Enabling multiple firmware/application updates on NRF5340 DK board using DFU feature

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@TheYoctoJester I was wondering how do you deploy multiple firmware upgrades using this method. As an example let’s say I create a mender artefact for program A and deploy it- it successfully flashes on to my NRF5340 DK board and starts executing. Now when this program is executing, I don’t have a way to make the device go back to DFU mode. If the device doesn’t go to DFU mode when I deploy the artefact, then it fails. So how do I trigger my board to come to DFU mode before deploying the artefact?