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我正在努力与树莓派 3 建立 BLE 连接。

当我进行 1:1 连接时，它工作正常。

root@raspberrypi:~# hciconfig hci0 leadv
root@raspberrypi_SLAVE:~# echo "connect B8:27:EB:5D:C6:1E 1" > /sys/kernel/debug/bluetooth/6lowpan_control
root@raspberrypi:~# hcitool con
Connections:
        < LE B8:27:EB:5D:C6:1E handle 64 state 1 lm MASTER

root@raspberrypi:~# ping -6 -I bt0 2005::b827:ebff:fe5c:b7a0
PING 2005::b827:ebff:fe5c:b7a0(2005::b827:ebff:fe5c:b7a0) from 2005::1 bt0: 56 data bytes
64 bytes from 2005::b827:ebff:fe5c:b7a0: icmp_seq=1 ttl=64 time=164 ms
64 bytes from 2005::b827:ebff:fe5c:b7a0: icmp_seq=2 ttl=64 time=89.1 ms
64 bytes from 2005::b827:ebff:fe5c:b7a0: icmp_seq=3 ttl=64 time=62.9 ms
64 bytes from 2005::b827:ebff:fe5c:b7a0: icmp_seq=4 ttl=64 time=85.6 ms
64 bytes from 2005::b827:ebff:fe5c:b7a0: icmp_seq=5 ttl=64 time=58.9 ms
--- 2005::b827:ebff:fe5c:b7a0 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 58.958/92.193/164.287/37.976 ms

但是当我连接 2 个或更多设备时，它不起作用！

root@raspberrypi:~# hciconfig hci0 leadv
root@raspberrypi_SLAVE2:~# echo "connect B8:27:EB:5D:C6:1E 1" > /sys/kernel/debug/bluetooth/6lowpan_control
root@raspberrypi:~# hcitool con
Connections:
        > LE B8:27:EB:C2:60:83 handle 65 state 1 lm SLAVE
        > LE B8:27:EB:5C:B7:A0 handle 64 state 1 lm SLAVE
root@raspberrypi:~# ping -6 -I bt0 2005::b827:ebff:fe5c:b7a0
PING 2005::b827:ebff:fe5c:b7a0(2005::b827:ebff:fe5c:b7a0) from 2005::1 bt0: 56 data bytes
^C
--- 2005::b827:ebff:fe5c:b7a0 ping statistics ---
28 packets transmitted, 0 received, 100% packet loss, time 28097ms

谁能告诉我如何使用 BLE 6LoWPAN 边界路由器连接多个设备。

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2 回答 2

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我解决了这个问题。问题是最新的 Laspbian 内核，版本 4.14.y。重建 4.9.80-v7+ 后，它工作正常。

于 2018-08-06T07:20:50.857 回答
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这篇文章已经快 2 年了，但它对我帮助很大！

在使用 Raspbian 运行的 Raspberry Pis 4 上出现完全相同的错误。

查看我的内核版本

uname -a

表明它的版本是 4.19.97-v7l+。

我发现降级到 4.9.80-v7+ 应该可以解决问题有点奇怪，所以我只是升级到最新的内核 5.4.40-v7l+

sudo rpi-update

我的 BLE 6loWPAN 连接工作得很好！

因此，4.14 和 4.19 之间的内核版本似乎在 6lowPAN over BLE 方面存在一些问题。在谷歌上找不到原因，但更新修复了它！

于 2020-05-13T11:37:00.640 回答