gatt

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Device used for testing: Nexus 4, Android 4.3 Connection is working fine but the onCharacteristicChanged Method of my callback is never called. However I am registering for notifications using setCharacteristicNotification(char, true) inside onServicesDiscovered and that function even returns true. Device log (there are actually no messages at all when notifications should appear / are sent via the Bluetooth device): 07-28 18:15:06.936 16777-16809/de.ffuf.leica.sketch D/BluetoothGatt: setCharacteristicNotification() - uuid: 3ab10101-f831

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Goal I am developping a simple device running Linux. It is BLE capable, and I am currently using bluez 5.8. I want to trigger an action on this device using an iPhone. What already works: I can make the iPhone "see" the device. The iPhone also connects to the device. I setup the bluetooth device like this on linux (thanks to this question ): # activate bluetooth hciconfig hci0 up # set advertise data: "hello world" hcitool -i hci0 cmd 0x08 0x0008 48 45 4c 4c 4f 57 4f 52 4c 44 # start advertising as connectable hciconfig hci0 leadv 0 The iOS

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Does anyone have a complete working example of how to programmatically pair with a BLE ( not Bluetooth Classic) device that uses passkey entry (i.e. a 6-digit PIN) or Numeric Comparison on Android 4.4 or later? By 'programmatically' I mean I tell Android the PIN - the user isn't prompted. There are many similar questions about this on SO but they are either a) about Bluetooth Classic, b) old (before setPin() and createBond() were public), or c) unanswered. My understanding is as follows. You connect to the device and discover its services.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm working on a project to transfer data between a Bluetooth device (TI CC2650) and android. To do this, it is necessary to perform a reading of the GATT characteristic at a speed of at least 24 kbps. The Bluetooth Low Energy specification allows this transfer rate. I work in Android Studio and use standard libraries for BLE offered by the studio. When requesting a read from a master device, the characteristics of a slave device using the mBluetoothLeService.readCustomCharacteristic () or mBluetoothLeService.readCharacteristic () command is

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am developing an Android app which should subscribe to multiple BLE characteristics. But whatever I do, I receive only the updated values from one characteristic. Here is the code: BluetoothGattCharacteristic characteristicVel = gatt . getService ( BleDefinedUUIDs . Service . KOMMMODUL_SERVICE ). getCharacteristic ( BleDefinedUUIDs . Characteristic . VELOCITY ); gatt . setCharacteristicNotification ( characteristicVel , true ); BluetoothGattDescriptor descriptorVel = characteristicVel . getDescriptor ( BleDefinedUUIDs .

蓝牙是一种短距离的无线通信技术，可以实现固定设备、移动设备之间的数据交换。一般将蓝牙分为两大类，蓝牙3.0规范之前的版本称为传统蓝牙，蓝牙4.0规范之后的版本称为低功耗蓝牙，也就是常说的BLE（Bluetooth Low Energy）。 本文主要讲解的是Android设备与BLE设备之间的通信，Android 从4.3版本（API Level 18）开始支持BLE通信。 看图说话： 首先要判断当前的Android设备是否支持蓝牙，如果支持则再判断当前蓝牙是否处于开启状态，如果未开启则发送广播通知系统开启蓝牙，蓝牙开启后开始搜索周围的蓝牙设备，注意搜索一定要设置超时处理，搜索到指定蓝牙设备后停止搜索任务。 此时可以以列表的形式供用户选择需要连接的设备，或者内部自动连接特定的设备，连接成功后，搜索此蓝牙设备提供的服务（特性、描述符的集合），搜索完成后设置一些对应的参数，即可与蓝牙设备进行通信了。 看下我们在开发过程中需要用到的一些API： 1.BluetoothAdapter 本地蓝牙适配器，用于一些蓝牙的基本操作，比如判断蓝牙是否开启、搜索蓝牙设备等。 2.BluetoothDevice 蓝牙设备对象，包含一些蓝牙设备的属性，比如设备名称、mac地址等。 3.BluetoothProfile 一个通用的蓝牙规范，设备之间按照这个规范来收发数据。 4.BluetoothGatt

With the last release of BlueZ (5.30) the highlight was the completion of the GATT D-Bus apis. My goal is to programmatically (in C), as a BLE client: scan for ble devices (which I can do with the hci layer) Connect to an advertising BLE device Get the UUIDs Execute Read and Write to handles The BlueZ community is strongly suggesting to use the GATT-Dbus api to accomplish this. After multiple searches and head scratching I was not successful to find a proper way or example that would perform this through GATT-DBUs api. It seems more complicate than just use directly the GATT layer.

一.前言 Andorid 5.0 之前是无法进行 外围设备开发的，在Android 5.0 API 21 android.bluetooth.le包下，新增加 Scaner相关类和 Advertiser 相关类。目前最后使用Scanner相关类实现蓝牙扫描。这段时间对蓝牙的学习与理解，对中心设备与周边设备做下面总结。 android.bluetooth.le 1. 2. 3. BlueToothDevice#connectGatt() 如果你对 Central 与 Peripheral 理解的话，就移步下面文章 ！ Android 5.0 BLE 实现中心与外围设备 （待更…） 二. Central 和 Peripheral 1. 蓝牙通信规则 Central Peripheral 客户端-服务端 结构。 Peripheral 客户端（中心设备）： Central Perpheral 如下图所示，心跳监听器提供心跳数据，在你的其他设备的app上 需要以用户友好的方式显示用户的心跳信息。 2.Central 发现并连接广播中的 Peripheral 在BLE中 ， Peripheral Central 提供数据是主要方式。主要操作如下： 服务端 外围设备（ Peripheral ）： 向外广播数据包（Advertising）形式的数据，比如设备名称，功能等！ 客户端 中心设备（

First of all I read SOLVED: GATT callback fails to register and took the steps suggested in that post to solve this issue with no success. The recommended fix in there if you haven't read it is to make all BLE calls from the main thread directly or with a handler. I am working on a BLE app want to run a service (called from activity once every 10 seconds) that performs these tasks: 1)Gets list of our products available to connect to (done, works) 2)For each available device: 2a)connect to device 2b)discover services 2c)read 5 characteristics in this fashion: 2c1)read characteristic 2c2