Disconnected: 0 BLEHci.remote_user_terminated_connection [using pc_ble_driver_py]

[voldemort]

Hello,

I am using the nordic nRF52840-DK and trying to connect to a nRF52840-Dongle and sending/receiving data to custom services and characteristics using pc_ble_driver_py. I modified the heart rate collector.

But the problem is that when I am connected to the Dongle the connection last 25 to 30 secondes and I receive a message : "Disconnected: 0 BLEHci.remote_user_terminated_connection" and the error message is : "line 477, in write_req attr_handle = self.db_conns[conn_handle].get_char_value_handle(uuid) KeyError: 0". However, when I use the nRF connect mobile/PC version I don't have this problem so I think it is a problem with my code. I check it out if there is some time out equal to like 25_30 secondes but I didn't find any solution.

Could someone help me please to find some solution.

Thanks in advance.

Cordially

Joe

[Kenneth]

Disconnected: 0 BLEHci.remote_user_terminated_connectio

This means that  sd_ble_gap_disconnect() was called on the peer, with the reason BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION. If you can debug your peer you should be able to find where this is called.

Kenneth

[voldemort]

Hello,

I edited the function connect() and I added a tag = 1 = CFG_TAG (the macro in the line number 33), I don't have anymore the problem BLEHci.remote_user_terminated_connection neither the errors.

However, after like 250~253 secondes the connection will stop and I receive the message below :

---> Disconnected: 0 BLEHci.conn_interval_unacceptable

Does anyone have any solution?

Thanks in advance.

Joe

[voldemort]

I have issues exporting data with wire shark, I have found a way to get them on a txt file. you will find it in the attachments.

Thanks

blinky_sniffer.txt

[voldemort]

Wireshark crash everytime I want to save the log. However, I found a way to get the log in a text file and if you prefer I could save them in a CSV file. In the text file which I shared, you find the " Control Opcode: LL_TERMINATE_IND" at the line number 140758.

[Kenneth]

Please try to make the pcapng file work. Maybe check that you stop sniffing before saving, try a restart of PC and wireshark etc.

Kenneth

[voldemort]

Hello Kenneth,

I tried to solve the crash problem by installing wireshark on different PCs and I followed step by step as it mentionned in this link https://infocenter.nordicsemi.com/pdf/nRF_Sniffer_BLE_UG_v3.2.pdfhttps://infocenter.nordicsemi.com/pdf/nRF_Sniffer_BLE_UG_v3.2.pdf .

But everytime I want to save log,  wireshark crash, I  have seen that this is a bug 14631 with Qt and there is no update since 4 years to this: https://devzone.nordicsemi.com/f/nordic-q-a/15429/nrf-sniffer-crash-can-be-fixedhttps://devzone.nordicsemi.com/f/nordic-q-a/15429/nrf-sniffer-crash-can-be-fixed .

when I try to click on file save, the buttons are not enabled and when I click on the red stop icon wireshark crash and exit the app.

Could you perhaps try to use my python code and sniff if your sniffer works well.

[voldemort]

Hello Kenneth,

I finally succeeded to get a pcapng file. In the line number 2838, you will find that I am able to connect to the blinky dongle. after that I am able to send ON/OFF and receive the state of the led every 3 secondes. and after like 200 secondes, the blinky dongle will disconnect and the python script will show me "Disconnected: 0 BLEHci.conn_interval_unacceptable" and at the line number 17172 in pcapng file you will see "control opcode: LL_TERMINATE_IND".

Thanks

blinky_sniff.pcapng

[Kenneth]

I really suspect the real problem here are the unhandled connection parameter update requests:

Can you look into this reply:
https://devzone.nordicsemi.com/f/nordic-q-a/73685/modify-pc-ble-driver-example-for-nordic-uart-service/303474#303474

Kenneth

[voldemort]

Hello,

We are going to investigate in that again, but you think they might be some unhandled connection parameter update requests in your example code (from SDK ble_blinky_app )?

And since it is working correctly with your nRF connect application, is there a specific reason we missed that makes you not suspect the python librairy pc-ble-driver-py?

I will share a pcapng file using nrfconnect and I have the same info: "Connection Parameter Update Request" at line 8482.

Thanks

blinky_with_nrfconnect.pcapng

[Kenneth]

I can see the nrf connect app reply with an connection parameter update response:

So is is the handling of the request that is missing here.

Kenneth

[voldemort]

Hello,

yes indeed, I saw this too. Therefore, could you please tell us wich function schould we use according to the python script in the attachments so I could handle the request.

Thanks

[Kenneth]

I am not able to look into the details here, but I do believe that the answer I linked here show the steps you need to perform:

https://devzone.nordicsemi.com/f/nordic-q-a/73685/modify-pc-ble-driver-example-for-nordic-uart-service/303474#303474