Finding characteristic by UUID + required property

core/src/androidMain/kotlin/BluetoothDevice.kt

@@ -124,4 +124,4 @@ private val Phy.intValue: Int
     }
 
 private val BluetoothDevice.threadName: String
-    get() = "Gatt@$this"
+    get() = "Gatt@$this"

core/src/androidMain/kotlin/Peripheral.kt

@@ -7,10 +7,7 @@ import android.bluetooth.BluetoothAdapter.STATE_TURNING_OFF
 import android.bluetooth.BluetoothAdapter.STATE_TURNING_ON
 import android.bluetooth.BluetoothDevice
 import android.bluetooth.BluetoothGatt
-import android.bluetooth.BluetoothGattCharacteristic.PROPERTY_INDICATE
-import android.bluetooth.BluetoothGattCharacteristic.PROPERTY_NOTIFY
-import android.bluetooth.BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT
-import android.bluetooth.BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE
+import android.bluetooth.BluetoothGattCharacteristic.*
 import android.bluetooth.BluetoothGattDescriptor
 import android.bluetooth.BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE
 import android.bluetooth.BluetoothGattDescriptor.ENABLE_INDICATION_VALUE
@@ -264,7 +261,9 @@ public class AndroidPeripheral internal constructor(
         data: ByteArray,
         writeType: WriteType,
     ) {
-        val bluetoothGattCharacteristic = bluetoothGattCharacteristicFrom(characteristic)
+        val bluetoothGattCharacteristic = bluetoothGattCharacteristicFrom(
+            characteristic,
+            PROPERTY_WRITE or PROPERTY_WRITE_NO_RESPONSE)
         connection.execute<OnCharacteristicWrite> {
             bluetoothGattCharacteristic.value = data
             bluetoothGattCharacteristic.writeType = writeType.intValue
@@ -313,7 +312,9 @@ public class AndroidPeripheral internal constructor(
     ): Flow<ByteArray> = observers.acquire(characteristic, onSubscription)
 
     internal suspend fun startObservation(characteristic: Characteristic) {
-        val platformCharacteristic = platformServices.findCharacteristic(characteristic)
+        val platformCharacteristic = platformServices.findCharacteristic(
+            characteristic,
+            PROPERTY_NOTIFY or PROPERTY_INDICATE)
         connection
             .bluetoothGatt
             .setCharacteristicNotification(platformCharacteristic, true)
@@ -356,8 +357,8 @@ public class AndroidPeripheral internal constructor(
     }
 
     private fun bluetoothGattCharacteristicFrom(
-        characteristic: Characteristic
-    ) = platformServices.findCharacteristic(characteristic).bluetoothGattCharacteristic
+        characteristic: Characteristic, propertyMask: Int = -1
+    ) = platformServices.findCharacteristic(characteristic, propertyMask).bluetoothGattCharacteristic
 
     private fun bluetoothGattDescriptorFrom(
         descriptor: Descriptor

core/src/androidMain/kotlin/PlatformService.kt

@@ -29,21 +29,25 @@ internal fun BluetoothGattService.toPlatformService(): PlatformService {
 
 /** @throws NoSuchElementException if service or characteristic is not found. */
 internal fun List<PlatformService>.findCharacteristic(
-    characteristic: Characteristic
+    characteristic: Characteristic, propertyMask: Int = -1
 ): PlatformCharacteristic =
     findCharacteristic(
         serviceUuid = characteristic.serviceUuid,
-        characteristicUuid = characteristic.characteristicUuid
+        characteristicUuid = characteristic.characteristicUuid,
+        propertyMask = propertyMask
     )
 
-/** @throws NoSuchElementException if service or characteristic is not found. */
 private fun List<PlatformService>.findCharacteristic(
     serviceUuid: Uuid,
-    characteristicUuid: Uuid
+    characteristicUuid: Uuid,
+    propertyMask: Int = -1
 ): PlatformCharacteristic =
     first(serviceUuid)
         .characteristics
-        .first(characteristicUuid)
+        .first { platformCharacteristic ->
+            platformCharacteristic.characteristicUuid == characteristicUuid
+                    && platformCharacteristic.bluetoothGattCharacteristic.properties and propertyMask != 0
+        }
 
 /** @throws NoSuchElementException if service, characteristic or descriptor is not found. */
 internal fun List<PlatformService>.findDescriptor(
@@ -63,5 +67,5 @@ private fun List<PlatformService>.findDescriptor(
 ): PlatformDescriptor =
     findCharacteristic(
         serviceUuid = serviceUuid,
-        characteristicUuid = characteristicUuid
+        characteristicUuid = characteristicUuid,
     ).descriptors.first(descriptorUuid)

gradle.properties

@@ -14,18 +14,15 @@ POM_NAME=Kable
 POM_DESCRIPTION=Kotlin Asynchronous Bluetooth Low Energy
 POM_INCEPTION_YEAR=2020
 
-POM_URL=https://github.com/JuulLabs/kable
-POM_SCM_URL=https://github.com/JuulLabs/kable
-POM_SCM_CONNECTION=scm:git:git://github.com/JuulLabs/kable.git
-POM_SCM_DEV_CONNECTION=scm:git:ssh://git@github.com/JuulLabs/kable.git
+POM_URL=https://github.com/solvek/kable
+POM_SCM_URL=https://github.com/solvek/kable
+POM_SCM_CONNECTION=scm:git:git://github.com/solvek/kable.git
+POM_SCM_DEV_CONNECTION=scm:git:ssh://git@github.com/solvek/kable.git
 
 POM_LICENCE_NAME=The Apache Software License, Version 2.0
 POM_LICENCE_URL=https://www.apache.org/licenses/LICENSE-2.0.txt
 POM_LICENCE_DIST=repo
 
-POM_DEVELOPER_ID=twyatt
-POM_DEVELOPER_NAME=Travis Wyatt
-POM_DEVELOPER_URL=https://github.com/twyatt
-
-kotlin.js.webpack.major.version=5
-kotlin.js.compiler=both
+POM_DEVELOPER_ID=solvek
+POM_DEVELOPER_NAME=Sergi Adamchuk
+POM_DEVELOPER_URL=https://github.com/solvek