Hello,
I'm using a nRF52 DK to test BLE communication with another microcontroller. What I need to test is the nRF52 pairing with another brand microcontroller, send a data stream and close the connection.
Could you please tell me which example from the Bluetooth samples list I can use for starting?
Thanks for your attention.
Regards,
The Bluetooth: Central / Heart-rate Monitor sample should be a good start.
Hello haakonsh,
Thank you very much. I've reviewed this example and it is supposed to connect with the first device with an strong signal. Is there a way to force the board to connect with the device with a given MAC address?
Why is it necessary to comment k_free() and k_sem_give()? When I try connecting to an ESP32 the test still fails:
*** Booting Zephyr OS build v3.2.99-ncs2 *** bt_conn_auth_cb_register bt_conn_auth_info_cb_register err: 0 bt_enable err: 0 Bluetooth initialized uart_init scan_init Address filter added 60:55:F9:F5:29:D2 (public) Scan module initialized bt_nus_client_init NUS Client module initialized Starting Bluetooth Central UART example scan err: 0 Scanning Scanning successfully started Failed to send data over BLE connection(err -128) NUS send timeout connected conn_err: 0 Connected: 60:55:F9:F5:29:D2 (public) Failed to send data over BLE connection(err -128) NUS send timeout
The ESP32 already has a UUID which allows sending strings from a mobile application. Is there something particular to nRF52 in the implementation of NUS?
Moreover, could you please explain me how the 'pairing_failed' function is called? As it is declared as a callback function it is not clear for me under which situation it is launched.
You will get a code assert if you call k_free() on a pointer that has not been allocated from heap, and k_sem_give() is redundant as you are not using k_sem_take().
msu said:The ESP32 already has a UUID which allows sending strings from a mobile application. Is there something particular to nRF52 in the implementation of NUS?
You need to implement your own GATT Client which matches the GATT server on your ESP32. The NUS client will only work with the NUS service: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/bluetooth_services/services/nus.html
You may be able to use the existing NUS client as a starting point and change out the UUIDs to match the UUIDs used by the ESP.
msu said:Moreover, could you please explain me how the 'pairing_failed' function is called? As it is declared as a callback function it is not clear for me under which situation it is launched.
The pairing is handled by the Zephyr Bluetooth host and it will invoke the pairing failed or pairing success callback depending on the outcome.
Are you still getting the pairing error? If so, is there a long (i.e. several seconds) delay before the pairing failed is called?
You may be able to use the existing NUS client as a starting point and change out the UUIDs to match the UUIDs used by the ESP.
In the project I've sent the UUIDs were already changed :
/** @brief UUID of the NUS Service. **/ #define BT_UUID_NUS_VAL \ BT_UUID_128_ENCODE(0x0000FFFF, 0x0000, 0x1000, 0x8000, 0x00805F9B34FB) /** @brief UUID of the TX Characteristic. **/ #define BT_UUID_NUS_TX_VAL \ BT_UUID_128_ENCODE(0x0000FF01, 0x0000, 0x1000, 0x8000, 0x00805F9B34FB) /** @brief UUID of the RX Characteristic. **/ #define BT_UUID_NUS_RX_VAL \ BT_UUID_128_ENCODE(0x0000FF02, 0x0000, 0x1000, 0x8000, 0x00805F9B34FB)
Are you still getting the pairing error? If so, is there a long (i.e. several seconds) delay before the pairing failed is called?
Yes, it still fails after several seconds (31 send failed tries). Below the terminal output:
Starting Bluetooth Central UART example scan err: 0 Scanning Scanning successfully started Failed to send data over BLE connection(err -128) NUS send timeout connected conn_err: 0 Connected: 60:55:F9:F5:29:D2 (public) Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Failed to send data over BLE connection(err -128) NUS send timeout Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9 Service discovery completed
msu said:In the project I've sent the UUIDs were already changed :
The NUS client is implemented in the SDK tree, so the changes you made were not included in the project you shared.
msu said:Yes, it still fails after several seconds (31 send failed tries). Below the terminal output:
The Service discovery callback is invoked almost immediately after the connection is established, so I suspect the pairing process is interfering with the discovery procedure in your case.
