SDK14 NUS Multilink issue

RE: SDK14 NUS Multilink issue

ScottNordic — Tue, 29 May 2018 16:50:30 GMT

Hi Petter,

I am trying the same thing that Adam was. However, when using Adam's code with your recommended changes, I get <error> app: ERROR 4 [NRF_ERROR_NO_MEM]

Do I have to increase the available memory somewhere?

Thanks

Scott

RE: SDK14 NUS Multilink issue

ScottNordic — Tue, 29 May 2018 15:41:16 GMT

Hi Adam,

Do you have the changes you made to the UART Peripheral code by chance? Were there any major changes?

Thanks!

RE: SDK14 NUS Multilink issue

Giang — Thu, 12 Apr 2018 08:24:31 GMT

It was my problem for a long time until I read this forum . Good luck :D

RE: SDK14 NUS Multilink issue

Enzo — Thu, 30 Nov 2017 03:33:12 GMT

aha , I get it ,function on_hvx() need add code:ble_nus_c_evt.conn_handle=p_ble_evt->evt.gattc_evt.conn_handle;

RE: SDK14 NUS Multilink issue

Enzo — Thu, 30 Nov 2017 03:19:16 GMT

Hi Petter,it's me again..I have a question about function ble_nus_c_evt_handler.When i get BLE_NUS_C_EVT_DISCOVERY_COMPLETE event the p_ble_nus_evt->conn_handle is 0 for first peripheral ,1 for second peripheral. But when i get BLE_NUS_C_EVT_NUS_TX_EVT event it still be 0 .I cannot distinguish which device comes from the message. CODE: case BLE_NUS_C_EVT_DISCOVERY_COMPLETE: err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles); err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c); break; case BLE_NUS_C_EVT_NUS_TX_EVT: ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len); break;

RE: SDK14 NUS Multilink issue

Petter Myhre — Wed, 29 Nov 2017 15:26:06 GMT

Great that it could be of help Enzo :)

RE: SDK14 NUS Multilink issue

Petter Myhre — Wed, 29 Nov 2017 09:55:06 GMT

Great! Let me know if there is anything else that I can help you with.

Not sure, I'll have to look into it a bit. But as I said, as long as you are only doing device discovery on one device at the time, one instance should be enough from my understanding.

RE: SDK14 NUS Multilink issue

Adam Varga — Wed, 29 Nov 2017 09:26:21 GMT

Thank you so much Petter, this solved the issue! Do you think that this is the way it should be done in every multilink project?

RE: SDK14 NUS Multilink issue

Enzo — Wed, 29 Nov 2017 09:16:08 GMT

Thanks Petter. I'm having the same problem just today.After I see your answer ,I change BLE_DB_DISCOVERY_ARRY_DEF back to BLE_DB_DISCOVERY_DEF .It work success with one central and two peripheral.(cause i only have three boards) Thanks again.

RE: SDK14 NUS Multilink issue

Petter Myhre — Tue, 28 Nov 2017 18:25:03 GMT

I tried your project. I believe you get into trouble because of

BLE_DB_DISCOVERY_ARRAY_DEF(m_db_disc, NRF_SDH_BLE_CENTRAL_LINK_COUNT);

I would try with just

BLE_DB_DISCOVERY_DEF(m_db_disc);

I don't think you need so many ble_db_discovery_t instances, at least not if you are connecting and doing service discovery with one peripheral at the time, which I recommend you do first. I see that it is done that way in the multilink example, but I'm not convinced it is necessary.

I will try to look into this a bit further, but this is what I got for now.

RE: SDK14 NUS Multilink issue

Adam Varga — Mon, 27 Nov 2017 12:49:03 GMT

Thank you Petter in advance! I only modified the nus header in its original location. Modified header file: download

Even connecting to 1 peripheral causes this issue.

RE: SDK14 NUS Multilink issue

Petter Myhre — Mon, 27 Nov 2017 12:43:32 GMT

I'll have a look, but have you modified any of the libraries? Because then I need those as well, or share you complete SDK. What do I need to do to reproduce this behavior? Just let one peripheral connect? Or several?

RE: SDK14 NUS Multilink issue

Adam Varga — Thu, 23 Nov 2017 15:05:43 GMT

Dear Petter,

I'm still clueless about this topic so I uploaded my project and I ask for more help. I wanted to make it as straightforward for you as possible. Since I want to make a combination of the multilink and the nus examples, I used the multilink example as my starting point and added the other required functions from the nus example project. The main.c file is very easy to diff to see what I changed.

Obviously, to make it work, you need to place it to the same place as the original project (nRF5_SDK_14.2.0_17b948a/examples/ble_central/).

Link: modified multilink example

Thank you so much if you can allocate some time for my issue. Thanks!

RE: SDK14 NUS Multilink issue

strengthstrong — Wed, 22 Nov 2017 07:23:07 GMT

You solved it, can you tell me?

RE: SDK14 NUS Multilink issue

strengthstrong — Wed, 22 Nov 2017 06:18:10 GMT

i am having the same problem, can you help me

RE: SDK14 NUS Multilink issue

Adam Varga — Tue, 19 Sep 2017 13:31:04 GMT

Nevermind Petter, by giving up I meant that I had more important stuff to do so I just didn't want to spend more time with this :)

RE: SDK14 NUS Multilink issue

Petter Myhre — Tue, 19 Sep 2017 11:42:09 GMT

I'm sorry, it seems I haven't made myself clear, I didn't mean for you to wait for me to make an example. What I meant is that you should continue to try yourself, and if I have time to spare I will make an example. I will of course try to help you if you get into trouble.

If you can't figure out why you get BLE_NUS_C_EVT_DISCOVERY_COMPLETE three times, you can upload your complete project so I can test it here.

RE: SDK14 NUS Multilink issue

Adam Varga — Mon, 18 Sep 2017 15:53:53 GMT

Nothing yet. I gave up and still waiting for a proper answer :)

RE: SDK14 NUS Multilink issue

michaeld — Thu, 14 Sep 2017 13:25:22 GMT

I'm having the same problem. Any news on this Adam Varga?

RE: SDK14 NUS Multilink issue

Adam Varga — Wed, 16 Aug 2017 13:29:22 GMT

That's correct. Thanks for your time in advance Petter!

RE: SDK14 NUS Multilink issue

Petter Myhre — Tue, 15 Aug 2017 13:29:28 GMT

You receive BLE_NUS_C_EVT_DISCOVERY_COMPLETE three times even though you only have one connection? Doesn't seem like the correct behavior. I can see if I find the time to make an example for you.