bluepy.btle.BTLEException: Failed to execute mgmt cmd 'le on'

[edouardkleinhans]

Hello,

I'm trying to run you sample code (http://ianharvey.github.io/bluepy-doc/scanner.html#sample-code) on my orangepi with a bluetoot v4 dongle, but it doesn"t work.

root@orangepipcplus:~# lsusb
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

root@orangepipcplus:~# hcitool dev
Devices:
hci0 00:1A:7D:DA:71:13

root@orangepipcplus:~# python test.py
Traceback (most recent call last):
File "test.py", line 14, in
devices = scanner.scan(10.0)
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 679, in scan
self.start(passive=passive)
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 617, in start
self._mgmtCmd("le on")
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 276, in _mgmtCmd
"Failed to execute mgmt cmd '%s'" % (cmd))
bluepy.btle.BTLEException: Failed to execute mgmt cmd 'le on'

Any idea of what's wrong ?

[PrzemoF]

Did you try with sudo?

[edouardkleinhans]

all the command are executed as root.

[goldfingyr]

I think I have the same problem just with the TI Sensortag (running as root - debugging on). Running on a Raspberry Pi with a BLE USB; hcitool is able to scan:

sudo python sensortagcollector.py
Running /usr/local/lib/python2.7/dist-packages/bluepy/bluepy-helper
Sent: le on

Got: ''
Got: ''
Got: ''
Got: ''
Got: ''
Got: ''
Sent: le on

Traceback (most recent call last):
File "sensortagcollector.py", line 317, in
devices = scanner.scan(timeout=30.0)
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 674, in scan
self.start()
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 612, in start
self._mgmtCmd("le on")
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 271, in _mgmtCmd
self._writeCmd(cmd + '\n')
File "/usr/local/lib/python2.7/dist-packages/bluepy/btle.py", line 267, in _writeCmd
self._helper.stdin.write(cmd)
IOError: [Errno 32] Broken pipe

[rmesnard]

Same issue for me.
On a Orange PI Zero , i've try 2 different USB adapter ( CSR 4.0 and Orico ) Both working perfectly with hcitools.

Scanning for devices... Traceback (most recent call last): File "/usr/local/bin/blescan", line 9, in <module> load_entry_point('bluepy==1.1.2', 'console_scripts', 'blescan')() File "/usr/local/lib/python2.7/dist-packages/bluepy/blescan.py", line 122, in main devices = scanner.scan(arg.timeout) File "/usr/local/lib/python2.7/dist-packages/bluepy/bluepy/btle.py", line 679, in scan self.start(passive=passive) File "/usr/local/lib/python2.7/dist-packages/bluepy/bluepy/btle.py", line 617, in start self._mgmtCmd("le on") File "/usr/local/lib/python2.7/dist-packages/bluepy/bluepy/btle.py", line 276, in _mgmtCmd "Failed to execute mgmt cmd '%s'" % (cmd)) bluepy.bluepy.btle.BTLEException: Failed to execute mgmt cmd 'le on'

I try to rebuild helper with the same results.

[Ishma59]

same problem on my kali linux 2017 I try running :
$sudo bleah t0
BTLE Exception:
Failed to execute mgmt cmd 'le on'

[Ishma59]

any help thanks in advance

[songyawen]

I have the same question. (2017kali\bleah ) Thanks for any help!!!!!!

[SHA89]

What output does bluepy-helper give when you run it directly?
/usr/local/lib/python2.7/dist-packages/bluepy/bluepy-helper 0 help le on

[rosshadden]

I had the same error, but sudo makes it work for me. Do we know which group or permissions it requires? I would like to make it run with my user.

[SHA89]

sudo setcap 'cap_net_raw,cap_net_admin+eip' bluepy-helper
This gives everyone permission to execute bluepy-helper.

[hasamba]

i'm getting:
MQTT connection returned result: Connection Accepted. Traceback (most recent call last): File "miscalegw.py", line 99, in <module> main() File "miscalegw.py", line 96, in main devices = scanner.scan(5) File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 679, in scan self.start(passive=passive) File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 617, in start self._mgmtCmd("le on") File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 276, in _mgmtCmd "Failed to execute mgmt cmd '%s'" % (cmd)) bluepy.btle.BTLEException: Failed to execute mgmt cmd 'le on'

i tried all the answer i could find, tried running as root, with sudo, i checked the interface and it's 0
def init(self, iface=0):

anyone can help?

[SHA89]

have you tried running bluepy-helper directly and tried to execute "le on" manually?

[hasamba]

im getting: "bluepy-helper: command not found"
eventough i can see the file and it is executeable

[SHA89]

I guess you are not so familiar with linux command line.
to run the executable, you must execute it the following way:
./bluepy-helper 0
If you forget the "./", the system will assume you try to start a program that is available in your PATH.
With the "./" you give the direct address of your executable.
The "0" defines the interface you want to use. If you only have one bluetooth interface, 0 will be correct,
if you have multiple, you can use 1, ...