Please build your project with the following settings to print the services and characteristics found in the discovery procedure:
CONFIG_LOG=y CONFIG_USE_SEGGER_RTT=y CONFIG_LOG_BACKEND_RTT=y CONFIG_LOG_BACKEND_UART=y CONFIG_LOG_PRINTK=n CONFIG_BT_DEBUG_LOG=y CONFIG_BT_GATT_DM_DATA_PRINT=y
Here is the log I got for comparison:
Starting Bluetooth Central UART example
Scanning successfully started
Failed to send data over BLE connection(err -128)
[00:00:00.016,296] <inf> fs_nvs: nvs_mount: 6 Sectors of 4096 bytes
[00:00:00.016,326] <inf> fs_nvs: nvs_mount: alloc wra: 0, fb8
[00:00:00.016,326] <inf> fs_nvs: nvs_mount: data wra: 0, 88
[00:00:00.016,510] <inf> bt_sdc_hci_driver: hci_driver_open: SoftDevice Controller build revision:
d8 0c 2d 2f 36 ae e2 5c 80 26 80 4c 3f 4d 16 53 |..-/6..\ .&.L?M.S
50 96 c7 73 |P..s
[00:00:00.020,233] <inf> bt_hci_core: hci_vs_init: HW Platform: Nordic Semiconductor (0x0002)
[00:00:00.020,263] <inf> bt_hci_core: hci_vs_init: HW Variant: nRF52x (0x0002)
[00:00:00.020,294] <inf> bt_hci_core: hci_vs_init: Firmware: Standard Bluetooth controller (0x00) Version 216.11532 Build 3803067951
[00:00:00.020,935] <inf> bt_hci_core: bt_init: No ID address. App must call settings_load()
[00:00:00.024,353] <inf> central_uart: main: Bluetooth initialized
[00:00:00.025,329] <inf> bt_hci_core: bt_dev_show_info: Identity: C4:A1:E3:04:97:3B (random)
[00:00:00.025,360] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.3 (0x0c) revision 0x124b, manufacturer 0x0059
[00:00:00.025,390] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.3 (0x0c) subver 0x124b
[00:00:00.033,874] <inf> central_uart: scan_init: Scan module initialized
[00:00:00.039,367] <inf> central_uart: nus_client_init: NUS Client module initialized
[00:00:00.050,048] <inf> central_uart: main: Scanning successfully started
[00:00:00.054,962] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:00.061,187] <wrn> central_uart: main: NUS send timeout
connected conn_err: 0
Failed to send data over BLE connection(err -128)
[00:00:00.430,145] <inf> central_uart: scan_filter_match: Filters matched. Address: E0:73:95:EE:95:5F (random) connectable: 1
[00:00:00.433,166] <inf> central_uart: scan_filter_match: Filters matched. Address: E0:73:95:EE:95:5F (random) connectable: 0
[00:00:00.433,197] <wrn> central_uart: scan_connecting_error: Connecting failed
[00:00:00.534,973] <inf> central_uart: connected: Connected: E0:73:95:EE:95:5F (random)
[00:00:00.534,973] <wrn> central_uart: connected: Sending pairing req.
