Error when connecting to a QN-Scale

[ExTxMarine]

Build version: 2.5.2-pro
Build date: 1981-01-01 01:01:02
Current date: 2024-11-23 10:28:52
Device: Samsung SM-G781U
OS version: Android 13 (SDK 33)

Stack trace:
java.lang.NullPointerException: no valid characteristic provided
at j$.util.Objects.requireNonNull(Unknown Source:5)
at com.welie.blessed.BluetoothPeripheral.writeCharacteristic(BluetoothPeripheral.java:1229)
at com.health.openscale.core.bluetooth.BluetoothCommunication.writeBytes(BluetoothCommunication.java:303)
at com.health.openscale.core.bluetooth.BluetoothCommunication.writeBytes(BluetoothCommunication.java:291)
at com.health.openscale.core.bluetooth.BluetoothQNScale.onNextStep(BluetoothQNScale.java:111)
at com.health.openscale.core.bluetooth.BluetoothCommunication.nextMachineStep(BluetoothCommunication.java:610)
at com.health.openscale.core.bluetooth.BluetoothCommunication.nextMachineStep(BluetoothCommunication.java:612)
at com.health.openscale.core.bluetooth.BluetoothCommunication.nextMachineStep(BluetoothCommunication.java:612)
at com.health.openscale.core.bluetooth.BluetoothCommunication.resumeMachineState(BluetoothCommunication.java:210)
at com.health.openscale.core.bluetooth.BluetoothCommunication$1.onServicesDiscovered(BluetoothCommunication.java:464)
at com.welie.blessed.BluetoothPeripheral$1$1.run(BluetoothPeripheral.java:210)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8762)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:604)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)

[0ut1awStar]

Having similar issue with a Renpho ES-CS20M Scale (QN-Scale):

Build version: 2.5.3
Build date: 1981-01-01 01:01:02
Current date: 2025-01-15 11:20:37
Device: Motorola moto g stylus 5G - 2023
OS version: Android 14 (SDK 34)

Stack trace:
java.lang.NullPointerException: no valid characteristic provided
at j$.util.Objects.requireNonNull(Unknown Source:5)
at com.welie.blessed.BluetoothPeripheral.writeCharacteristic(BluetoothPeripheral.java:1224)
at com.health.openscale.core.bluetooth.BluetoothCommunication.writeBytes(BluetoothCommunication.java:303)
at com.health.openscale.core.bluetooth.BluetoothCommunication.writeBytes(BluetoothCommunication.java:291)
at com.health.openscale.core.bluetooth.BluetoothQNScale.onNextStep(BluetoothQNScale.java:111)
at com.health.openscale.core.bluetooth.BluetoothCommunication.nextMachineStep(BluetoothCommunication.java:610)
at com.health.openscale.core.bluetooth.BluetoothCommunication.nextMachineStep(BluetoothCommunication.java:612)
at com.health.openscale.core.bluetooth.BluetoothCommunication.nextMachineStep(BluetoothCommunication.java:612)
at com.health.openscale.core.bluetooth.BluetoothCommunication.resumeMachineState(BluetoothCommunication.java:210)
at com.health.openscale.core.bluetooth.BluetoothCommunication$1.onServicesDiscovered(BluetoothCommunication.java:464)
at com.welie.blessed.BluetoothPeripheral$1$1.run(BluetoothPeripheral.java:213)
at android.os.Handler.handleCallback(Handler.java:1000)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loopOnce(Looper.java:242)
at android.os.Looper.loop(Looper.java:362)
at android.app.ActivityThread.main(ActivityThread.java:8448)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:992)