error cli on rpi

[minscof]

Thanks for your code. I bought a danfoss eco valve, and I try to manage it.
When I launch the scan in root, I have this error

(libetrv) root@rpiA-parents:/home/pi/libetrv# python3 -m libetrv.cli scan
Detected eTRV devices:
Traceback (most recent call last):
File "/usr/lib/python3.5/runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/pi/libetrv/libetrv/cli.py", line 76, in
fire.Fire(CLI)
File "/home/pi/venv/libetrv/lib/python3.5/site-packages/fire/core.py", line 127, in Fire
component_trace = _Fire(component, args, context, name)
File "/home/pi/venv/libetrv/lib/python3.5/site-packages/fire/core.py", line 366, in _Fire
component, remaining_args)
File "/home/pi/venv/libetrv/lib/python3.5/site-packages/fire/core.py", line 542, in _CallCallable
result = fn(*varargs, **kwargs)
File "/home/pi/libetrv/libetrv/cli.py", line 22, in scan
for device in eTRVDevice.scan(timeout):
File "/home/pi/libetrv/libetrv/device.py", line 37, in scan
devices = btle.Scanner().scan(timeout)
File "/home/pi/venv/libetrv/lib/python3.5/site-packages/bluepy/btle.py", lin e 852, in scan
self.start(passive=passive)
File "/home/pi/venv/libetrv/lib/python3.5/site-packages/bluepy/btle.py", lin e 797, in start
self._mgmtCmd(self._cmd()+"end")
File "/home/pi/venv/libetrv/lib/python3.5/site-packages/bluepy/btle.py", lin e 312, in _mgmtCmd
raise BTLEManagementError("Failed to execute management command '%s'" % (c md), rsp)
bluepy.btle.BTLEManagementError: Failed to execute management command 'scanend ' (code: 11, error: Rejected)

Can you help ?

[AdamStrojek]

Hi,
It sounds like you do not have sufficient permissions to perform this action. Start this as root or follow guide in README

[minscof]

Thanks for your answer, but I already ran the command as root.

So I searched on google and I find this post with the same error, the proposed fix was to add "passive=True" in the btle.Scanner().scan(timeout).
I tried, and the error disapperead but the trv has not be found.
Is there something else to do to detect it ?

[minscof]

I increase the timeout value and I stop another processus that was using the bluetooth dongle, and it works now.

I close the issue

[AdamStrojek]

I have also noticed that only one device can access Bluetooth, this is a common problem and I do not know any solution for that.