[00:00:00.932,800] <inf> central_uart: security_changed: Security changed: E0:73:95:EE:95:5F (random) level 2
[00:00:01.061,492] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:01.067,596] <wrn> central_uart: main: NUS send timeout
Service discovery completed
ATT[1]: UUID: 0x2803 Handle: 0x0011 Value:
Characteristic: 0x6e400003-b5a3-f393-e0a9-e50e24dcca9e Properties: 0x0010
ATT[2]: UUID: 0x6e400003-b5a3-f393-e0a9-e50e24dcca9e Handle: 0x0012 Value:
ATT[3]: UUID: 0x2902 Handle: 0x0013 Value:
CCCD
ATT[4]: UUID: 0x2803 Handle: 0x0014 Value:
Characteristic: 0x6e400002-b5a3-f393-e0a9-e50e24dcca9e Properties: 0x000C
ATT[5]: UUID: 0x6e400002-b5a3-f393-e0a9-e50e24dcca9e Handle: 0x0015 Value:
[00:00:01.882,415] <inf> central_uart: discovery_complete: Service discovery completed
The NUS client is implemented in the SDK tree, so the changes you made were not included in the project you shared.
But are the changes included in the project in my computer?
Below the log I got:
*** Booting Zephyr OS build v3.2.99-ncs2 ***
bt_conn_auth_cb_register
bt_conn_auth_info_cb_register err: 0
bt_enable err: 0
Bluetooth initialized
uart_init
scan_init
Address filter added 60:55:F9:F5:29:D2 (public)
Scan module initialized
bt_nus_client_init
NUS Client module initialized
Starting Bluetooth Central UART example
scan err: 0
Scanning
Scanning successfully started
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:00.017,456] <inf> fs_nvs: nvs_mount: 6 Sectors of 4096 bytes
[00:00:00.017,486] <inf> fs_nvs: nvs_mount: alloc wra: 0, fe8
[00:00:00.017,517] <inf> fs_nvs: nvs_mount: data wra: 0, 0
[00:00:00.017,669] <inf> bt_sdc_hci_driver: hci_driver_open: SoftDevice Controller build revision:
d8 0c 2d 2f 36 ae e2 5c 80 26 80 4c 3f 4d 16 53 |..-/6..\ .&.L?M.S
50 96 c7 73 |P..s
[00:00:00.021,026] <inf> bt_hci_core: hci_vs_init: HW Platform: Nordic Semiconductor (0x0002)
[00:00:00.021,057] <inf> bt_hci_core: hci_vs_init: HW Variant: nRF52x (0x0002)
[00:00:00.021,087] <inf> bt_hci_core: hci_vs_init: Firmware: Standard Bluetooth controller (0x00) Version 216.11532 Build 3803067951
[00:00:00.021,667] <inf> bt_hci_core: bt_init: No ID address. App must call settings_load()
[00:00:00.025,177] <inf> central_uart: main: Bluetooth initialized
[00:00:00.025,817] <inf> bt_hci_core: bt_dev_show_info: Identity: D7:C8:04connected conn_err: 0
Connected: 60:55:F9:F5:29:D2 (public)
:2D:97:BA (random)
[00:00:00.025,848] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.3 (0x0c) revision 0x124b, manufacturer 0x0059
[00:00:00.025,909] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.3 (0x0c) subver 0x124b
[00:00:00.034,240] <inf> central_uart: scan_init: Scan module initialized
[00:00:00.039,733] <inf> central_uart: nus_client_init: NUS Client module initialized
[00:00:00.052,795] <inf> central_uart: main: Scanning successfully started
[00:00:00.058,654] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:00.064,880] <wrn> central_uart: main: NUS send timeout
[00:00:00.117,584] <inf> central_uart: scan_filter_match: Filters matched. Address: 60:55:F9:F5:29:D2 (public) connectable: 1
[00:00:00.120,239] <inf> central_uart: scan_filter_match: Filters matched. Address: 60:55:F9:F5:29:D2 (public) connectable: 0
[00:00:00.120,269] <wrn> central_uart: scan_connecting_error: Connecting failed
[00:00:00.287,994] <inf> central_uart: connected: Connected: 60:55:F9:F5:29:D2 (public)
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:00.586,059] <inf> central_uart: exchange_func: MTU exchange done
[00:00:01.069,122] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:01.075,317] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:02.079,681] <wrn> central_uart: main: Failed to senreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
d data over BLE connection(err -128)
[00:00:02.086,212] <wrn> central_uart: main: NUS send timeout
[00:00:03.090,545] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:03.096,740] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:04.101,104] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:04.107,330] <wrn> central_uart: main: NUS send timeout
[00:00:05.111,602] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:05.117,797] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:06.122,100] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:06.128,326] <wrn> central_uart: main: NUS send timeout
[00:00:07.132,598] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:07.139,129] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:08.143,524] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:08.149,719] <wrn> central_uart: main: NUS send timeout
[00:00:09.153,961] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:09.160,156] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:10.164,459] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:10.170,654] <wrn> central_uart: main: NUS send timeout
