RE: Updating nrf52840 through nrf9160 on the nrf9160dk

Carl Richard — Wed, 21 Apr 2021 13:52:32 GMT

Hello again!

My best suggestion for this is to implement your own SMP client for the nRF9160 using the Zephyr specific bindings for SMP can be found at zephyr/subsus/mgmt/mcumgr. We don't have much in terms of sample code for this, but you could look into the Central DFU SMP sample which implements a BLE SMP client. In addition this case may be relevant when it comes to encoding.

Best regards,
Carl Richard

RE: Updating nrf52840 through nrf9160 on the nrf9160dk

Carl Richard — Tue, 20 Apr 2021 12:10:29 GMT

Hello, Erlend!

Great to hear that you're progressing!

1. Increasing the baud rate of the UART is likely the best method for increasing the transfer speed. Though, based on what Jared writes in this thread there may be some lack of support for increased speed on the Zephyr-side of things.
2. This functionality has been moved out of Kconfig and into the Device Tree Structure (DTS). You can find more information about this in the nRF9160DK - nRF52840 documentation.
3. I'll get back to you on this shortly, but if you get an SMP client running on the nRF52 it should be possible to transfer the image from the nRF9160 using SPM and mcumgr.

Best regards,
Carl Richard