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ether 00:13:ef:f4:58:ae txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
5) Then you can see a Bluetooth device through the hciconfig command. The node with
the Bus type as USB is the Bluetooth node of RTL8723BU. For the Bluetooth test
method, please refer to the Bluetooth test section
root@orangepir1plus:~# hciconfig
hci0: Type: Primary Bus: USB
BD Address: 00:13:EF:F4:58:AE ACL MTU: 1021:8 SCO MTU: 255:16
UP RUNNING
RX bytes:1631 acl:0 sco:0 events:144 errors:0
TX bytes:26662 acl:0 sco:0 commands:144 errors:0
5.10.1.2. RTL8821CU test
1) First insert the RTL8821CU wireless network card module into the USB interface of
the development board
2) Then the Linux OS will automatically load RTL8821CU related kernel modules, and
you can see the following output through the lsmod command
root@orangepir1plus:~# lsmod | grep "8821"
8821cu 2043904 0
cfg80211 897024 3 8821cu,mac80211,rtl8xxx
3) Through the dmesg command, you can see the loading information of the
RTL8821CU module
root@orangepir1plus:~# dmesg | tail
[ 3987.552017] usb 2-1: Product: 802.11ac NIC
[ 3987.552032] usb 2-1: Manufacturer: Realtek
[ 3987.552046] usb 2-1: SerialNumber: 123456
[ 3987.560377] Bluetooth: hci0: RTL: examining hci_ver=08 hci_rev=000c lmp_ver=08
lmp_subver=8821
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