BlueZ / Pybluez - 蓝牙LE扫描，同时连接到外围设备(BlueZ/Pybluez - Bluetooth LE scan while connected to peripheral)

 简短问题：是否可以扫描LE设备，同时定期连接到某些设备并读取特征a）一般[协议是否允许]和b）使用BlueZ堆栈？ 
 
 长问题：我正在编写一个Python脚本来扫描广告某个UUID的LE设备。 如果找到一个，我们应该连接，读取特定的特征值（调用此ValueA ），然后断开连接。 我们的想法是保持ValueA存在的实时列表。 我希望能够生成一个启动LE扫描的线程，并将广告事件收集到一个线程安全的容器中。 发现新设备时，应触发处理程序以读取ValueA 。 
 
 我使用PyBluez和BluePy （连接外围设备）的努力都失败了。 当我使用终端命令（ sudo hcitool lescan --duplicates和sudo gatttool -I后跟连接和读取命令）时，如果我在开始扫描后尝试连接（扫描中止），则这些命令会失败 
 
 我很困惑，因为我注意到如果我在开始LE扫描之前通过gatttool连接到设备，我可以启动扫描并继续读取ValueA而不影响扫描，但反之亦然。 
 
 任何见解或良好的BlueZ编程文档将不胜感激。 在Ubuntu 14.10 Macbook Pro上使用BlueZ 4.1 

Short question: Is it possible to scan for LE devices while periodically connecting to some and reading characteristics a) in general [does the protocol allow it] and b) with the BlueZ stack?
 
Long question: I'm writing a Python script to scan for LE devices advertising a certain UUID. If one is found, we should connect, read a specific characteristic value (call this ValueA), and disconnect. The idea is to maintain a real-time list of what ValueA's are present. I want to be able to spawn a thread that starts the LE scans and collects the advertising events into a thread-safe container. When a new device is discovered, a handler should be fired to read ValueA. 
 
My efforts using PyBluez and BluePy (to connect to peripherals) have failed. When I use terminal commands (sudo hcitool lescan --duplicates and sudo gatttool -I followed by the connect and read commands), these fail if I try to connect after I start scanning (scan aborts)
 
I am confused because I notice that if I am connected to a device via gatttool prior to starting an LE scan, I can kick off the scan and continue to read ValueA without impacting the scan, but not vice versa. 
 
Any insights or good BlueZ programming documentation would be appreciated. Using BlueZ 4.1 on Ubuntu 14.10 Macbook Pro

原文：https://stackoverflow.com/questions/29437750