Issue with nRF Connect and DFU service support for BT4 and BLE 5

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Fri, 19 Apr 2024 05:26:11 GMT

Okay, Thank you for the information

Shreya

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Vidar Berg — Thu, 18 Apr 2024 12:58:44 GMT

[quote userid="126321" url="~/f/nordic-q-a/107424/issue-with-nrf-connect-and-dfu-service-support-for-bt4-and-ble-5/479442"]Yes we have searched but we didnt get list of mobile phones there.[/quote]

It would be nice if someone maintained a list of all phones that support CODED PHY, but I'm not aware of any such list.

[quote userid="126321" url="~/f/nordic-q-a/107424/issue-with-nrf-connect-and-dfu-service-support-for-bt4-and-ble-5/479442"]we are entering into Bootloader mode manually and then doing DFU for DFUTARG. [/quote]

That's fine, but it won't be possible to perform DFU if the bootloader is using coded PHY but not the phone.

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Thu, 18 Apr 2024 12:54:54 GMT

[quote userid="4240" url="~/f/nordic-q-a/107424/issue-with-nrf-connect-and-dfu-service-support-for-bt4-and-ble-5/479436"] Therefore, you must specifically check for CODED PHY support in the feature list. iPhones do not support it. [/quote]

Yes we have searched but we didnt get list of mobile phones there.

[quote userid="4240" url="~/f/nordic-q-a/107424/issue-with-nrf-connect-and-dfu-service-support-for-bt4-and-ble-5/479436"]How are you going to perform the update without coded PHY if the bootloader is only advertising with this PHY?[/quote]

we are entering into Bootloader mode manually and then doing DFU for DFUTARG.

Thank you,
Shreya

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Vidar Berg — Thu, 18 Apr 2024 12:50:29 GMT

Hi Shreya,

CODED PHY is an optional feature in Bluetooth 5. Therefore, you must specifically check for CODED PHY support in the feature list. iPhones do not support it.

[quote user="Shreya J B"]Most of the times we will perform DFU with CODED PHY.[/quote]

How are you going to perform the update without coded PHY if the bootloader is only advertising with this PHY?

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Thu, 18 Apr 2024 09:55:34 GMT

Hi Vidar,

[quote userid="4240" url="~/f/nordic-q-a/107424/issue-with-nrf-connect-and-dfu-service-support-for-bt4-and-ble-5/479192"]There are still many phones that don't support CODED PHY[/quote]

Yes, even we are searching for latest low-cost mobile phone which support this feature. In nrfconnect Device information it is provided that it supports but, in some phones it shows the list of devices advertising in BLE5 but not able to connect.

[quote userid="4240" url="~/f/nordic-q-a/107424/issue-with-nrf-connect-and-dfu-service-support-for-bt4-and-ble-5/479192"]Is the plan to always perform DFU with CODED PHY, and in that case, is it ok that DFU won't be supported for all phones? [/quote]

Most of the times we will perform DFU with CODED PHY. it's okay if doesn't support all the phones. can we get to know exactly which phones support DFU with CODED PHY.
I have checked the previous posted queries regarding phones supporting CODED PHY. Those all are of more than 3 years. we are looking for latest phones.

Thank you,
Shreya

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Vidar Berg — Wed, 17 Apr 2024 11:41:55 GMT

[quote user="Shreya J B"]but only some mobile phones support this feature. [/quote]

There are still many phones that don't support CODED PHY. Is the plan to always perform DFU with CODED PHY, and in that case, is it ok that DFU won't be supported for all phones? Also, is the main app using coded PHY as well?

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Tue, 16 Apr 2024 05:57:31 GMT

Hi Hung Bui,

I have tried doing DFU with nRF DFU app, even it has same problem. I have attached screenshot for your reference. currently we are updating the firmware by entering into bootloader manually. but only some mobile phones support this feature.

Thanks for the support.
Shreya

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Hung Bui — Tue, 23 Jan 2024 12:40:55 GMT

Hi Shreya,
Have you tried the nRF DFU app, maybe it doesn't have the same problem ?

Could you show how you modified the bootloader to do CODED PHY advertising ?
Have you made sure you don't change the address of the bootloader ? There is a mechanism in the bootloader so that it will be either the same address as the application or increase the application address by 1.
Also another question is that wouldn't it be better with non-CODED PHY when doing DFU ? CODED PHY has much lower throughput compare to 1 or 2MBps and the end user quite often is close to the device when doing DFU.