[00:00:11.174,957] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:11.181,182] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:12.185,821] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:12.191,925] <wrn> central_uart: main: NUS send timeout
[00:00:13.196,258] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:13.202,484] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:14.206,756] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:14.212,951] <wrn> central_uart: main: NUS send timeout
[00:00:15.217,193] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:15.223,388] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:16.227,722] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:16.233,947] <wrn> central_uart: main: NUS send timeout
[00:00:17.238,372] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:17.244,598] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:18.248,870] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:18.255,065] <wrn> central_uart: main: NUS send timeout
[00:00:19.259,307] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:19.265,533] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:20.269,866] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:20.276,092] <wrn> central_uart: main: NUS send timeout
[00:00:21.280,303] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:21.286,743] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:22.291,107] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:22.297,302] <wrn> central_uart: main: NUS send timeout
[00:00:23.301,696] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:23.307,891] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:24.312,286] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:24.318,481] <wrn> central_uart: main: NUS send timeout
[00:00:25.322,784] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:25.329,010] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:26.333,343] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:26.339,843] <wrn> central_uart: main: NUS send timeout
[00:00:27.344,207] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:27.350,433] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:28.354,766] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:28.360,992] <wrn> central_uart: main: NUS send timeout
[00:00:29.365,264] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:29.371,490] <wrn> central_uart: main: NUS send timeout
Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
Service discovery completed
ATT[1]: UUID: 0x2803 Handle: 0x0029 Value:
Characteristic: 0xff01 Properties: 0x0008
ATT[2]: UUID: 0xff01 Handle: 0x002A Value:
ATT[3]: UUID: 0x2803 Handle: 0x002B Value:
Characteristic: 0xff02 Properties: 0x0012
ATT[4]: UUID: 0xff02 Handle: 0x002C Value:
ATT[5]: UUID: 0x2902 Handle: 0x002D Value:
CCCD
[00:00:30.293,670] <err> bt_smp: smp_timeout: SMP Timeout
[00:00:30.294,281] <wrn> central_uart: security_changed: Security failed: 60:55:F9:F5:29:D2 (public) level 1 err 9
[00:00:30.294,677] <wrn> central_uart: pairing_failed: Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9
[00:00:30.375,762] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:30.381,958] <wrn> central_uart: main: NUS send timeout
[00:00:30.936,035] <inf> central_uart: discovery_complete: Service discovery completed
[00:00:30.978,515] <err> nus_c: bt_nus_handles_assign: Missing NUS TX CCC in characteristic.
[00:00:31.436,035] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:32.436,065] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:33.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:34.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:35.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:36.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:37.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:38.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:39.536,010] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:40.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:41.536,071] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:42.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:43.586,029] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:44.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:45.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:46.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:47.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:48.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:49.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:50.536,010] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:51.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:52.585,998] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
The NUS client is implemented in the SDK tree, so the changes you made were not included in the project you shared.
But are the changes included in the project in my computer?
