DFU options for "hci_lpuart" on the nrf52840 of nrf9160dk

RE: DFU options for "hci_lpuart" on the nrf52840 of nrf9160dk

Menon — Wed, 14 Jun 2023 16:51:12 GMT

ello,

Sorry I missed this ticket during the long public holiday here and I was out of office last week .

[quote user=""]

nrf9160-modem:

- UART1: YES - fmfu_smp_svr sample using the python script over uart1

- BLE DFU: NO - is there any way to update the modem using the BLE SMP server?

[/quote]

You can just download the modem update into mcuboot_secondary slot just like updating the application, but do not tag test/confirm. Then you can use the DFU target library to perform the modem update.

[quote user=""]

nrf52840:

- UART1: NO

- BLE SMP SVR: NO

- AWS FOTA over LTE: NO

[/quote]

In this case Serial recovery would be the way. You can run the SMP client on the nRF9160. There is an example from my colleague you can refer to.

As an alternative you can keep the two options(SMP_server and SMP_client) in nRF52840 and keep a switch for MCUbbot, for opting the application.

Reset the 52840 with some pin set from 9160 and now the SMP_server will be active.(see the below diagrams)

Kind Regards,

Abhijith

RE: DFU options for "hci_lpuart" on the nrf52840 of nrf9160dk

CRD — Mon, 15 May 2023 13:45:46 GMT

Hi Menon,

Thank you. To do it over BLE I plan to do the same thing as LTE. Transfer the full file over BLE to the nrf9160 and then trigger the update to the nrf52840 over the internal uart.

Should we be able to store the nrf52840 firmware in slot 1 temporarily (we are using mcuboot) on the nrf9160 or would we need external flash for this (This should be the same for LTE or BLE).

RE: DFU options for "hci_lpuart" on the nrf52840 of nrf9160dk

Menon — Mon, 15 May 2023 11:52:24 GMT

Hello,

Once again sorry for the long response time.

[quote user=""]So far my idea here is to add MCUboot the the hci_lpuart project and add serial recovery over uart0 (normally used for BLE communication between the nrf52840 chip and the nrf9160 on the board). Then from the nrf9160 I can pull the serial recovery GPIO low (set in the child_image of the hci_lpuart mcuboot) and reset the nrf52840 to boot the nrf58240 into serial recovery DFU mode then run the update script to flash the nrf52840?[/quote]

The suggestion on updating the nRF52840 via UART recovery mode is fine. You will receive the image via LTE on the nRF91 and then you can update the nRF52840.

Are you looking for an update over BLE?

Kind Regards,

Abhijith

RE: DFU options for "hci_lpuart" on the nrf52840 of nrf9160dk

Menon — Tue, 09 May 2023 10:49:41 GMT

Hello,

Sorry for the long response time. I was busy the last few days, attending some trainings. Letting you know I have started looking into this and will get back to you soon.

Kind Regards,

Abhijith