RE: How to notify the advertising device by pc-ble-driver-py?

zhaoyuan — Mon, 19 Dec 2022 00:39:31 GMT

Hi Elfving,

Sorry for the late reply because I was sick.

Yes, our nRF5340 adopts NUS sample. We want to receive the data from 5340 to pc and collect as well as plot the data synchronously at a speed of 300 kbps. Thus, we use nRF52840 and pc-ble-driver. Would you give us some advice on our plan?

Thank you for your attention.

Regards,

zhaoyuan

RE: How to notify the advertising device by pc-ble-driver-py?

Elfving — Thu, 15 Dec 2022 15:50:06 GMT

[quote user="zhaoyuan"]Have you met this problem?[/quote]

No, I haven't personally.

[quote user="zhaoyuan"] I am not very familiar with BLE.[/quote][quote user="zhaoyuan"] I would be grateful if you could give me some advice[/quote]

In that case I would recommend you to rather work on something a bit newer and easier than pc-ble-driver. The lack of documentation can make it really difficult to work with.

What are you trying to achieve? Maybe the NUS sample has all the features you need?

Regards,

Elfving

RE: How to notify the advertising device by pc-ble-driver-py?

zhaoyuan — Wed, 14 Dec 2022 15:48:20 GMT

Hi Elfving,

It really helps. Thank you for your kindly help! By the way, I try to notify the uart over ble handle but get nothing, which however works in scaning way. Have you met this problem? I am not very familiar with BLE. I would be grateful if you could give me some advice. Here is the logs.

Regards,

zhaoyuan

2022-12-14 23:41:24,604 [4704/LogThread] Successfully opened COM16. Baud rate: 1000000. Flow control: none. Parity: none.
2022-12-14 23:41:24,604 [4704/LogThread] evt> severity(20) message(Successfully opened COM16. Baud rate: 1000000. Flow control: none. Parity: none.)
2022-12-14 23:41:24,605 [18004/StatusThread] RpcAppStatus.resetPerformed: Target Reset performed
2022-12-14 23:41:24,605 [18004/StatusThread] evt> status code(RpcAppStatus.resetPerformed) message(Target Reset performed)
2022-12-14 23:41:25,850 [18004/StatusThread] RpcAppStatus.connectionActive: Connection active
2022-12-14 23:41:25,850 [18004/StatusThread] evt> status code(RpcAppStatus.connectionActive) message(Connection active)
New connection: 3
2022-12-14 23:41:26,022 [19220/EventThread] Exception: MTU exchange reply failed. Common causes are: missing att_mtu setting in ble_cfg_set, different config tags used in ble_cfg_set and adv_start.
2022-12-14 23:41:26,023 [19220/EventThread] <FrameSummary file D:\zhaoyuan_data\dsp\brain_usb\pc-ble-driver-py-master\pc_ble_driver_py\ble_driver.py, line 3001 in ble_event_handler_sync>
2022-12-14 23:41:26,023 [19220/EventThread] <FrameSummary file D:\zhaoyuan_data\dsp\brain_usb\pc-ble-driver-py-master\pc_ble_driver_py\ble_adapter.py, line 800 in on_gatts_evt_exchange_mtu_request>
2022-12-14 23:41:26,023 [19220/EventThread] 
2022-12-14 23:41:26,024 [19220/EventThread] evt> on_gattc_evt_prim_srvc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Service uuid(0x1801) start handle(1) end handle(8)
 Service uuid(0x1800) start handle(9) end handle(13)
2022-12-14 23:41:26,037 [19220/EventThread] evt> on_gattc_evt_prim_srvc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Service uuid(0x0001) start handle(14) end handle(19)
2022-12-14 23:41:26,051 [19220/EventThread] evt> on_gattc_evt_prim_srvc_disc_rsp status(BLEGattStatusCode.attribute_not_found) conn(3)
 
