RE: Disable and enable BLE OTA/DFU service

SubuMuthu — Mon, 13 Jan 2025 14:47:31 GMT

Hi,

I understand that Matter uses different DFU, which is already working for us. For clarity, I am talking about BLE OTA via GATT DFU SMP service (https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/libraries/bluetooth/services/dfu_smp.html) we want to update the firmware using BLE for this matter product. We are also able to do that.

Rephrasing the questions:

#1: we would like to enable and disable the BLE OTA from our application. Is there a way to do it?

Thanks.

Subu

RE: Disable and enable BLE OTA/DFU service

Amanda Hsieh — Mon, 13 Jan 2025 14:01:30 GMT

Hi,

[quote user=""]#1. Is there way to disable and enable the DFU? we looked at dfu/smp/dfu_over_smp, which has a API for starting the service but I don't this API is called. [/quote]

Matter uses a different DFU config rather than dfu_over_smp.

To configure the application to support the DFU over Matter and SMP, you can use the CONFIG_CHIP_DFU_OVER_BT_SMP.

You can disable DFU support by setting the CONFIG_CHIP_DFU_OVER_BT_SMP and CONFIG_CHIP_OTA_REQUESTOR Kconfig options to n, and removing the pm_static_nrf54l15pdk_nrf54l15_cpuapp_release.yml file if you are using a Matter sample from NCS.

[quote user=""]#3. Clarification: we assume that the DFU uses the same level of security as the other services. For example, if we set a customer service to L4(encryption), DFU will also be encrypted?[/quote]

You can additionally require BLE pairing to perform OTA update with CONFIG_MCUMGR_TRANSPORT_BT_AUTHEN.

Regards,
Amanda H.