Below the log I got:
*** Booting Zephyr OS build v3.2.99-ncs2 ***
bt_conn_auth_cb_register
bt_conn_auth_info_cb_register err: 0
bt_enable err: 0
Bluetooth initialized
uart_init
scan_init
Address filter added 60:55:F9:F5:29:D2 (public)
Scan module initialized
bt_nus_client_init
NUS Client module initialized
Starting Bluetooth Central UART example
scan err: 0
Scanning
Scanning successfully started
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:00.017,456] <inf> fs_nvs: nvs_mount: 6 Sectors of 4096 bytes
[00:00:00.017,486] <inf> fs_nvs: nvs_mount: alloc wra: 0, fe8
[00:00:00.017,517] <inf> fs_nvs: nvs_mount: data wra: 0, 0
[00:00:00.017,669] <inf> bt_sdc_hci_driver: hci_driver_open: SoftDevice Controller build revision:
d8 0c 2d 2f 36 ae e2 5c 80 26 80 4c 3f 4d 16 53 |..-/6..\ .&.L?M.S
50 96 c7 73 |P..s
[00:00:00.021,026] <inf> bt_hci_core: hci_vs_init: HW Platform: Nordic Semiconductor (0x0002)
[00:00:00.021,057] <inf> bt_hci_core: hci_vs_init: HW Variant: nRF52x (0x0002)
[00:00:00.021,087] <inf> bt_hci_core: hci_vs_init: Firmware: Standard Bluetooth controller (0x00) Version 216.11532 Build 3803067951
[00:00:00.021,667] <inf> bt_hci_core: bt_init: No ID address. App must call settings_load()
[00:00:00.025,177] <inf> central_uart: main: Bluetooth initialized
[00:00:00.025,817] <inf> bt_hci_core: bt_dev_show_info: Identity: D7:C8:04connected conn_err: 0
Connected: 60:55:F9:F5:29:D2 (public)
:2D:97:BA (random)
[00:00:00.025,848] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.3 (0x0c) revision 0x124b, manufacturer 0x0059
[00:00:00.025,909] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.3 (0x0c) subver 0x124b
[00:00:00.034,240] <inf> central_uart: scan_init: Scan module initialized
[00:00:00.039,733] <inf> central_uart: nus_client_init: NUS Client module initialized
[00:00:00.052,795] <inf> central_uart: main: Scanning successfully started
[00:00:00.058,654] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:00.064,880] <wrn> central_uart: main: NUS send timeout
[00:00:00.117,584] <inf> central_uart: scan_filter_match: Filters matched. Address: 60:55:F9:F5:29:D2 (public) connectable: 1
[00:00:00.120,239] <inf> central_uart: scan_filter_match: Filters matched. Address: 60:55:F9:F5:29:D2 (public) connectable: 0
[00:00:00.120,269] <wrn> central_uart: scan_connecting_error: Connecting failed
[00:00:00.287,994] <inf> central_uart: connected: Connected: 60:55:F9:F5:29:D2 (public)
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:00.586,059] <inf> central_uart: exchange_func: MTU exchange done
[00:00:01.069,122] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:01.075,317] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:02.079,681] <wrn> central_uart: main: Failed to senreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
d data over BLE connection(err -128)
[00:00:02.086,212] <wrn> central_uart: main: NUS send timeout
[00:00:03.090,545] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:03.096,740] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:04.101,104] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:04.107,330] <wrn> central_uart: main: NUS send timeout
[00:00:05.111,602] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:05.117,797] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:06.122,100] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:06.128,326] <wrn> central_uart: main: NUS send timeout
[00:00:07.132,598] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:07.139,129] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:08.143,524] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:08.149,719] <wrn> central_uart: main: NUS send timeout
[00:00:09.153,961] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:09.160,156] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:10.164,459] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:10.170,654] <wrn> central_uart: main: NUS send timeout
[00:00:11.174,957] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:11.181,182] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:12.185,821] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:12.191,925] <wrn> central_uart: main: NUS send timeout
[00:00:13.196,258] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:13.202,484] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:14.206,756] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:14.212,951] <wrn> central_uart: main: NUS send timeout
[00:00:15.217,193] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:15.223,388] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:16.227,722] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:16.233,947] <wrn> central_uart: main: NUS send timeout
