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I am trying to create a custom script, which has to run automatically during boot. The custom script is running a python script which is using bluetooth. When I run this following line :

systemctl start myCustomService.service

The script works perfectly !

However when I reboot the computer, I have this following error :

[localhost]# systemctl status myCustomService.service -l

myCustomService.service.service - MycustomScript program

Loaded: loaded (/etc/systemd/system/myCustomService.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since Thu 2019-02-21 15:03:38 CET; 1min 39s ago Process: 821 ExecStart=/.../mycustomScript.sh (code=exited, status=1/FAILURE) Main PID: 821 (code=exited, status=1/FAILURE)

Feb 21 15:03:38 localhost mycustomScript.sh[821]: During handling of the above exception, another exception occurred: Feb 21 15:03:38 localhost mycustomScript.sh[821]: Traceback (most recent call last):

Feb 21 15:03:38 localhost mycustomScript.sh[821]: File "main.py", line 69, in

Feb 21 15:03:38 localhost mycustomScript.sh[821]: profiles=[SERIAL_PORT_PROFILE],

Feb 21 15:03:38 localhost mycustomScript.sh[821]: File "/usr/local/lib/python3.6/site-packages/bluetooth/bluez.py", line 266, in advertise_service

Feb 21 15:03:38 localhost mycustomScript.sh[821]: raise BluetoothError (*e.args)

Feb 21 15:03:38 localhost mycustomScript.sh[821]: bluetooth.btcommon.BluetoothError: error no advertisable device.

Feb 21 15:03:38 localhost mycustomScript.sh[1]: sample.service: main process exited, code=exited, status=1/FAILURE

Feb 21 15:03:38 localhost mycustomScript.sh[1]: Unit sample.service entered failed state.

Feb 21 15:03:38 localhost mycustomScript.sh[1]: sample.service failed.

My service is running after bluetooth services, hence, I don't understand why I have this error.

PS : I am using Centos 7

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Your Python script exits with an error on line 266. Systemd has no idea why it happened but gives you the actual program output in error messages:

File "/usr/local/lib/python3.6/site-packages/bluetooth/bluez.py", line 266, in advertise_service
raise BluetoothError (*e.args)

Feb 21 15:03:38 localhost mycustomScript.sh[821]: bluetooth.btcommon.BluetoothError: error no advertisable device.

Feb 21 15:03:38 localhost mycustomScript.sh[1]: sample.service: main process exited, code=exited, status=1/FAILURE

A dirty workaround in such situations is to add 

ExecStartPre=bash -c "sleep 30"

or as many seconds as you think your system needs to start bluetooth devices

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  • The problem is coming from the bluetooth device, which is not activated when my script starts, however, I am using Requires and After to wait for the bluetooth activation. But it stills doesn't work
    – vijayakm
    Commented Feb 26, 2019 at 10:23
  • I solved it ! I added this command on my bash script : " hciconfig hci0 piscan sleep 30" Quite dirty workaround but... I didn't find something else
    – vijayakm
    Commented Feb 28, 2019 at 15:21
  • Does not really matter where you pause it )
    – Igor Voltaic
    Commented Feb 28, 2019 at 15:23

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