nRF5340 - send large data over BLE

RE: nRF5340 - send large data over BLE

tchag — Tue, 13 Sep 2022 15:13:40 GMT

Thanks..
I was able to fix the warning by removing "CONFIG_BT_CTLR_DATA_LENGTH_MAX" to child_image .conf file

RE: nRF5340 - send large data over BLE

Kenneth — Tue, 13 Sep 2022 13:45:04 GMT

I used the example from ncs as-is.

Kenneth

RE: nRF5340 - send large data over BLE

tchag — Tue, 13 Sep 2022 13:37:33 GMT

thanks Kenneth. Did you use prj.conf file to build the sample?

RE: nRF5340 - send large data over BLE

Kenneth — Tue, 13 Sep 2022 08:33:40 GMT

Looks like there is an issue with the vs code extension, if you build straight from the \v2.0.2\nrf\samples\bluetooth\throughput it compiles with no problems. In both cases the compiled hex file is identical, so I assume you can ignore the problem in this case. The vs code exension team is looking into it, and it should be fixed in next release (~month).

Kenneth

RE: nRF5340 - send large data over BLE

tchag — Mon, 12 Sep 2022 14:09:56 GMT

I have tried creating a new Freestanding application as-is using the "throughput" template but still getting the warnings.

I have attached the template creation, build cfg and build warnings screenshot and config files for the sample application.

Is this something issue with my toolchain installation or it is expected to be fixed during the dev based on the their env setups?

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_SHELL=y

CONFIG_BT_DEVICE_NAME="Nordic_Throughput"
CONFIG_BT=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_SMP=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_CENTRAL=y
CONFIG_BT_MAX_CONN=2

CONFIG_BT_SCAN=y
CONFIG_BT_SCAN_FILTER_ENABLE=y
CONFIG_BT_SCAN_UUID_CNT=1

CONFIG_BT_THROUGHPUT=y

CONFIG_BT_GATT_DM=y
CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_BT_USER_DATA_LEN_UPDATE=y
CONFIG_BT_USER_PHY_UPDATE=y
CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n

CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_CONN_TX_MAX=10
CONFIG_BT_L2CAP_TX_BUF_COUNT=10
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y
CONFIG_BT_CTLR_PHY_2M=y
CONFIG_BT_CTLR_RX_BUFFERS=2
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251

CONFIG_DK_LIBRARY=y
CONFIG_DK_LIBRARY_DYNAMIC_BUTTON_HANDLERS=y


########################CHILD IMAGE hci_rpmsg.conf
#
# Copyright (c) 2021 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
CONFIG_BT_BUF_ACL_RX_SIZE=251

CONFIG_BT_MAX_CONN=2

RE: nRF5340 - send large data over BLE

Kenneth — Mon, 12 Sep 2022 08:47:45 GMT

I tried compiling the throughput example here as-is, no warnings.

Kenneth

RE: nRF5340 - send large data over BLE

tchag — Thu, 08 Sep 2022 18:11:11 GMT

sure, I will try that

the reason for asking whether to ignore the warning is because the throughput sample build also has generated up same warning messages

RE: nRF5340 - send large data over BLE

Kenneth — Thu, 08 Sep 2022 17:04:55 GMT

You should resolve this yes, for instance by copy and paste the config from the two conf files I linked to. If you ignore this, then the packets will be split on air, reducing the throughput and increasing power consumption.

Kenenth

RE: nRF5340 - send large data over BLE

tchag — Thu, 08 Sep 2022 13:48:06 GMT

Thank you.
I have added the config for the child image andwas able to update the MTU length without updating from Mobile application, but I'm getting an follwing warning. Is this waring can be ignored?

RE: nRF5340 - send large data over BLE

Kenneth — Thu, 08 Sep 2022 12:33:18 GMT

Hello,

Take a look at the https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/throughput/README.html example, for instance you can find that some of the config options you share should be set for the network core (child image) and some on the application core.

nrf\samples\bluetooth\throughput\prj.conf
nrf\samples\bluetooth\throughput\child_image\hci_rpmsg.conf

Kenneth