====== Bluetooth ======

<code bash>
apt-get install bluez bluez-tools d-feet
sudo usermod -a -G bluetooth $USER
sudo setcap 'cap_net_raw,cap_net_admin+eip' `which hcitool`
sudo setcap 'cap_net_raw,cap_net_admin+eip' `which hciconfig`
</code>

===== debug  =====

Enable debug output of ''bluetooth.service'':
<code bash>
systemctl edit bluetooth.service
</code>
<file override>
[Service]
ExecStart=
ExecStart=/usr/libexec/bluetooth/bluetoothd -dn
</file>
NOTE: empty ''ExecStart='' is required to remove previous ''ExecStart'' (to prevent duplicate entries)

<code bash>
systemctl daemon-reload
systemctl restart bluetooth.service
</code>
===== hcitool =====

<code bash>
hciconfig
hciconfig hci0 up
hcitool dev
hcitool lescan

hciconfig hci0 lestates
</code>

===== gatttool =====

gatttool -b AA:BB:CC:DD:EE:FF -I
  * connect
  * characteristics
  * char-read-uuid 00002a00-0000-1000-8000-00805f9b34fb

===== d-feet =====


d-feet


====== CSR 4.0 USB adapter ======

It is based on **CSR 8510 A10** aka **Sitecom CNT-524**
CSR = Cambridge Silicon Radio

Supports BLE:
<code>
usb 3-14: New USB device found, idVendor=0a12, idProduct=0001, bcdDevice=88.91
usb 3-14: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 3-14: Product: CSR8510 A10
</code>

without BLE support:
<code>
usb 3-14: New USB device found, idVendor=0a12, idProduct=0001, bcdDevice=68.17
usb 3-14: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 3-14: Product: CSR8510 A10
</code>

Difference is in **bcdDevice** value, which corresponds to device release number.

<code bash>
hciconfig -a
hci1:	Type: Primary  Bus: USB
	HCI Version: 3.0 (0x5)  Revision: 0x1aa1
	LMP Version: 3.0 (0x5)  Subversion: 0x1aa1
	Manufacturer: Cambridge Silicon Radio (10)

hci0:	Type: Primary  Bus: USB
	HCI Version: 4.0 (0x6)  Revision: 0x22bb
	LMP Version: 4.0 (0x6)  Subversion: 0x22bb
	Manufacturer: Cambridge Silicon Radio (10)
</code>

====== Android APKs ======

  * nRF Connect for Mobile
  * nRF Toolbox for BLE
  * nRF Logger