Developing on EVK NINA B111

RE: Developing on EVK NINA B111

Sigurd — Wed, 02 May 2018 14:11:30 GMT

Hi,

I'm happy to hear it worked.

The event length is the time set aside for a connection on every connection interval in 1.25 ms units. The event length should be used together with the connection interval to set the desired bandwidth of the connection. It is used to ensure a fair allocation of the available radio time resources between the existing roles(i.e. if you run multilink). There is no defined maximum value, but for a single-link peripheral you should set it to match the maximum connection interval you use, in order to be able to send packets for the whole connection event

RE: Developing on EVK NINA B111

Stagiair — Wed, 02 May 2018 13:15:07 GMT

Hi Sigurd,

Thank you, step 2 worked for me! Is 320 the max NRF_SDH_BLE_GAP_EVENT_LENGTH?

RE: Developing on EVK NINA B111

Sigurd — Wed, 02 May 2018 12:16:42 GMT

Hi,

There are a couple of things you could try.

1) By setting the hvn_tx_queue_size, you are setting the minimum guaranteed number of Handle Value Notifications that can be queued for transmission. Try to increase this, if step 2 does not work.

2) But, even if the application configures a large number of packets to be queued, not all of them will be sent during a single connection event if the configured event length(NRF_SDH_BLE_GAP_EVENT_LENGTH) is not large enough to send the packets. You should therefore make sure that you set the NRF_SDH_BLE_GAP_EVENT_LENGTH in sdk_config.h to a high enough number (try 320).

3) If you still get NRF_ERROR_RESOURCES, either try again until you get NRF_SUCCESS or wait for the BLE_EVT_TX_COMPLETE event before you try again.

RE: Developing on EVK NINA B111

Stagiair — Fri, 20 Apr 2018 09:12:19 GMT

Hi,

I don't quite get it. The code is already splitting the data in parts of 20 bytes. So I think it has something to do with the fifo buffer. My code returns the NRF_ERROR_RESOURCES error. I’ve read that this means the BLE buffers are full. In here:

https://devzone.nordicsemi.com/f/nordic-q-a/23118/introducing-fifo-buffer-in-uart_data_handler-function

How can I prevent this in softdevice 132 v6.0.0

Kind regards,

Bob

RE: Developing on EVK NINA B111

ketil — Thu, 19 Apr 2018 08:47:26 GMT

Hi Bob,

If you do a search for uart 20 bytes on DevZone you will find several cases with answers. Please let me know if this enables you to solve your problem or if you require further assistance.

Ketil

RE: Developing on EVK NINA B111

Stagiair — Wed, 18 Apr 2018 14:21:28 GMT

Hi Ketil,

Yes I did manage to figure this out. I have a new problem. I want to send a json string from LPC to NINA over UART. When the Json string is bigger than 20 characters the NINA module can't handle the data. Is an example available for handling the data received over UART?

Kind regards,

Bob

RE: Developing on EVK NINA B111

ketil — Tue, 10 Apr 2018 12:04:41 GMT

Hi again Bob,

Did you manage to figure this out or would you still like assistance?

Ketil

RE: Developing on EVK NINA B111

ketil — Fri, 23 Mar 2018 12:18:48 GMT

Hi Bob,

Just wanted to let you know that we have received your support case. Due to Easter holiday we may not be able to provide an answer until week 14. Sorry for any inconvenience.

Ketil