebaseImageLog(val timestamp: Long? = null, val imageRef: String? = null) //upload image val storageRef = FirebaseStorage.getInstance().getReference(FIREBASE_MOTION_REF) val imageStorageRef = storageRef.child(FIREBASE_IMAGE_PREFIX + System.currentTimeMillis() + ".jpg") val uploadTask = imageStorageRef.putBytes(imageStream.toByteArray()) uploadTask.addOnFailureListener { Log.d(TAG, "onFailure uploadMotionImage") }.addOnSuccessListener { // save image log to realtime db val downloadUrl = imageStorageRef.path val ref = FirebaseDatabase.getInstance().getReference(FIREBASE_MOTION_LOGS).push() ref.setValue(FirebaseImageLog(System.currentTimeMillis(), downloadUrl)) }
74. //data class for saving data class FirebaseImageLog(val timestamp: Long? = null, val imageRef: String? = null) //upload image val storageRef = FirebaseStorage.getInstance().getReference(FIREBASE_MOTION_REF) val imageStorageRef = storageRef.child(FIREBASE_IMAGE_PREFIX + System.currentTimeMillis() + ".jpg") val uploadTask = imageStorageRef.putBytes(imageStream.toByteArray()) uploadTask.addOnFailureListener { Log.d(TAG, "onFailure uploadMotionImage") }.addOnSuccessListener { // save image log to realtime db val downloadUrl = imageStorageRef.path val ref = FirebaseDatabase.getInstance().getReference(FIREBASE_MOTION_LOGS).push() ref.setValue(FirebaseImageLog(System.currentTimeMillis(), downloadUrl)) }
75. //data class for saving data class FirebaseImageLog(val timestamp: Long? = null, val imageRef: String? = null) //upload image val storageRef = FirebaseStorage.getInstance().getReference(FIREBASE_MOTION_REF) val imageStorageRef = storageRef.child(FIREBASE_IMAGE_PREFIX + System.currentTimeMillis() + ".jpg") val uploadTask = imageStorageRef.putBytes(imageStream.toByteArray()) uploadTask.addOnFailureListener { Log.d(TAG, "onFailure uploadMotionImage") }.addOnSuccessListener { // save image log to realtime db val downloadUrl = imageStorageRef.path val ref = FirebaseDatabase.getInstance().getReference(FIREBASE_MOTION_LOGS).push() ref.setValue(FirebaseImageLog(System.currentTimeMillis(), downloadUrl)) }
76. //data class for saving data class FirebaseImageLog(val timestamp: Long? = null, val imageRef: String? = null) //upload image val storageRef = FirebaseStorage.getInstance().getReference(FIREBASE_MOTION_REF) val imageStorageRef = storageRef.child(FIREBASE_IMAGE_PREFIX + System.currentTimeMillis() + ".jpg") val uploadTask = imageStorageRef.putBytes(imageStream.toByteArray()) uploadTask.addOnFailureListener { Log.d(TAG, "onFailure uploadMotionImage") }.addOnSuccessListener { // save image log to realtime db val downloadUrl = imageStorageRef.path val ref = FirebaseDatabase.getInstance().getReference(FIREBASE_MOTION_LOGS).push() ref.setValue(FirebaseImageLog(System.currentTimeMillis(), downloadUrl)) }
79. $ firebase login $ firebase init functions
80. var functions = require('firebase-functions'); var admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase); exports.annotateImage = functions.database.ref('/motion-logs/{id}') .onCreate(event => { const original = event.data.val(); var topic = "/topics/intruders"; var payload = { data: { title: "Intruder Alert!", body: "An intruder has been detected" } }; return admin.messaging().sendToTopic(topic, payload) .then(function (response) { console.log("Successfully sent message:", response); }).catch(function (error) { console.log("Error sending message:", error); }); } );
