pc_ble_driver_py multiple dongles

[Jacob Portukalian]

Does the python driver support multiple dongles? I have a situation where I want to scan with one dongle and connect to devices with a second dongle. However, the collector object that is just for connecting is receiving advertising scan timeout events from the scanning object. How can this happen unless the BLEDriver or BLEAdapter classes are acting like singletons?

EDIT 1: I am overriding the on_gap_evt_timeout method in my collector, which is a subclass of BLEDriverObserver and BLEAdapterObserver as well as threading.Thread.

In the collector that is only for connecting (no scanning) I still occasionally get BLEGapTimeoutSrc.scan events. Any idea how this could happen?

EDIT 2: I am running instances of my collectors in different threads. Looking at the ble_driver.py I see module variables being used which tells me that it might not be thread safe. Is this module thread safe?

[Jørgen Holmefjord]

Hi,

In theory it should be possible to run multiple dongles, but unfortunately this has not been tested thoroughly yet. Due to this, there could be thread issues.

Best regards,

Jørgen

[Jacob Portukalian]

Thanks Jorgen. Do you have any explanation for why one collector would get callbacks meant for a different collector instance?

[Jacob Portukalian]

I've determined that this is fundamentally impossible with the pc-ble-driver as written. The reason is that callbacks do not contain any information about the adapter used to generate the callback.

[Jacob Portukalian]

Jorgen see my answer below. I've ruled out the possibility of being able to use any of the code to handle more than one dongle.