NRF52840 reprot an error after disconnection

RE: NRF52840 reprot an error after disconnection

Hannibalhz — Wed, 25 Aug 2021 01:22:16 GMT

Dear Kenneth

This suggestion is very useful, I did a test in the office, this problem has been solved, thank you very much for your support.

Best regards

RE: NRF52840 reprot an error after disconnection

Kenneth — Mon, 23 Aug 2021 09:17:03 GMT

Does increasing the connection attempts help?

Try to set CONFIG_BT_SCAN_CONN_ATTEMPTS_COUNT=10

Kenneth

RE: NRF52840 reprot an error after disconnection

Hannibalhz — Fri, 20 Aug 2021 09:56:53 GMT

Dear Kenneth

I tried your suggestion today and changed BT_LE_SCAN_OPT_FILTER_DUPLICATE t to BT_LE_SCAN_OPT_NONE. But it didn’t take effect. It doesn’t seem to solve the problem.Do you have any good suggestions?

Looking forward to your reply.Thanks you.

RE: NRF52840 reprot an error after disconnection

Kenneth — Thu, 19 Aug 2021 12:43:45 GMT

Let me ask a bit internally if someone have a suggestion.

Edit: One thing you can try in the meantime, in scan_init() change from BT_LE_SCAN_OPT_FILTER_DUPLICATE to BT_LE_SCAN_OPT_NONE.

Best regards,
Kenneth

RE: NRF52840 reprot an error after disconnection

Hannibalhz — Thu, 19 Aug 2021 10:17:38 GMT

Dear Kenneth

Today I used two 52840DKs. The burning program was as I described before. I didn’t modify any programs, only the configuration. What I saw seemed to be a problem with DONGLE. As long as DONGLE was powered off and restarted, the mouse and dongle can reconnect. The following is the information printed by RTT after disconnection. The dongle starts to scan, but it seems to enter some abnormal state after the connection fails.

00> [03057248] <inf> ble_scan: Scan started

00> [03057251] <inf> event_manager: e: ble_peer_search_event inactive

00> [03057253] <inf> event_manager: e: ble_peer_search_event active

00> [03057257] <inf> event_manager: e: led_event led_id:1 effect:0x4aa10

00> [03057260] <inf> event_manager: e: led_event led_id:1 effect:0x4aa20

00> [03073621] <inf> ble_scan: Filters matched. F1:7F:A1:3F:AB:CA (random) connectable

00> [03073650] <inf> ble_scan: Connecting done

00> [03092138] <inf> ble_state: Setting TX power to: 0

00> [03092147] <inf> ble_state: TX power returned by command: 0

00> [03092148] <inf> ble_state: Connected to F1:7F:A1:3F:AB:CA (random)

00> [03092161] <inf> event_manager: e: ble_peer_event id=0x20002e48 CONNECTED

00> [03092167] <inf> event_manager: e: led_event led_id:1 effect:0x4aa20

00> [03093567] <inf> ble_state: Disconnected from F1:7F:A1:3F:AB:CA (random) (reason 62)

00> [03093570] <inf> event_manager: e: ble_peer_event id=0x20002e48 DISCONNECTED

00> [03093575] <inf> event_manager: e: led_event led_id:1 effect:0x4aa20

00> [03094081] <wrn> ble_scan: Active scan already disabled

00> [03094091] <inf> ble_scan: Address filter added F1:7F:A1:3F:AB:CA (random)

00> [03094112] <inf> ble_scan: Scan started

00> [03094115] <inf> event_manager: e: ble_peer_search_event inactive

00> [03094117] <inf> event_manager: e: ble_peer_search_event active

00> [03094121] <inf> event_manager: e: led_event led_id:1 effect:0x4aa10

00> [03094124] <inf> event_manager: e: led_event led_id:1 effect:0x4aa20

According to the LOG information, it seems that an abnormality occurred during the last scan.

I have already suggested that they enable Dongle watchdog. May I ask if there is any better suggestion for this issue. Our client is very anxious, so please help analyze it as soon as possible.

Looking forward to your reply.Thanks you.

RE: NRF52840 reprot an error after disconnection

Kenneth — Mon, 16 Aug 2021 11:28:03 GMT

Have they written code to ensure that the dongle will start to scan again when receiving the disconnect event?

Also, the same for the peripheral, does it start to advertise again after disconnect event?

I suspect they may go to sleep on disconnect.

Kenneth

RE: NRF52840 reprot an error after disconnection

Hannibalhz — Fri, 13 Aug 2021 06:08:06 GMT

Dear Kenneth

Our customer once again asked why the connection could not be established again. Could you please give me a little help?

Looking forward to your reply.Thanks you.

RE: NRF52840 reprot an error after disconnection

Hannibalhz — Mon, 09 Aug 2021 02:11:53 GMT

Dear Kenneth

Thank you for your reply! I have a one more question I would like to ask you.Please tell me why the Mouse and the Dongle can't connect again after the error 0x03is generated?Only by restarting the two deveice can the connection be re-established.

Looking forward to your reply~

RE: NRF52840 reprot an error after disconnection

Kenneth — Fri, 06 Aug 2021 10:55:28 GMT

[quote user=""]0x3e[/quote]

This is a common error code also ("failed to establish connection"), it simply means that the central sent a connection request packet, but the connection request packet not received by the peripheral. The packet loss may happen due to interference, it's marginally out of range, other central roles devices trying to scan the peer etc.

So both error codes (disconnect reasons) are normal.

Best regards,
Kenneth