175 | * This method is called from the main thread when the services has been discovered and 176 | * the device is supported (has required service). 177 | *
178 | * Remember to call {@link Request#enqueue()} for each request. 179 | *
180 | * A sample initialization should look like this: 181 | *
182 | * @Override
183 | * protected void initialize() {
184 | * requestMtu(MTU)
185 | * .with((device, mtu) -> {
186 | * ...
187 | * })
188 | * .enqueue();
189 | * setNotificationCallback(characteristic)
190 | * .with((device, data) -> {
191 | * ...
192 | * });
193 | * enableNotifications(characteristic)
194 | * .done(device -> {
195 | * ...
196 | * })
197 | * .fail((device, status) -> {
198 | * ...
199 | * })
200 | * .enqueue();
201 | * }
202 | *
203 | */
204 | override fun initialize() {
205 | Timber.i("Initialising...")
206 |
207 | enableNotifications(espDisplayTimeCharacteristic)
208 | .done(SuccessCallback {
209 | Timber.i("Successfully enabled DisplayMessageCharacteristic notifications")
210 | })
211 | .fail { device, status ->
212 | Timber.w("Failed to enable DisplayMessageCharacteristic notifications")
213 | }.enqueue()
214 | enableIndications(espDisplayMessageCharacteristic)
215 | .done(SuccessCallback {
216 | Timber.i("Successfully wrote message")
217 | })
218 | .fail(FailCallback { device, status ->
219 | Timber.w("Failed to write message to ${device.address} - status: ${status}")
220 | })
221 | .enqueue()
222 |
223 | // requestMtu(MTU).enqueue()
224 | setNotificationCallback(espDisplayTimeCharacteristic)
225 | .with(DataReceivedCallback { device, data ->
226 | Timber.i("Data received from ${device.address}")
227 | })
228 | enableNotifications(espDisplayTimeCharacteristic)
229 | .done(SuccessCallback {
230 | Timber.i("Successfully enabled DisplayTimeCharacteristic notifications")
231 | })
232 | .fail { device, status ->
233 | Timber.w("Failed to enable DisplayTimeCharacteristic notifications")
234 | }.enqueue()
235 | enableIndications(espDisplayTimeCharacteristic)
236 | .done(SuccessCallback {
237 | Timber.i("Successfully wrote Time & Battery status")
238 | })
239 | .fail(FailCallback { device, status ->
240 | Timber.w("Failed to write Time & Battery status to ${device.address} - status: ${status}")
241 | }).enqueue()
242 |
243 | val batteryLevelPercent = Companion.readBatteryLevel(context)
244 | writeTimeAndBatteryLevel(batteryLevelPercent, ForegroundService.formatter.format(Date()))
245 | }
246 |
247 | /**
248 | * This method should nullify all services and characteristics of the device.
249 | * It's called when the device is no longer connected, either due to user action
250 | * or a link loss.
251 | */
252 | override fun onDeviceDisconnected() {
253 | espDisplayMessageCharacteristic = null
254 | espDisplayTimeCharacteristic = null
255 | espDisplayOrientationCharacteristic = null
256 | }
257 | }
258 | }
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/app/src/main/java/za/co/mitchwongho/example/esp32/alerts/ble/LeManagerCallbacks.kt:
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1 | package za.co.mitchwongho.example.esp32.alerts.ble
2 |
3 | import android.bluetooth.BluetoothDevice
4 | import no.nordicsemi.android.ble.BleManagerCallbacks
5 | import timber.log.Timber
6 |
7 | /**
8 | * Implements the BLEManager callback methods
9 | */
10 | open class LeManagerCallbacks : BleManagerCallbacks {
11 |
12 | /**
13 | * Called when the Android device started connecting to given device.
14 | * The [.onDeviceConnected] will be called when the device is connected,
15 | * or [.onError] in case of error.
16 | * @param device the device that got connected
17 | */
18 | override fun onDeviceConnecting(device: BluetoothDevice) {
19 | Timber.d("onDeviceConnecting {address=${device.address},name=${device.name}}")
20 | }
21 |
22 | /**
23 | * Called when the device has been connected. This does not mean that the application may start communication.
24 | * A service discovery will be handled automatically after this call. Service discovery
25 | * may ends up with calling [.onServicesDiscovered] or
26 | * [.onDeviceNotSupported] if required services have not been found.
27 | * @param device the device that got connected
28 | */
29 | override fun onDeviceConnected(device: BluetoothDevice) {
30 |
31 | Timber.d("onDeviceConnected {address=${device.address},name=${device.name}}")
32 | }
33 |
34 | /**
35 | * Called when user initialized disconnection.