If the program complains about permissions, try it again with super user rights:
sudo ./bluepy-helper 0

[hasamba]

thanks for your explanation, i learned something new :)
im running now /usr/local/lib/python3.5/dist-packages/bluepy $ ./bluepy-helper 0 help le on
and im not getting any response, just the curser blinking, is that ok?

same with sudo

[SHA89]

if you type 'help' you will see all possibilities.
As i can see in your error message, your problem already occurs when trying to execute the command
le on (to put it in bluetooth low energy mode)
so i suggest you try that command.

[hasamba]

for some reason "help" also doesnt give me any result...just blinking

[SHA89]

i'm using it in python 2.7 but i'll set up a 3.5 to test

[SHA89]

(venv) ~/python_sandbox/test_bluepy3/venv/lib/python3.5/site-packages/bluepy $sudo ./bluepy-helper 0
help
#help Show this help
#stat Show current status
#quit Exit interactive mode
#conn [address [address type [interface]]] Connect to a remote device
#disc Disconnect from a remote device
#svcs [UUID] Primary Service Discovery
#incl [start hnd [end hnd]] Find Included Services
#char [start hnd [end hnd [UUID]]] Characteristics Discovery
#desc [start hnd] [end hnd] Characteristics Descriptor Discovery
#rd Characteristics Value/Descriptor Read by handle
#rdu [start hnd] [end hnd] Characteristics Value/Descriptor Read by UUID
#wrr Characteristic Value Write (Write Request)
#wr Characteristic Value Write (No response)
#secu [low | medium | high] Set security level. Default: low
#mtu Exchange MTU for GATT/ATT
#le [on | off] Control LE feature on the controller
#pairable [on | off] Control PAIRABLE feature on the controller
#pair Start pairing with the device
#unpair Start unpairing with the device
#scan Start scan
#scanend Force scan end
#pasv Start passive scan
#pasvend Force passive scan end
rsp=$stat state=$disc mtu=h0 sec='low

It seems to work on my computer. I also have a blinking cursor, but if i type help, i do get this help message.
And have you tried other commands? Do you see "help" appearing on your blinking cursor as you type? don't forget to press enter.

[SHA89]

Just to be sure, you have to start the program with
sudo ./bluepy-helper 0
and after it's started, you need to type 'help' or 'le on'

[flatsiedatsie]

Same error, but when doing multiple calls in quick succession.
Python 3.4 on a Pi Zero W with Dietpi Stretch.

2018-02-20 17:23:54.673 Error: (Mi Flower Mate) ----> Line 55 in /home/pi/domoticz/plugins/mi_flower_mate/miflora/backends/bluepy.py, function connect
2018-02-20 17:23:54.673 Error: (Mi Flower Mate) ----> Line 353 in /usr/local/lib/python3.4/dist-packages/bluepy/btle.py, function init
2018-02-20 17:23:54.674 Error: (Mi Flower Mate) ----> Line 402 in /usr/local/lib/python3.4/dist-packages/bluepy/btle.py, function _connect

(working on a plugin that uses this library: https://github.com/flatsiedatsie/Mi_Flower_mate_plugin)

[shumingli708]

I typed 'le on' on bluepy-helper, and I got 'rsp=$mgmt code=$protoerr'.

[hasamba]

now im able to run and getting same message: rsp=$mgmt code=$protoerr

[SHA89]

i also get the protoerr if i'm not running as superuser (sudo ./bluepy-helper 0).

1. So first you need to check if you have the problem as sudo-user
   sudo ./bluepy-helper 0
le on
2. If it works with sudo, and you want to be able to run it as a normal user, you need to set capabilities on the executable. try:
   sudo setcap 'cap_net_raw,cap_net_admin+eip' bluepy-helper
   (make sure u are in the directory with the bluepy-helper executable)
   I don't know exactly what this does, but it allows me to run bluepy-helper without root privileges (sudo)
3. Now you can run it as a normal user with
   ./bluepy-helper 0

If you have problems, please post the commands you used and the output.
FIY i'm running it on ubuntu 16.04 and tested it with python 3.5

[hasamba]

i ran it before with sudo.

sudo ./bluepy-helper 0 le on rsp=$mgmt code=$protoerr

im on mint (ubuntu 16.04), python 3.5.2

[SHA89]

In that case i don't have an explanation, my solution was the capabilities..
Maybe have a try with gatttool to see if you can set up a connection, and hciconfig to check if your bluetooth interfaces are up and running

[hasamba]

thanks again for all your help

[flatsiedatsie]

Here the issue still persists if there are multiple calls in a row:

https://www.domoticz.com/forum/viewtopic.php?f=65&t=22281

on Domoticz plugins are run an root, so that's not an issue.

