bluez | 易学教程

How to scan for Bluetooth low energy devices using bluez API

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I'm new in programming Bluetooth low energy using BlueZ. I want to develop a native code c to scan nearby devices using a BlueZ API for Bluetooth low energy under Android 4.0.3. Anyone know which BlueZ methods I should use? If you're looking to write native c code to scan BLE devices, your best option would be to get the bluez package from here and look at how that is implemented. For scanning for devices, see the /tools/hcitool.c source file, specifically the function static void cmd_lescan(int dev_id, int argc, char **argv) and understand how that is implemented. I hope this helps. 来源： https

Check battery level of connected bluetooth device on linux

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问题 How can I check the battery level of a connected bluetooth device? The device shows the battery level on Android so I'm assuming the device supports the GATT-based Battery Service. However, by entering "menu gatt" in bluetoothctl and then listing the GATT attributes of the device with "list-attributes [dev]", nothing shows up. A similar question was posted to SO but the OP seems to have found a solution that doesn't work for me. When I run "info [dev]" in bluetoothctl I don't see the UUID for

BlueZ Bluetooth API and distance calibration precision

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问题 I am using BlueZ C API to program my bluetooth mouse to read the distance. I have set up a bluetooth dongle. At the moment, I have to move the mouse at least 5-10 feet from the laptop (bluetooth dongle) to get some reading of RSSI. Below this distance, I get most of the readings as 0. Is there any way to use this API to get more precise value of RSSI so that we can track the distance in this range? int8_t Bluetooth::read_rssi(int to) { int dd = hciSocket; struct hci_conn_info_req *cr; bdaddr

Android之蓝牙驱动开发总结

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一 Bluetooth 基本概念 3 二 AndroidBluetooth 架构 3 2.1Bluetooth 架构图 3 2.2Bluetooth 代码层次结构 3 三 Bluetooth 协议栈分析 4 3.1 蓝牙协议栈 4 3.2Android 与蓝牙协议栈的关系 6 四 Bluetooth 之 HCI 层分析 6 4.1HCI 层与基带的通信方式 6 4.2 包的分析及研究 7 4.3 通信过程的研究与分析 8 五 Bluetooth 之编程实现 8 5.1HCI 层编程 8 5.2L2CAP 层编程 11 5.3SDP 层编程 13 六 Bluetooth 之启动过程实现 14 6.1Bluetooth 启动步骤 14 6.2Bluetooth 启动流程 15 6.3Bluetooth 数据流向 15 6.4Bluez 控制流程 15 6.5Bluetooth 启动过程分析 16 七 Bluetooth 之驱动移植 17 7.1android 系统配置 17 7.2 启动项修改 17 7.3 电源管理 rfkill 驱动 17 7.4Rebuild Android image and reboot 18 7.5 实现 BT 睡眠唤醒机制 18 7.6 系统集成 19 八 Bluetooth 之调试与编译 19 8.1Bluetooth 驱动调试 19 8

BluezV5.42 DBUS C API for BLE?

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I have developed BLE application for openwrt using BLUEZV5.30 . I was able to create the application by extracting source code gatttool and hcitool . I have also added few more functionality then provided by these tools (like reading rssi ). However, i have upgraded my bluez stack to 5.42 and i am planning to use DBUS interface for all BLE related operations. The functionality i want: Reading RSSI Connecting and Disconnecting Bonding Pairing Deleting Bonding information Discovery Scanning Advertising Write/Reading to Characteristics Notifications and Indications I was able to perform all the

Linux command line howto accept pairing for bluetooth device without pin

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问题 Is there a way to pair a device in linux without requiring a pin(for testing purposes so I need it to be done w/out human interaction, assuming you have root access)? bluez-simple-agent seems to require a pin except with some simple devices such as mice. 回答1: Try setting security to none in /etc/bluetooth/hcid.conf http://linux.die.net/man/5/hcid.conf This will probably only work for HCI devices (mouse, keyboard, spaceball, etc.). If you have a different kind of device, there's probably a

Raspberry Pi Bluetooth 4.0 Connection

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I am trying to connect to a Raspberry Pi via iPhone using CoreBluetooth (bluetooth 4.0). I have discovered the device and send out a connection request using this code: if (peripheral != self.foundPeripheral) { NSLog(@"Try to connect to %@", peripheral.name); self.foundPeripheral = peripheral; [self.centralManager stopScan]; [self.centralManager connectPeripheral:peripheral options:nil]; } Neither the didConnectPeripheral or didFailedToConnectPeripheral are called. I also made sure to set the RPi to advertise bluetooth low energy using sudo hciconfig hci0 leadv but when I check active

read rssi of bluetooth low-energy beacon using bluez5

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问题 I want to read the RSSI simultaneously of an bluetooth lowenergy beacon, on 2 bluetooth le usb adapters. I'm using a fedora 20 system with bluez 5 and the LogiLink BT0015 adapters (CSR chip). My code works like a charm when only one adapter is connected, but after connecting the second adapter i'm receiving input/output errors. Does anybody know what's wrong with the code? Is there another way to read out the RSSI? #include <rssi.h> #include <stdio.h> #include <string.h> #include <errno.h>

C/C++ BLE read/write example with Bluez

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问题 I am starting to build up a simple BLE network with a microcontroller and a raspberry pi (tardis BLE dongle). As a starting point, I am looking for a simple C or C++ example to read/write a BLE device, similar to what I am able to do over the command line. The examples I have found so far are quite complicated. As a BLE beginner I need some very simple examples to build from before moving forward with a more complicated design. I am okay with hard-coding the BLE device name as I have in the

Cannot connect to BLE device on Raspberry Pi

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I'm trying to connect to a BLE device (Heart rate sensor, Polar H7), on a Raspberry Pi 2. I use the last version of bluez (5.35) found here: http://www.bluez.org/download/ But when I'm trying to connect using gatttool , I always have "connection refused" error. Here is what I do : pi@raspberrypi ~ $ sudo su root@raspberrypi:/home/pi# hciconfig dev hci0: Type: BR/EDR Bus: USB BD Address: 5C:F3:70:69:54:3D ACL MTU: 1021:8 SCO MTU: 64:1 DOWN RX bytes:616 acl:0 sco:0 events:34 errors:0 TX bytes:380 acl:0 sco:0 commands:34 errors:0 root@raspberrypi:/home/pi# hciconfig dev up root@raspberrypi:/home