bluetooth-lowenergy

问题 Context: I have two devices with me: 1. LG G7 2. Huawei Pra LX1 I am currently using implementation "com.polidea.rxandroidble2:rxandroidble:1.10.0" When I call to Disposable scanSubscription = rxBleClient.scanBleDevices( new ScanSettings.Builder() // .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY) // change if needed // .setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES) // change if needed .build() // add filters if needed ) .subscribe( scanResult -> { // Process scan result here. },

问题 I created a simple app in python3 using Kivy for the UI and bluepy to access some Bluetooth BLE devices. Now I like to port the app to my Android phone. I saw there is somehow a port in Kivy to Android (https://github.com/kivy/python-for-android). But I am not sure if I can port my app with the bluepy dependency. So it comes down to the questions: 1st) is it possible to port a kivy and bluepy app to Android? 2nd) is there a tutorial showing how to do that? 回答1: You can package an Android app

问题 Does anyone have experience using the Nordic NRF52840 with a C# app to act as a receiver? I'm trying to communicate with an Onset InTemp thermometer and although I've had quite a bit of success with the native Windows 10 BLE, I'm having some problems. See: C#, BLE. Why does GetGattServicesAsync hang forever? Is there a work around such as turning off/on BLE? for details. Nordic advertises that they only have C++, Python and Node.js libraries. See https://devzone.nordicsemi.com/f/nordic-q-a

问题 I'm undertaking a new project involving flutter and bluetooth. For this I read a bit about it and tried a test project, but I still have questions I find no easy answer for. Firstly, BLE vs Bluetooth. BLE is nothing else than Bluetooth version 4, mostly used in IoT applications. It can run in mobile phones, but is there any compatibility issues? AKA, can a BLE device comunicate with a bluetooth device or do they both need to be using the same bluetooth version? This question comes from

问题 On My Addroid app I'm trying to add some extra data when I try to start ble advertising, and as I've read, advertise data must be <= 31 bytes. That's how I do it: var testData = "abcdefghij" var data = AdvertiseData.Builder().apply { addServiceData( ParcelUuid(MY_UUID), testData.toByteArray(Charsets.UTF_8) ) } bleAdvertiser.startAdvertising( settings.build(), data.build(), advertiseCallback ) In this way everything works well. Now if testData fields become var testData = "abcdefghijk"

问题 I've faced with the issue that after pairing with keys attribute that has permission PERMISSION_READ_ENCRYPTED is still is not available ... Attribute is visible, but permissions is not set for readability, Permissions is empty for this attribute (: In Android documentation only description of this permission, but no example of using such attribute ... Seems like I need somehow to additionally encrypt this connection ... Can somebody share example of using this attribute or link to

问题 I'm running a programm on a Raspberry Pie which is based on QT and uses a bluetooth adapter to connect to some peripheral devices as a central role. I also have another device, which only can act as a Central bluetooth device and needs to be connected to my Raspberry. Is it possible with QT to first build a connection to my second device by advertising itself and acting as a peripheral, and afterwards swaping to central mode, to connect to the other devices? I didn't find any evidence for or

问题 I have a dual-mode (BR/EDR + BLE) device running a GATT server. The address is public and same for BLE and BD/EDR. When I call connectGatt on Galaxy S7 with Android 6.0.1 (API level 23) and set the transport parameter as "TRANSPORT_LE" the phone still tries to establish connection over BD/EDR. It looks like the problem is related to the public address of the BLE because if I set it to private the connection is done over BLE, as expected. This problem was observed only on Galaxy S7, on other

问题 For BLE advertising type LOCAL_NAME_COMPLETE, is there a minimum length requirement? I could not find any length specification in the spec (other than it needs to fit in the advertising packet of 31 bytes minus anything else already in the advertisement packet), but am running into an issue where it may seem that there is. I wanted to confirm here. 回答1: According to the BLUETOOTH SPECIFICATION Version 4.0 [Vol 3] section 12.1: ...The Device Name characteristic value shall be 0 to 248 octets

问题 For BLE advertising type LOCAL_NAME_COMPLETE, is there a minimum length requirement? I could not find any length specification in the spec (other than it needs to fit in the advertising packet of 31 bytes minus anything else already in the advertisement packet), but am running into an issue where it may seem that there is. I wanted to confirm here. 回答1: According to the BLUETOOTH SPECIFICATION Version 4.0 [Vol 3] section 12.1: ...The Device Name characteristic value shall be 0 to 248 octets