问题
How is it possible to authenticate using Bluez 5.31 and GattTool?
I want to listen on a notification.
I've connected using gatttool -b <addr> -I and I can run the primary command etc.
I sniffed the device and I know that handle 0x0024 is where I will find a notification.
When I try char-write-req 0x0024 0100 I get Error: Characteristic write Request failed: Attribute requires authentication before read/write
So I try sec-level medium and then sec-level high but I still get the same error.
Any ideas?
来源：https://stackoverflow.com/questions/30896386/bluetooth-low-energy-listening-for-notifications-indications-on-raspberry-pi-b