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BLE, disconnecting from a central
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Please be positive and constructive with your questions and comments.

Re: BLE, disconnecting from a central

by FriehoffT on Thu Jan 13, 2022 11:57 am

I know a little more now.
The querty keyboard I was talking about is a Model KS45B-2 from the manufacturer SEENDA

https://www.amazon.de/seenda-Multi-Devi ... B08RP44ZRZ

I checked with my Android Phone and I checked with the Adafruit LE connect v3.3.2 App that it is a Bluetooth LE keyboard

Interestingly it shows up three times with different Addresses there:
1. C7:BB:0E:4F:71:FD
2. C7:BB:0E:4F:71:FE
3. C7:BB:0E:4F:72:00
Devices_20220113-155150.jpg
Devices_20220113-155150.jpg (79.62 KiB) Viewed 21 times


The ItsyBitsy nRF shows up with F6:11:64:44:8C:0C address.
I will attach screenshots from my Android phone about this

The Seenda Keyboard uses a Nordic Semiconductor Chip with UUID 2A29 / Firmware: 2A26 and a PNP ID: 2A50
It offers DFU Service, Generic Access 1800, Generic Attribute 1801, Battery Service 180F, HID Device 1812 with different Portocols and Reports
a Boot Keyboard Input Report, a Boot Keyboard Output Report and HID Information.
Also here Screenshots from Adafruit LE connect attached to this mail.
InfoPage1_20220113-155727.jpg
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InfoPage2_20220113-155740.jpg
InfoPage2_20220113-155740.jpg (65.2 KiB) Viewed 21 times




It seems when you press one of the three "Bluetooth-Keys" on this Keyboard the current Keyboard HID device "goes away" and the selected Keyboard HID device comes up.
I can see this in Settings Bluetooth on my Windows PC.

Interestingly I can not get into the Info page of the ItsyBitsy Bluetooth Keyboard (Name: MyKey by BBTF) in the Adafruit LE connect app because it "stuck" with Checking updates...
Screenshot attached.
Last edited by FriehoffT on Thu Jan 13, 2022 12:03 pm, edited 1 time in total.

FriehoffT
 
Posts: 55
Joined: Wed Sep 11, 2019 7:30 am

Re: BLE, disconnecting from a central

by FriehoffT on Thu Jan 13, 2022 12:01 pm

More Pictures:
InfoPage3_20220113-155747.jpg
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InfoPage4_20220113-155755.jpg
InfoPage4_20220113-155755.jpg (59.88 KiB) Viewed 21 times


CheckingUpdates_20220113-160833.jpg
CheckingUpdates_20220113-160833.jpg (45.21 KiB) Viewed 21 times

FriehoffT
 
Posts: 55
Joined: Wed Sep 11, 2019 7:30 am

Re: BLE, disconnecting from a central

by FriehoffT on Thu Jan 13, 2022 12:03 pm

More Pictures:

Picture_20220113_155215768.jpg
Picture_20220113_155215768.jpg (940.42 KiB) Viewed 21 times


RawData1_20220113-155312.jpg
RawData1_20220113-155312.jpg (73.4 KiB) Viewed 21 times


RawData2_20220113-155326.jpg
RawData2_20220113-155326.jpg (73.65 KiB) Viewed 21 times

FriehoffT
 
Posts: 55
Joined: Wed Sep 11, 2019 7:30 am

Re: BLE, disconnecting from a central

by FriehoffT on Mon Jan 17, 2022 6:32 am

@danhalbert any feedback after this information is now available?

FriehoffT
 
Posts: 55
Joined: Wed Sep 11, 2019 7:30 am

Re: BLE, disconnecting from a central

by danhalbert on Mon Jan 17, 2022 10:48 pm

I think we need to add something to the API about returning the address for an existing connection. Could you open an issue for this via https://github.com/adafruit/circuitpyth ... new/choose ? We can do something experimental initially, and see if it works for you.

danhalbert
 
Posts: 3171
Joined: Tue Aug 08, 2017 12:37 pm

Please be positive and constructive with your questions and comments.