Gracefully shutting down modem doing BLE DFU

[iivanov]

We are using NRF52840 and modem HL78XX, zephyr NCS 2.4.1.

BLE DFU could be started at any time and modem could be active during all DFU process and during reset by FOTA.

What is the best way to gracefully shutdown modem during BLE DFU before reset occurs?

Any callback is available to set to be notified when DFU started or finished?

Kind regards

[Vidar Berg]

Hello,

Yes, it is possible to subscribe to mcumgr events to know when DFU has started, please see MCUmgr Callbacks. I'm not familiar with the modem your using, but I assume you may want to terminate any existing connections when receiving the DFU started event.

Kind regards,

Vidar

[iivanov]

Hello,

Thanks for advice.

Yes, we found that it is possible to use MCUmgr Callbacks with mcumgr events subscribed.

Works fine.

Kind regards