[00:00:17.238,372] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:17.244,598] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:18.248,870] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:18.255,065] <wrn> central_uart: main: NUS send timeout
[00:00:19.259,307] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:19.265,533] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:20.269,866] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:20.276,092] <wrn> central_uart: main: NUS send timeout
[00:00:21.280,303] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:21.286,743] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:22.291,107] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:22.297,302] <wrn> central_uart: main: NUS send timeout
[00:00:23.301,696] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:23.307,891] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:24.312,286] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:24.318,481] <wrn> central_uart: main: NUS send timeout
[00:00:25.322,784] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:25.329,010] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:26.333,343] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:26.339,843] <wrn> central_uart: main: NUS send timeout
[00:00:27.344,207] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:27.350,433] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:28.354,766] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:28.360,992] <wrn> central_uart: main: NUS send timeout
[00:00:29.365,264] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:29.371,490] <wrn> central_uart: main: NUS send timeout
Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
Service discovery completed
ATT[1]: UUID: 0x2803 Handle: 0x0029 Value:
Characteristic: 0xff01 Properties: 0x0008
ATT[2]: UUID: 0xff01 Handle: 0x002A Value:
ATT[3]: UUID: 0x2803 Handle: 0x002B Value:
Characteristic: 0xff02 Properties: 0x0012
ATT[4]: UUID: 0xff02 Handle: 0x002C Value:
ATT[5]: UUID: 0x2902 Handle: 0x002D Value:
CCCD
[00:00:30.293,670] <err> bt_smp: smp_timeout: SMP Timeout
[00:00:30.294,281] <wrn> central_uart: security_changed: Security failed: 60:55:F9:F5:29:D2 (public) level 1 err 9
[00:00:30.294,677] <wrn> central_uart: pairing_failed: Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9
[00:00:30.375,762] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:30.381,958] <wrn> central_uart: main: NUS send timeout
[00:00:30.936,035] <inf> central_uart: discovery_complete: Service discovery completed
[00:00:30.978,515] <err> nus_c: bt_nus_handles_assign: Missing NUS TX CCC in characteristic.
[00:00:31.436,035] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:32.436,065] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:33.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:34.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:35.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:36.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:37.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:38.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:39.536,010] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:40.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:41.536,071] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:42.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:43.586,029] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:44.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:45.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:46.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:47.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:48.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:49.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:50.536,010] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:51.486,022] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
[00:00:52.585,998] <wrn> central_uart: ble_data_sent: ATT error code: 0x01
Now I can see the pairing is failing due to a timeout. It is probably blocked by the service discovery.
The ESP32 uses 16-bit services not 128-bit vendor specific services as NUS does. This means you need to change the UUID declarations from 128-bits to 16-bits uuids with BT_UUID_DECLARE_16().
But are the changes included in the project in my computer?
Yes, in your local NCS copy.
This means you need to change the UUID declarations from 128-bits to 16-bits uuids with BT_UUID_DECLARE_16().
I have just made this change and now I have errors like this in many lines:
error: macro "BT_UUID_INIT_16" passed 2 arguments, but takes just 1 161 | gatt_desc = bt_gatt_dm_desc_by_uuid(dm, gatt_chrc, BT_UUID_NUS_RX);
Do I have to replace functions?
