Hello,
I tried to follow the instructions in this tutorial:
github.com/.../nRF52832-buttonless-dfu-development-tutorial
1) I flashed this file via nrfjprog:
examples\dfu\secure_dfu_test_images\ble\nrf52832\sd_s132_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex
2) As an additional check I used nRFgo Studio to verify the S132 Softdevice. This was also successful.
3) Since I only have one DK i tried to flash hrs_application_s132.zip using the nRF Toolbox on my Android smartphone:
3a) I selected the zip file and set the scope to "Application only".
3b) The DK was visible as "Nordic_Buttonless"; I selected it.
3c) I clicked "Upload".
3d) I get the error message "Upload failed: DFU device disconnected"
I am using both the bootloader and the hrs_application from the nRF5_SDK_15.2.0_9412b96.
Do you have any suggestions what to look for? Thanks!