[jamestouri]

Hi, was anyone able to solve this problem? I have been stuck on it for a while and I still get the same error
bluepy.btle.BTLEException: Failed to execute mgmt cmd 'le on'

[mohithkalyan]

Failed to execute mgmt cmd 'le on'.

[PrzemoF]

I'm still testing, but this works [EDITED]:

1. Start from one terminal:
   sudo /usr/local/lib/python3.6/site-packages/bluepy/bluepy-helper 0
   or wherever you have bluepy-helper
2. Type "le on" and you should get this:
   rsp=$mgmt code=$success
3. Do whatever you need to do from another terminal.

[warpdriv]

Ran @PrzemoF 's post and got rsp=$mgmt�code=$mgmterr�estat=h11�emsg='Invalid Index

on 16.04, py 3.7

Help us Obiwon Kanobi! You're our only hope!

[roshradha]

I'm still testing, but this works [EDITED]:

1. Start from one terminal:
   sudo /usr/local/lib/python3.6/site-packages/bluepy/bluepy-helper 0
   or wherever you have bluepy-helper
2. Type "le on" and you should get this:
   rsp=$mgmt code=$success
3. Do whatever you need to do from another terminal.

I tried the same and I got:
rsp=$mgmtcode=$mgmterrestat=hBemsg='Rejected

What should I do next?

[Tasm-Devil]

Hi.
The Error still exists.
With sudo it works:

me@mypc:~$ sudo ./.local/lib/python3.6/site-packages/bluepy/bluepy-helper 0

\# bluepy-helper.c version 1.3.0 built at 20:40:35 on May  3 2019
le on
rsp=$mgmt�code=$success

But without sudo it wont:

me@mypc:~$ sudo setcap 'cap_net_raw,cap_net_admin+eip' ./.local/lib/python3.6/site-packages/bluepy/bluepy-helper

me@mypc:~$ ./.local/lib/python3.6/site-packages/bluepy/bluepy-helper 0

\# bluepy-helper.c version 1.3.0 built at 20:40:35 on May  3 2019
le on
rsp=$mgmt�code=$mgmterr�estat=h14�emsg='Permission Denied

Are there any plans to fix it. I want to use bt-mqtt-gateway to get a connection to an nrf52840 running circuitpython.

[doronator]

Note that when running python scripts with sudo,
your normal user and the super-user ivoked by sudo,
may have a different default python location.

When using sudo with running a python script you may need to specify the full system path to the version of python you inteend to run

[dima72]

I'm running on Rasbian PC.
sudo ./bluepy-helper 0

and getting

le on
rsp=$mgmtcode=$mgmterrestat=h11emsg='Invalid Index

please suggest what might be wrong?

[fphammerle]

Re: #218 (comment)

sudo setcap 'cap_net_raw,cap_net_admin+eip' bluepy-helper
This gives everyone permission to execute bluepy-helper.

cap_net_admin,cap_net_raw+ep without i ("inheritable") is sufficient:

$ sudo setcap cap_net_raw,cap_net_admin+ep bluepy-helper
$ getcap bluepy-helper
bluepy-helper = cap_net_admin,cap_net_raw+ep
$ bluepy-helper
# bluepy-helper.c version 1.3.0 built at 06:27:58 on Jul 16 2019
le on
rsp=$mgmtcode=$success
$ uname -r
5.10.17-v7l+

[EricRongkai]

I'm running on Rasbian PC.
sudo ./bluepy-helper 0

and getting

le on
rsp=$mgmtcode=$mgmterrestat=h11emsg='Invalid Index

please suggest what might be wrong?

Firstly, make sure that your BLE device is existing, using following command

$ hciconfig

If the device is existing, it will like this

hci0: Type: Primary Bus: USB BD Address: 00:1A:7D:DA:71:11 ACL MTU: 310:10 SCO MTU: 64:8 UP RUNNING RX bytes:883983 acl:0 sco:0 events:23598 errors:0 TX bytes:6053 acl:0 sco:0 commands:160 errors:0

Your error is because that the BLE device is not activated. You can use this command to activate it.

$ sudo hciconfig [hci0] up

[santobedi]

Hello @EricRongkai,

$ hciconfig gave me

Command 'hciconfig' not found, but can be installed with:

sudo snap install bluez  # version 5.48-3, or
sudo apt  install bluez  # version 5.53-0ubuntu3.3

I installed sudo apt install bluez # version 5.53-0ubuntu3.3 and ran $ sudo hciconfig [hci0] up, however, I get Can't get device info: No such device. Same thing happened with sudo snap install bluez # version 5.48-3.

Now, when I run hciconfig, nothing happens. I still get rsp=$mgmtcode=$mgmterrestat=h11emsg='Invalid Index after le on command.