Device disconnected error in example_ble_1.py

[NoahRosa]

Hello,

I was trying to run the first example using Python 3.5.2 on a Linux Mint system to communicate with the ST-WB55 and X-NUCLEO-IKS01A3 running the FP-SNS-MOTENVWB1 function pack.

The only modification I did to the code of the example was incrementing the discovery time from 5 to 20 seconds.

Here's the execution:

$ sudo python3 example_ble_1.py 

##################
# BlueST Example #
##################

Scanning Bluetooth devices...

Discovery started.
New device discovered: WBMEMS.
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/blue_st_sdk/manager.py", line 313, in discover
    self._scanner.scan(timeout_s)
  File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 854, in scan
    self.stop()
  File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 803, in stop
    self._mgmtCmd(self._cmd()+"end")
  File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 309, in _mgmtCmd
    rsp = self._waitResp('mgmt')
  File "/usr/local/lib/python3.5/dist-packages/bluepy/btle.py", line 362, in _waitResp
    raise BTLEDisconnectError("Device disconnected", resp)
bluepy.btle.BTLEDisconnectError: Device disconnected

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "example_ble_1.py", line 312, in <module>
    main(sys.argv[1:])
  File "example_ble_1.py", line 189, in main
    manager.discover(SCANNING_TIME_s)
  File "/usr/local/lib/python3.5/dist-packages/blue_st_sdk/manager.py", line 325, in discover
    raise BlueSTInvalidOperationException(msg)
blue_st_sdk.utils.blue_st_exceptions.BlueSTInvalidOperationException: 
Bluetooth scanning requires root privilege, so please run the script with "sudo".

The same happens also with the second example.

Do you know what causes the device to disconnect?

Thanks, Noah

[fraratto]

Hi @NoahRosa,

I'm facing the same problem (in 2024 sigh), did you find a workaround?

[NoahRosa]

Hi @fraratto,

Unfortunately since the time I posted this issue I changed company so I no longer have access to what I developed using this product. I remember in the end I made it work with a STM32MP1 as a host device, but I'm not sure if I had to change anything in the library or if it just worked changing the host platform.

I'm sorry for not being more helpful

[fraratto]

No problem. Thanks for the reply :)