Gatttool：仅限于5个连接？ [英] Gatttool: Limited to 5 connections?

问题描述

我通过在Python Pexpect的产卵gatttools *连接到五台设备。当我尝试连接到第六装置（使用相同的CSR 4.0加密狗所有连接）手动我遇到的问题：

I connect to five devices by spawning gatttools with pexpect in python*. When I try to connect to a sixth device (using the same CSR 4.0 dongle for all connections) manually I encounter:

sudo gatttool -b DC:05:4F:BC:F6:4A -It random
[DC:05:4F:BC:F6:4A][LE]> connect
Attempting to connect to DC:05:4F:BC:F6:4A
Error: connect error: Too many links (31)

这是一个gatttool限制或硬件限制？我在克隆 http://git.kernel.org/cgit/bluetooth/bluez源。混帐跑的grep -r，试图，但没有得到任何结果。

Is this a gatttool limitation or a hardware limitation? I cloned the source at http://git.kernel.org/cgit/bluetooth/bluez.git and ran grep -r "attempting" but did not get any results.

我想连接到20台设备通过蓝牙低能量，我认为应该是可能的硬件和固件明智的。

I would like to connect to 20 devices over bluetooth low energy, which I think should be possible hardware- and firmware-wise.

=====

系统设置：Ubuntu的14.04，bluez的V5.20，CSR 4.0加密狗，Adafruit的BLE nrf8001突破

System settings: Ubuntu 14.04, bluez v5.20, CSR 4.0 dongle, adafruit ble nrf8001 breakout.

参考：

• 直接使用C文件，而不是Pexpect的：<一href=\"http://stackoverflow.com/questions/16224561/multiple-ble-connections-using-linux-and-bluez-5-0\">Multiple使用Linux和配合bluez 5.0 BLE连接


• Pexpect的： https://gist.github.com/nouyang/2a6a733d8facd23115a4


• 设置/ Pexpect的code的说明： http://www.orangenarwhals.com/？ p = 911

• using the c files directly instead of pexpect: Multiple BLE Connections using Linux and Bluez 5.0
• pexpect: https://gist.github.com/nouyang/2a6a733d8facd23115a4
• explanation of setup/pexpect code: http://www.orangenarwhals.com/?p=911

推荐答案

啊！ Linux的蓝牙名单上有人回答我的问题，虽然我还没有证实此事为自己尚未：

Ah! Someone on the linux-bluetooth list answered my question, although I haven't verified it for myself yet:

这是CSR加密狗硬件限制。我做了一个类似的使用测试bluetoothctl不久前：使用CSR加密狗，只有5蓝牙LE的设备可以连接。随着博通加密狗（BCM20702）我可以建立14个并发连接。然后我跑出去蓝牙LE设备......

It is a hardware limitation of the CSR dongle. I did a similar test using bluetoothctl not long ago: Using a CSR dongle, only 5 bluetooth LE devices could connect. With a Broadcom dongle (BCM20702) I could establish 14 concurrent connections. Then I ran out of bluetooth LE devices....

问候，
  马丁Rösch

Regards, Martin Rösch

http://thread.gmane.org/gmane.linux.bluez。内核/ 51872

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