2022-12-14 23:41:26,066 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Characteristic uuid(0x2A05) properties(BLECharProperties(broadcast=0, read=0, write_wo_resp=0, write=0, notify=0, indicate=1, auth_signed_wr=0)) declaration handle(2) value handle(3)
 Characteristic uuid(0x2B29) properties(BLECharProperties(broadcast=0, read=1, write_wo_resp=0, write=1, notify=0, indicate=0, auth_signed_wr=0)) declaration handle(5) value handle(6)
2022-12-14 23:41:26,127 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Characteristic uuid(0x2B2A) properties(BLECharProperties(broadcast=0, read=1, write_wo_resp=0, write=0, notify=0, indicate=0, auth_signed_wr=0)) declaration handle(7) value handle(8)
2022-12-14 23:41:26,142 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.attribute_not_found) conn(3)
 
2022-12-14 23:41:26,156 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x2A05) handle(3)
 Descriptor uuid(0x2902 (Standard.cccd)) handle(4)
2022-12-14 23:41:26,217 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x2B29) handle(6)
2022-12-14 23:41:26,277 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x2B2A) handle(8)
2022-12-14 23:41:26,292 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Characteristic uuid(0x2A00) properties(BLECharProperties(broadcast=0, read=1, write_wo_resp=0, write=0, notify=0, indicate=0, auth_signed_wr=0)) declaration handle(10) value handle(11)
 Characteristic uuid(0x2A01) properties(BLECharProperties(broadcast=0, read=1, write_wo_resp=0, write=0, notify=0, indicate=0, auth_signed_wr=0)) declaration handle(12) value handle(13)
2022-12-14 23:41:26,306 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.attribute_not_found) conn(3)
 
2022-12-14 23:41:26,367 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x2A00) handle(11)
2022-12-14 23:41:26,427 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x2A01) handle(13)
2022-12-14 23:41:26,441 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Characteristic uuid(0x0003) properties(BLECharProperties(broadcast=0, read=0, write_wo_resp=0, write=0, notify=1, indicate=0, auth_signed_wr=0)) declaration handle(15) value handle(16)
2022-12-14 23:41:26,456 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Characteristic uuid(0x0002) properties(BLECharProperties(broadcast=0, read=0, write_wo_resp=1, write=1, notify=0, indicate=0, auth_signed_wr=0)) declaration handle(18) value handle(19)
2022-12-14 23:41:26,516 [19220/EventThread] evt> on_gattc_evt_char_disc_rsp status(BLEGattStatusCode.attribute_not_found) conn(3)
 
2022-12-14 23:41:26,576 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x0003) handle(16)
2022-12-14 23:41:26,591 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x2902 (Standard.cccd)) handle(17)
2022-12-14 23:41:26,606 [19220/EventThread] evt> on_gattc_evt_desc_disc_rsp status(BLEGattStatusCode.success) conn(3)
 Descriptor uuid(0x0002) handle(19)
2022-12-14 23:41:26,666 [19220/EventThread] evt> on_gattc_evt_write_rsp conn(3)
 status(BLEGattStatusCode.success)
 error_handle(0)
 attr_handle(17)
 write_op(BLEGattWriteOperation.write_req)
 offset(0)
 data([])
2022-12-14 23:41:36,675 [4704/LogThread] serial port COM16 closed.
2022-12-14 23:41:36,675 [4704/LogThread] evt> severity(20) message(serial port COM16 closed.)
2022-12-14 23:41:36,675 [16984/MainThread] close result 0
2022-12-14 23:41:36,675 [16984/MainThread] Stopping workers
2022-12-14 23:41:37,681 [16984/MainThread] Workers stopped

Process finished with exit code 0

RE: How to notify the advertising device by pc-ble-driver-py?

Elfving — Wed, 14 Dec 2022 15:17:46 GMT

Hello Zhaoyuan,

I am not seeing any service discovery in your code. Maybe that is why its not getting any CCCDs.

Regards,

Elfving

RE: How to notify the advertising device by pc-ble-driver-py?

zhaoyuan — Tue, 13 Dec 2022 06:06:14 GMT

Hi Elfving,

Thank you for your attention. I am still struggling with this problem and try to solve it.

Regards,

zhaoyuan

RE: How to notify the advertising device by pc-ble-driver-py?

Elfving — Mon, 12 Dec 2022 14:43:18 GMT

Hello,

Just letting you know that I am looking into it, but I will have to get back to you.

Regards,

Elfving