36 | * @param device the device that gets disconnecting
37 | */
38 | override fun onDeviceDisconnecting(device: BluetoothDevice) {
39 | Timber.d("onDeviceDisconnecting {address=${device.address},name=${device.name}}")
40 | }
41 |
42 | /**
43 | * Called when the device has disconnected (when the callback returned
44 | * [BluetoothGattCallback.onConnectionStateChange] with state DISCONNECTED),
45 | * but ONLY if the [BleManager.shouldAutoConnect] method returned false for this device when it was connecting.
46 | * Otherwise the [.onLinklossOccur] method will be called instead.
47 | * @param device the device that got disconnected
48 | */
49 | override fun onDeviceDisconnected(device: BluetoothDevice) {
50 | Timber.d("onDeviceDisconnected {address=${device.address},name=${device.name}}")
51 | }
52 |
53 | /**
54 | * This callback is invoked when the Ble Manager lost connection to a device that has been connected
55 | * with autoConnect option (see [BleManager.shouldAutoConnect].
56 | * Otherwise a [.onDeviceDisconnected] method will be called on such event.
57 | * @param device the device that got disconnected due to a link loss
58 | */
59 | override fun onLinkLossOccurred(device: BluetoothDevice) {
60 | Timber.d("onLinklossOccur {address=${device.address},name=${device.name}}")
61 | }
62 |
63 | /**
64 | * Called when service discovery has finished and primary services has been found.
65 | * This method is not called if the primary, mandatory services were not found during service discovery.
66 | * For example in the Blood Pressure Monitor, a Blood Pressure service is a primary service and
67 | * Intermediate Cuff Pressure service is a optional secondary service.
68 | * Existence of battery service is not notified by this call.
69 | *
70 | * After successful service discovery the service will initialize all services.
71 | * The [.onDeviceReady] method will be called when the initialization is complete.
72 | *
73 | * @param device the device which services got disconnected
74 | * @param optionalServicesFound
75 | * if `true` the secondary services were also found on the device.
76 | */
77 | override fun onServicesDiscovered(device: BluetoothDevice, optionalServicesFound: Boolean) {
78 | Timber.d("onServiceDiscovered {address=${device.address},name=${device.name}}")
79 | }
80 |
81 | /**
82 | * Method called when all initialization requests has been completed.
83 | * @param device the device that get ready
84 | */
85 | override fun onDeviceReady(device: BluetoothDevice) {
86 | Timber.d("onDeviceReady {address=${device.address},name=${device.name}}")
87 | }
88 |
89 | /**
90 | * This method should return true if Battery Level notifications should be enabled on the target device.
91 | * If there is no Battery Service, or the Battery Level characteristic does not have NOTIFY property,
92 | * this method will not be called for this device.
93 | *
94 | * This method may return true only if an activity is bound to the service (to display the information
95 | * to the user), always (e.g. if critical battery level is reported using notifications) or never, if
96 | * such information is not important or the manager wants to control Battery Level notifications on its own.
97 | * @param device target device
98 | * @return true to enabled battery level notifications after connecting to the device, false otherwise
99 | */
100 | override fun shouldEnableBatteryLevelNotifications(device: BluetoothDevice): Boolean {
101 | // TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
102 | return false
103 | }
104 |
105 | /**
106 | * Called when battery value has been received from the device.
107 | *
108 | * @param value
109 | * the battery value in percent
110 | * @param device the device frm which the battery value has changed
111 | */
112 | override fun onBatteryValueReceived(device: BluetoothDevice, value: Int) {
113 | TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
114 | }
115 |
116 | /**
117 | * Called when an [BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION] error occurred and the device bond state is NOT_BONDED
118 | * @param device the device that requires bonding
119 | */
120 | override fun onBondingRequired(device: BluetoothDevice) {
121 | TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
122 | }
123 |
124 | /**
125 | * Called when the device has been successfully bonded.
126 | * @param device the device that got bonded
127 | */
128 | override fun onBonded(device: BluetoothDevice) {
129 | TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
130 | }
131 |
132 | override fun onBondingFailed(device: BluetoothDevice) {
133 | TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
134 | }
135 |
136 | /**
137 | * Called when a BLE error has occurred
138 | *
139 | * @param message
140 | * the error message
141 | * @param errorCode
142 | * the error code
143 | * @param device the device that caused an error
144 | */
145 | override fun onError(device: BluetoothDevice, message: String, errorCode: Int) {
146 | Timber.e("onError {address=${device.address},name=${device.name},msg=${message},err=$errorCode}")
147 | }
148 |
149 | /**
150 | * Called when service discovery has finished but the main services were not found on the device.
151 | * @param device the device that failed to connect due to lack of required services
152 | */
153 | override fun onDeviceNotSupported(device: BluetoothDevice) {
154 | Timber.d("onDeviceNotSupported {address=${device.address},name=${device.name}}")
155 | }
156 | }
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/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
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