Switch between BLE adapters

[adafruit]

Switch between BLE adapters

[mactabish]

@bedenko any idea for a quick solution to this?

[bedenko]

Well, at least for linux part, this part is hard-coded, so "Adapter1" and "Device1" are static.

Quick fix: change the value Adapter1 to Adapter2
Permanent fix: change the code, to be able to switch between adapters.

P.S.: this line also returns following error:

AttributeError: 'NoneType' object has no attribute 'GetManagedObjects'

[neomanic]

You can use adapters = ble.list_adapters(), then choose the adapter you want from the list using indexing adapter = adapters[-1].

But on a related issue, I wasn't sure that the adapters would always be enumerated in the right order, so I added adapter selection using the MAC of the Bluetooth dongle, as follows.

Add the following patch to the library, which gives you easy access to the BLE adapter address:

diff --git a/Adafruit_BluefruitLE/bluez_dbus/adapter.py b/Adafruit_BluefruitLE/bluez_dbus/adapter.py
index 0d262d2..811c0bc 100644
--- a/Adafruit_BluefruitLE/bluez_dbus/adapter.py
+++ b/Adafruit_BluefruitLE/bluez_dbus/adapter.py
@@ -62,7 +62,13 @@ class BluezAdapter(Adapter):
     def name(self):
         """Return the name of this BLE network adapter."""
         return self._props.Get(_INTERFACE, 'Name')
-
+        
+    @property
+    def address(self):
+        """Return the address of this BLE network adapter."""
+        return self._props.Get(_INTERFACE, 'Address')
+        
+        
     def start_scan(self, timeout_sec=TIMEOUT_SEC):
         """Start scanning for BLE devices with this adapter."""
         self._scan_started.clear()

Then in my initialisation code, I have:

    adapters = ble.list_adapters()
    adapter = None
    if len(adapters) == 1:
        print("Single Bluetooth adapter found (no MAC filtering).")
        adapter = adapters[0]
    if len(adapters) > 1:
        filtered_adapters = [a for a in adapters if a.address == BLUETOOTH_ADAPTER_MAC]
        if len(filtered_adapters) > 0:
            print("Multiple Bluetooth adapters found: filtered by MAC.")
            adapter = filtered_adapters[0]
        else:
            print("Multiple Bluetooth adapters found: MAC filtering failed, using last enumerated adapter.")
            adapter = adapters[-1]
    elif len(adapters) == 0:
        print("No Bluetooth adapter found.")
        return

[dhalbert]

This library has been deprecated. Please update to use this new library:
https://github.com/adafruit/Adafruit_Blinka_bleio
If you continue to have this issue, please open a new issue in that repo.