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Bluetooth LE

First time

bluetoothctl
agent on 
default-agent
power on 
scan on
[ get device MAC address ]
scan off
pair <addr> 
connect <addr>

Attempt to connect

sudo bluetoothctl 2>&1 | tee /tmp/bluetooth.out
connect DC:2A:9C:FB:8C:D3 
select-attribute /org/bluez/hci0/dev_DC_2A_9C_FB_8C_D3/service0021/char0022
notify on

Parse output

./parse.pl sample_input/bluetooth.out

Other parsing option

awk -F ":" '{print $3}' bluetooth.out > bt.values

Links

Archlinux Wiki - Bluetooth Bluetooth LE on Raspberry Pi
Bluetooth LE Quick Start
Bluetooth Low Energy Introduction
PerlMonks hex2ascii