Enable Bluetooth

Following the steps below to enable the Bluetooth:

Perform the steps bellow to initialize Bluetooth:
1. Perform the following command to bring up hci interface.
```
#hciconfig hci0 up
```

Perform the following command to check Bluetooth device status:

# hciconfig
hci0: Type: BR/EDR Bus: UART
BD Address: 43:30:B1:00:00:00 ACL MTU: 1021:8 SCO MTU: 64:1
UP RUNNING
RX bytes:1011 acl:0 sco:0 events:39 errors:0
TX bytes:208 acl:0 sco:0 commands:39 errors:0

Perform the following to scan Bluetooth devices:

# hcitool scan 
Scanning ...
00:22:43:A0:A7:0A n/a
00:10:60:56:56:7B hhhh
00:1A:6B:85:F3:67 n/a
00:22:43:A0:A7:48 AmUrO
00:1F:E1:E1:A1:8F GEMTEK-8AE51F68

You can also enter Bluetooth interactive interface by using Bluetoothctl tool. Bluetoothctl has many functions, which can be seen through execute help command. The following list are some example commands:
- Enter the tool:
```
bluetoothctl
```
  - Check:
```
default-agent
```
  - Register agent:
```
agent on
```
  - Scan:
```
scan on
```
  - Stop scan:
```
scan off
```
  - View the matching devices:
```
devices
```
  - Find the pair devices:
```
pair xx:xx:xx:xx:xx:xx
```
  - Add trust devices:
```
trust xx:xx:xx:xx:xx:xx
```
  - Connect devices:
```
connect xx:xx:xx:xx:xx:xx
```