ORICO BTA-402 USB Bluetooth 4.0 Low Energy Micro Adapter on ODROID-C1
Today I had some fun with Bluetooth Low Energy and my ODROID C1 In an earlier Blog Post I described how to enable Bluetooth Low Energy Support in Yocto.
Recently I bought this ORICO BTA-402 USB Bluetooth 4.0 Low Energy Micro Adapter on Amazon to play with Bluetooth Low Energy. The USB Dongle was automatically detected by my meta-amlogic’s kernel configuration for the ODROID C1
I used the New SimpleLink™ Bluetooth Smart®/Multi-Standard SensorTag as the device to connect to.
On the ODROID-C1 device run the following commands:
root@odroidc1:~# hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 00:1A:7D:DA:71:09 ACL MTU: 310:10 SCO MTU: 64:8
DOWN
RX bytes:547 acl:0 sco:0 events:27 errors:0
TX bytes:384 acl:0 sco:0 commands:27 errors:0
Check if your adapter is DOWN as you can see in the example above. If the adapter is down you have to bring it up befare any other action can take place
hciconfig device up
After this you can re-check if your adapter is UP and RUNNING
root@odroidc1:~# hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 00:1A:7D:DA:71:09 ACL MTU: 310:10 SCO MTU: 64:8
UP RUNNING
RX bytes:10116 acl:72 sco:0 events:364 errors:0
TX bytes:1858 acl:73 sco:0 commands:66 errors:0
Now you can scan for Bluetooth Low Energy devices Please ensure that your SensorTag is in Advertise Mode. Whith the default Firmware this can be achieved by pressing the Power Button.
root@odroidc1:~# hcitool lescan
LE Scan ...
50:C4:7F:6C:18:2C (unknown)
50:C4:7F:6C:18:2C (unknown)
50:C4:7F:6C:18:2C (unknown)
50:C4:7F:6C:18:2C (unknown)
50:C4:7F:6C:18:2C (unknown)
68:C9:0B:06:EF:0B (unknown)
68:C9:0B:06:EF:0B CC2650 SensorTag
68:C9:0B:06:EF:0B (unknown)
68:C9:0B:06:EF:0B CC2650 SensorTag
68:C9:0B:06:EF:0B (unknown)
68:C9:0B:06:EF:0B CC2650 SensorTag
68:C9:0B:06:EF:0B (unknown)
68:C9:0B:06:EF:0B CC2650 SensorTag
50:C4:7F:6C:18:2C (unknown)
After a successful scan we can query some information from the SensorTag
root@odroidc1:~# hcitool leinfo 68:C9:0B:06:EF:0B
Requesting information ...
Handle: 71 (0x0047)
LMP Version: 4.1 (0x7) LMP Subversion: 0x200
Manufacturer: Texas Instruments Inc. (13)
Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Now lets connect to the SensorTag
root@odroidc1:~# hcitool lecc 68:C9:0B:06:EF:0B
Connection handle 71
After this we can use the gatttool from the BlueZ5 package to connect to the GATT Server on the SensorTag
root@odroidc1:~# gatttool -b 68:C9:0B:06:EF:0B --interactive
[68:C9:0B:06:EF:0B][LE]>
Establish a connection to the GATT Server
[68:C9:0B:06:EF:0B][LE]> connect
Attempting to connect to 68:C9:0B:06:EF:0B
Connection successful
Scan for Primary UUIDs
[68:C9:0B:06:EF:0B][LE]> primary
attr handle: 0x0001, end grp handle: 0x0007 uuid: 00001800-0000-1000-8000-00805f9b34fb
attr handle: 0x0008, end grp handle: 0x000b uuid: 00001801-0000-1000-8000-00805f9b34fb
attr handle: 0x000c, end grp handle: 0x001e uuid: 0000180a-0000-1000-8000-00805f9b34fb
attr handle: 0x001f, end grp handle: 0x0026 uuid: f000aa00-0451-4000-b000-000000000000
attr handle: 0x0027, end grp handle: 0x002e uuid: f000aa20-0451-4000-b000-000000000000
attr handle: 0x002f, end grp handle: 0x0036 uuid: f000aa40-0451-4000-b000-000000000000
attr handle: 0x0037, end grp handle: 0x003e uuid: f000aa80-0451-4000-b000-000000000000
attr handle: 0x003f, end grp handle: 0x0046 uuid: f000aa70-0451-4000-b000-000000000000
attr handle: 0x0047, end grp handle: 0x004b uuid: 0000ffe0-0000-1000-8000-00805f9b34fb
attr handle: 0x004c, end grp handle: 0x0050 uuid: f000aa64-0451-4000-b000-000000000000
attr handle: 0x0051, end grp handle: 0x0058 uuid: f000ac00-0451-4000-b000-000000000000
attr handle: 0x0059, end grp handle: 0x0060 uuid: f000ccc0-0451-4000-b000-000000000000
attr handle: 0x0061, end grp handle: 0xffff uuid: f000ffc0-0451-4000-b000-000000000000
To receive notifications on Key Press Events send the following to the device
[68:C9:0B:06:EF:0B][LE]> char-write-req 4a 0100
Notification handle = 0x0049 value: 01
Notification handle = 0x0049 value: 00
Notification handle = 0x0049 value: 01
Notification handle = 0x0049 value: 00
Notification handle = 0x0049 value: 01
Notification handle = 0x0049 value: 00
Notification handle = 0x0049 value: 01
Notification handle = 0x0049 value: 00
Now each key press and release should be displayed in the gatttool. Frankly this key press event notification is just copy past from this vine posting.