I solve this problem by replacing:
/** @brief UUID of the NUS Service. **/ #define BT_UUID_NUS_VAL \ BT_UUID_16_ENCODE(0xFFFF) /** @brief UUID of the TX Characteristic. **/ #define BT_UUID_NUS_TX_VAL \ BT_UUID_16_ENCODE(0xFF01) /** @brief UUID of the RX Characteristic. **/ #define BT_UUID_NUS_RX_VAL \ BT_UUID_16_ENCODE(0xFF02)
by:
/** @brief UUID of the NUS Service. **/ #define BT_UUID_NUS_VAL \ (BT_UUID_16_ENCODE(0xFFFF)) /** @brief UUID of the TX Characteristic. **/ #define BT_UUID_NUS_TX_VAL \ (BT_UUID_16_ENCODE(0xFF01)) /** @brief UUID of the RX Characteristic. **/ #define BT_UUID_NUS_RX_VAL \ (BT_UUID_16_ENCODE(0xFF02))
After having flashed the nRF52 the data is not sent yet and I don't see anymore the UUID in the log (the discovery service is not found). Below the log output:
*** Booting Zephyr OS build v3.2.99-ncs2 ***
bt_conn_auth_cb_register
bt_conn_auth_info_cb_register err: 0
bt_enable err: 0
Bluetooth initialized
uart_init
scan_init
Address filter added 60:55:F9:F5:29:D2 (public)
Scan module initialized
bt_nus_client_init
NUS Client module initialized
Starting Bluetooth Central UART example
scan err: 0
Scanning
Scanning successfully started
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:00.017,303] <inf> fs_nvs: nvs_mount: 6 Sectors of 4096 bytes
[00:00:00.017,333] <inf> fs_nvs: nvs_mount: alloc wra: 0, fe8
[00:00:00.017,364] <inf> fs_nvs: nvs_mount: data wra: 0, 0
[00:00:00.017,486] <inf> bt_sdc_hci_driver: hci_driver_open: SoftDevice Controller build revision:
d8 0c 2d 2f 36 ae e2 5c 80 26 80 4c 3f 4d 16 53 |..-/6..\ .&.L?M.S
50 96 c7 73 |P..s
[00:00:00.020,843] <inf> bt_hci_core: hci_vs_init: HW Platform: Nordic Semiconductor (0x0002)
[00:00:00.020,874] <inf> bt_hci_core: hci_vs_init: HW Variant: nRF52x (0x0002)
[00:00:00.020,904] <inf> bt_hci_core: hci_vs_init: Firmware: Standard Bluetooth controller (0x00) Version 216.11532 Build 3803067951
[00:00:00.021,453] <inf> connected conn_err: 0
Connected: 60:55:F9:F5:29:D2 (public)
bt_hci_core: bt_init: No ID address. App must call settings_load()
[00:00:00.024,963] <inf> central_uart: main: Bluetooth initialized
[00:00:00.025,604] <inf> bt_hci_core: bt_dev_show_info: Identity: D7:C8:04:2D:97:BA (random)
[00:00:00.025,634] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.3 (0x0c) revision 0x124b, manufacturer 0x0059
[00:00:00.025,695] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.3 (0x0c) subver 0x124b
[00:00:00.034,118] <inf> central_uart: scan_init: Scan module initialized
[00:00:00.039,611] <inf> central_uart: nus_client_init: NUS Client module initialized
[00:00:00.052,642] <inf> central_uart: main: Scanning successfully started
[00:00:00.058,929] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:00.065,124] <wrn> central_uart: main: NUS send timeout
[00:00:00.069,824] <inf> central_uart: scan_filter_match: Filters matched. Address: 60:55:F9:F5:29:D2 (public) connectable: 1
[00:00:00.072,082] <inf> central_uart: scan_filter_match: Filters matched. Address: 60:55:F9:F5:29:D2 (public) connectable: 0
[00:00:00.072,113] <wrn> central_uart: scan_connecting_error: Connecting failed
[00:00:00.241,516] <inf> central_uart: connected: Connected: 60:55:F9:F5:29:D2 (public)
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:00.539,489] <inf> central_uart: exchange_func: MTU exchange done
[00:00:01.069,519] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:01.075,714] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:02.080,017] <wrn> central_uart: main: Failed to senreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
d data over BLE connection(err -128)
[00:00:02.086,242] <wrn> central_uart: main: NUS send timeout
[00:00:03.090,759] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:03.096,954] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:04.101,257] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:04.107,482] <wrn> central_uart: main: NUS send timeout
[00:00:05.111,785] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:05.118,011] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:06.122,375] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:06.128,601] <wrn> central_uart: main: NUS send timeout
[00:00:07.132,904] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:07.139,221] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:08.143,402] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:08.149,627] <wrn> central_uart: main: NUS send timeout
[00:00:09.153,900] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:09.160,125] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:10.164,520] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:10.170,745] <wrn> central_uart: main: NUS send timeout
[00:00:11.175,048] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:11.181,274] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:12.185,638] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:12.192,108] <wrn> central_uart: main: NUS send timeout
