Yun & Compatible

Details

Written by Sonny Yu

• Hardware and Yun

USB Bluetooth 4.0 Adapter

echo 0a5c 21e8> /sys/bus/usb/drivers/btusb/new_id

hciconfig hci0 up

Confirm it works:

root@Arduino:~# hciconfig
hci0:   Type: BR/EDR  Bus: USB
        BD Address: 00:02:72:33:96:0A  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING
        RX bytes:2145 acl:0 sco:0 events:84 errors:0
        TX bytes:187 acl:0 sco:0 commands:42 errors:0

hcitool lescan --duplicates 1>/dev/null &

root@Arduino:~# hcidump -a
HCI sniffer - Bluetooth packet analyzer ver 5.13
device: hci0 snap_len: 1500 filter: 0xffffffff
> HCI Event: LE Meta Event (0x3e) plen 39
    LE Advertising Report
      ADV_IND - Connectable undirected advertising (0)
      bdaddr D0:B7:E8:DE:F3:00 (Random)
      Complete local name: 'Rtrivr_R621'
      Unknown type 0x19 with 2 bytes data
      Flags: 0x06
      TX power level: 0
      Complete service classes: 0xf000
      RSSI: -68
> HCI Event: LE Meta Event (0x3e) plen 12
    LE Advertising Report
      SCAN_RSP - Scan Response (4)
      bdaddr D0:B7:E8:DE:F3:00 (Random)
      RSSI: -65

Move iBeacon further a part distance will reduce RSSI, -6dB seems to be double the distance.

http://stackoverflow.com/questions/13705647/finding-distance-from-rssi-value-of-bluetooth-low-energy-enabled-device

Details

Written by Sonny Yu

• Hardware and Yun

root@Arduino:~# lsusb
...
Bus 001 Device 005: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0

Install Bluetooth software:

opkg update 
opkg install kmod-bluetooth bluez-libs bluez-utils

Manually mount it:

root@Arduino:~# echo 0a5c 21e8> /sys/bus/usb/drivers/btusb/new_id

root@Arduino:~# hciconfig
hci0:   Type: BR/EDR  Bus: USB
       BD Address: 00:02:72:33:96:0A  ACL MTU: 1021:8  SCO MTU: 64:1
       DOWN
       RX bytes:489 acl:0 sco:0 events:20 errors:0
       TX bytes:86 acl:0 sco:0 commands:20 errors:0

Plugable® USB Bluetooth 4.0 Low Energy Micro Adapter

Amazon Price:$11.95

IOGEAR Bluetooth 4.0 USB Micro Adapter

Amazon Price:$11.77

Details

Written by Sonny Yu

• Bridge Library

ATmega32U4 code:

#include <Bridge.h>
void setup()
{
    	Bridge.begin();    
}
void loop()
{
	char lbuffer[256]; 
	Bridge.get("D12", lbuffer, 256); 
     	Bridge.put("D13", String(random(1, 100)));
	delay(1000);	
}

nano bridge.py

#!/usr/bin/python
import sys
sys.path.insert(0, '/usr/lib/python2.7/bridge/')
from bridgeclient import BridgeClient as bridgeclient
value = bridgeclient()
value.put("D12","Test")
print value.get('D13')

chmod 755 bridge.py
./bridge.py