[root@artik examples]# pip list | grep metawear
metawear       0.3.1
pymetawear     0.10.0rc1
[root@artik examples]# pip list | grep gatt
gattlib        0.20171002
pygatt         3.2.0
[root@artik examples]# cat led.py
# usage: python led.py [mac]
from mbientlab.metawear import MetaWear, libmetawear
from mbientlab.metawear.cbindings import *
from time import sleep
from threading import Event

import sys

#device = MetaWear(sys.argv[1])
device = MetaWear("D5:7F:E1:0A:9E:98")
device.connect()
print("Connected")

pattern= LedPattern(repeat_count= Const.LED_REPEAT_INDEFINITELY)
libmetawear.mbl_mw_led_load_preset_pattern(byref(pattern), LedPreset.SOLID)
libmetawear.mbl_mw_led_write_pattern(device.board, byref(pattern), LedColor.GREEN)
libmetawear.mbl_mw_led_play(device.board)

sleep(5.0)

libmetawear.mbl_mw_led_stop_and_clear(device.board)
sleep(1.0)

device.disconnect()
sleep(1.0)

// Before powering on the metamotionC

[root@artik examples]# python3 led.py
Traceback (most recent call last):
  File "led.py", line 11, in <module>
    device.connect()
  File "/usr/local/lib/python3.5/dist-packages/pymetawear-0.10.0rc1-py3.5.egg/mbientlab/metawear/__init__.py", line 155, in connect
    self.gatt.connect(True, channel_type='random')
RuntimeError: Channel or attrib not ready
[root@artik examples]# python3 led.py
Traceback (most recent call last):
  File "led.py", line 11, in <module>
    device.connect()
  File "/usr/local/lib/python3.5/dist-packages/pymetawear-0.10.0rc1-py3.5.egg/mbientlab/metawear/__init__.py", line 155, in connect
    self.gatt.connect(True, channel_type='random')
RuntimeError: Channel or attrib not ready

// After powering on the metamotionC

[root@artik examples]# python3 led.py
[  480.280000] pgd = ffffffc0286c7000
[  480.280000] [00000030] *pgd=0000000068fdc003, *pud=0000000068fdc003, *pmd=0000000000000000
Segmentation fault
[root@artik examples]#