[00:00:13.196,350] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:13.202,575] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:14.206,970] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:14.213,195] <wrn> central_uart: main: NUS send timeout
[00:00:15.217,468] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:15.223,693] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:16.227,996] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:16.234,222] <wrn> central_uart: main: NUS send timeout
[00:00:17.238,525] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:17.244,995] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:18.249,267] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:18.255,462] <wrn> central_uart: main: NUS send timeout
[00:00:19.259,704] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:19.265,899] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:20.270,263] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:20.276,489] <wrn> central_uart: main: NUS send timeout
[00:00:21.280,670] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:21.286,895] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:22.291,442] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:22.297,668] <wrn> central_uart: main: NUS send timeout
[00:00:23.301,940] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:23.308,166] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:24.312,408] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:24.318,634] <wrn> central_uart: main: NUS send timeout
[00:00:25.322,967] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:25.329,193] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:26.333,435] <wrn> central_uart: main: Failed to senreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
d data over BLE connection(err -128)
[00:00:26.339,965] <wrn> central_uart: main: NUS send timeout
[00:00:27.344,238] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:27.350,433] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:28.354,766] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:28.361,022] <wrn> central_uart: main: NUS send timeout
[00:00:29.365,295] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:29.371,551] <wrn> central_uart: main: NUS send timeout
Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9
Service not found
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:30.247,192] <err> bt_smp: smp_timeout: SMP Timeout
[00:00:30.247,802] <wrn> central_uart: security_changed: Security failed: 60:55:F9:F5:29:D2 (public) level 1 err 9
[00:00:30.248,168] <wrn> central_uart: pairing_failed: Pairing failed conn: 60:55:F9:F5:29:D2 (public), reason 9
[00:00:30.339,447] <inf> central_uart: discovery_service_not_found: Service not found
[00:00:30.375,793] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:30.382,019] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:31.386,260] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:31.392,517] <wrn> central_uart: main: NUS send timeout
[00:00:32.396,789] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:32.403,015] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:33.407,287] <wrn> central_uart: main: Failed to sendreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
data over BLE connection(err -128)
[00:00:33.413,513] <wrn> central_uart: main: NUS send timeout
[00:00:34.417,907] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:34.424,102] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:35.428,405] <wrn> central_uart: main: Failed to senreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
d data over BLE connection(err -128)
[00:00:35.434,631] <wrn> central_uart: main: NUS send timeout
[00:00:36.439,147] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:36.445,251] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:37.449,523] <wrn> central_uart: main: Failed to sreturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
end data over BLE connection(err -128)
[00:00:37.455,749] <wrn> central_uart: main: NUS send timeout
[00:00:38.460,052] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:38.466,247] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
[00:00:39.470,550] <wrn> central_uart: main: Failed to sereturn ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
nd data over BLE connection(err -128)
[00:00:39.476,745] <wrn> central_uart: main: NUS send timeout
[00:00:40.481,018] <wrn> central_uart: main: Failed to send data over BLE connection(err -128)
[00:00:40.487,243] <wrn> central_uart: main: NUS send timeout
return ENOTCONN
Failed to send data over BLE connection(err -128)
NUS send timeout
Which could be the problem?
Hello Vidar Berg,
Do you have any hint to solve this issue? Thanks for your attention.