81. var functions = require('firebase-functions'); var admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase); exports.annotateImage = functions.database.ref('/motion-logs/{id}') .onCreate(event => { const original = event.data.val(); var topic = "/topics/intruders"; var payload = { data: { title: "Intruder Alert!", body: "An intruder has been detected" } }; return admin.messaging().sendToTopic(topic, payload) .then(function (response) { console.log("Successfully sent message:", response); }).catch(function (error) { console.log("Error sending message:", error); }); } );
82. var functions = require('firebase-functions'); var admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase); exports.annotateImage = functions.database.ref('/motion-logs/{id}') .onCreate(event => { const original = event.data.val(); var topic = "/topics/intruders"; var payload = { data: { title: "Intruder Alert!", body: "An intruder has been detected" } }; return admin.messaging().sendToTopic(topic, payload) .then(function (response) { console.log("Successfully sent message:", response); }).catch(function (error) { console.log("Error sending message:", error); }); } );
83. $ firebase deploy --only functions
86. //Use FirebaseUI dependency api "com.firebaseui:firebase-ui-database:3.0.0" // Get DB Reference val databaseRef = FirebaseDatabase.getInstance().getReference(MOTION_LOGS_FIREBASE_REF) // Create adapter that extends FirebaseRecyclerAdapter class LogsAdapter(ref: DatabaseReference) : FirebaseRecyclerAdapter<FirebaseImageLog, LogsViewHolder>(FirebaseImageLog::class.java, R.layout.list_item_log, LogsViewHolder::class.java, ref) { //.. Do adapter things } // Set adapter to use reference adapter = LogsAdapter(databaseRef.orderByChild(ORDER_BY_TIMESTAMP).ref)
87. //Use FirebaseUI dependency api "com.firebaseui:firebase-ui-database:3.0.0" // Get DB Reference val databaseRef = FirebaseDatabase.getInstance().getReference(MOTION_LOGS_FIREBASE_REF) // Create adapter that extends FirebaseRecyclerAdapter class LogsAdapter(ref: DatabaseReference) : FirebaseRecyclerAdapter<FirebaseImageLog, LogsViewHolder>(FirebaseImageLog::class.java, R.layout.list_item_log, LogsViewHolder::class.java, ref) { //.. Do adapter things } // Set adapter to use reference adapter = LogsAdapter(databaseRef.orderByChild(ORDER_BY_TIMESTAMP).ref)
88. //Use FirebaseUI dependency api "com.firebaseui:firebase-ui-database:3.0.0" // Get DB Reference val databaseRef = FirebaseDatabase.getInstance().getReference(MOTION_LOGS_FIREBASE_REF) // Create adapter that extends FirebaseRecyclerAdapter class LogsAdapter(ref: DatabaseReference) : FirebaseRecyclerAdapter<FirebaseImageLog, LogsViewHolder>(FirebaseImageLog::class.java, R.layout.list_item_log, LogsViewHolder::class.java, ref) { //.. Do adapter things } // Set adapter to use reference adapter = LogsAdapter(databaseRef.orderByChild(ORDER_BY_TIMESTAMP).ref)
89. //Use FirebaseUI dependency api "com.firebaseui:firebase-ui-database:3.0.0" // Get DB Reference val databaseRef = FirebaseDatabase.getInstance().getReference(MOTION_LOGS_FIREBASE_REF) // Create adapter that extends FirebaseRecyclerAdapter class LogsAdapter(ref: DatabaseReference) : FirebaseRecyclerAdapter<FirebaseImageLog, LogsViewHolder>(FirebaseImageLog::class.java, R.layout.list_item_log, LogsViewHolder::class.java, ref) { //.. Do adapter things } // Set adapter to use reference adapter = LogsAdapter(databaseRef.orderByChild(ORDER_BY_TIMESTAMP).ref)
94. Clear all Android Apps on device: https://gist.github.com/blundell/7c0c3bb17898b28fe8122b0dc230af50 Button Example : https://github.com/androidthings/sample-button Full MainActivity: https://gist.github.com/riggaroo/b4cad83be2f81d54fd854403af029b2d Github Project with Steps as branches: https://github.com/riggaroo/android-things-workshop-camera