Can't connect the SensorTile with Raspberry pi

[Milan127]

Hi,

I want connect my SensorTile box with my Raspberry pi. For this, I use example_ble_1.py, but every time when i try to connect the devices then one of the given errors occur:

guest@raspberrypi:~ $ sudo python3 example_ble_1.py

##################

BlueST Example

##################

Scanning Bluetooth devices...

Discovery started.
New device discovered: TB2 .
Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/blue_st_sdk/manager.py", line 313, in discover
self._scanner.scan(timeout_s)
File "/usr/local/lib/python3.9/dist-packages/bluepy/btle.py", line 854, in scan
self.stop()
File "/usr/local/lib/python3.9/dist-packages/bluepy/btle.py", line 803, in stop
self._mgmtCmd(self._cmd()+"end")
File "/usr/local/lib/python3.9/dist-packages/bluepy/btle.py", line 309, in _mgmtCmd
rsp = self._waitResp('mgmt')
File "/usr/local/lib/python3.9/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 "/home/guest/example_ble_1.py", line 312, in
main(sys.argv[1:])
File "/home/guest/example_ble_1.py", line 189, in main
manager.discover(SCANNING_TIME_s)
File "/usr/local/lib/python3.9/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".

guest@raspberrypi:~ $ sudo python3 example_ble_1.py

##################

BlueST Example

##################

Scanning Bluetooth devices...

Discovery started.
New device discovered: TB2 .
Discovery stopped.

Available Bluetooth devices:

1. TB2 : [c0:50:06:32:19:33]

Select a device to connect to ('0' to quit): 1
Connecting to TB2 ...
Device TB2 disconnected unexpectedly.

Exiting...

Accelerometers

[Federica Bossi]

Hi @Milan127 ,

Welcome to ST Community!

The python implementation of BlueST protocol (BlueST SDK) uses the bluepy BLE stack.

Due to this, one of the limitations of bluepy is that when running a discovery process the already connected devices get disconnected.

You can read about this here: BlueSTSDK_Python

I can suggest you to first disconnect the device and then try to connect to it and see if this mitigates the intrinsic bluepy issue.

[Milan127]

Hi @Federica Bossi,

I don't really get it, how can I disconnect the SensorTilebox when I can't even connect in the first place? Might it be someting else that can cause this problem?

[Milan127]

The Sensortile that I am using is the STEVAL-MKSBOX1V1.