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Tue, 23 Jan 2024 12:12:05 GMT

Hi Hung Bui,

Actually it is taking time to do DFU from our app. it would be helpful if it is supported in nrf connect.

Thank you,

Shreya

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Hung Bui — Mon, 22 Jan 2024 14:30:00 GMT

Hi Shreya,

I don't see any issue with the trace.
Most likely it's the app that doesn't support scanning in extended advertising CODED PHY when doing automatically reconnect. I will have to check with the team to see if this supported.

I would assume you can instruct the end customer to do 2 steps DFU , first is to switch to bootloader and second is to manually connect to the bootloader.

Do you plan to make your own app for DFU and for your application ? If it's the case, you can implement a 2 steps DFU so that it's transparent to the end customer.

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Mon, 22 Jan 2024 09:18:22 GMT

Hi,

Please check sdk_config.h for

NRF_SDH_BLE_SERVICE_CHANGED 1

PM_SERVICE_CHANGED_ENABLED 1

checked, both are enabled in sdk_config.h. can you suggest what need be done?

I have attached the sniffed trace. which contain data during advertising, connect, trying to DFU then disconnect.

devzone.nordicsemi.com/.../sniffed-data-during-dfu-initiation.pcapng

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Hung Bui — Fri, 19 Jan 2024 12:24:12 GMT

Please double check your sniffer configuration:
BLE sniffer support for coded phy

[quote user="Shreya J B"]

yes tried to put device in bootloader mode manually, then DFU was successful.

We tried doing the DFU from SD & Bootloader. DFU was successful.

[/quote]

From what you reported it seems that the problem is at when you switch from application to the bootloader, the phone couldn't reconnect to the bootloader.

Please double check that you have service changed characteristic enable on both your application and the bootloader. Please check sdk_config.h for

NRF_SDH_BLE_SERVICE_CHANGED 1

PM_SERVICE_CHANGED_ENABLED 1

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Fri, 19 Jan 2024 10:57:57 GMT

Hi Hung Bui,

We have followed all the above mentioned steps. but wireshark is able to see all the BLE 4 advertising devices but not the BLE 5 coded PHY device. Any suggestions?

yes tried to put device in bootloader mode manually, then DFU was successful.

We tried doing the DFU from SD & Bootloader. DFU was successful.

Thank you.

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Hung Bui — Wed, 17 Jan 2024 15:34:35 GMT

Hi Shreya,
Have you tried to follow the document to install all the prerequisite software needed.
Have you called nrf_sniffer_ble.bat as instructed at step 3 here: https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/installing_sniffer_plugin.html?cp=11_5_2_3

We have a guide here on how to use it: https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-6-bluetooth-le-sniffer/topic/nrf-sniffer-for-bluetooth-le/

Could you follow my suggestion to try putting the device into bootloader mode manually ? Then try to use the phone to connect to the bootloader.

You can also try flashing only the softdevice and the bootloader and try to do DFU from there.

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Shreya J B — Wed, 17 Jan 2024 12:08:21 GMT

Hi Hung Bui,

Do you have the issue if you do 1Mbps PHY in your application? :
Our application works ok for 1Mbps. Sorry didn't get your question, can you give more details about the question.

Did you modify the bootloader to use CODED PHY or the bootloader still do 1Mbps PHY ?
We have modified the bootloader to advertise in BLE 5 coded PHY

try capture a sniffer trace when the bootloader is connected to the phone:
I have used the USB where the debugger is connected, getting erorr -> nRF Sniffer extcap pipe gives error FIFO does not exist. I checked if the com port exists and it generates some data, and it does do something. I checked by using USB port near to reset button. but then nrfSniffer interface was not visible.

Could you please suggest how to proceed?!.

Thank you

RE: Issue with nRF Connect and DFU service support for BT4 and BLE 5

Hung Bui — Tue, 16 Jan 2024 12:37:51 GMT

Hi Shreya,

What I can see in the log is that after nRF Connect app send the command to switch the device to bootloader mode, it's failed to reconnect or having trouble when sending write command after connected to the bootloader.

Do you have the issue if you do 1Mbps PHY in your application?
Did you modify the bootloader to use CODED PHY or the bootloader still do 1Mbps PHY ?
Could you try to switch the application to bootloader manually (write 0x01 to the Buttonless characteristic after enable Indication). The bootloader will start advertising as DFUTarg and then you can connect to the bootloader from the phone and do DFU update.

Please try capture a sniffer trace when the bootloader is connected to the phone.