Hi, I'm trying to install the BLE buttonless DFU template onto a nRF52 (PCA10040) eval board using the secure bootloader example (with s132, version 12.2 of the SDK) via nRF Toolbox. There's no application there to begin with, but I've specified that in the bootloader settings. The process seems to go correctly (takes about 30 seconds, progress bar moves smoothly) and the toolbox gives a message that upload is complete. After that, I'd expect to find application code in flash starting at 0x1f000, but it's all 0xff's. I'm attaching the output from nrfutil pkg display for the app. Is there some common mistake that would lead to this situation? Thanks very much.pkg.txt
Edit: I ran the debug build of the bootloader and I am seeing what looks like a successful transfer but a bunch of erases after reset and a CRC error. I'm attaching the log. Thanks for any insight! errorlog.txt
Edit 2: As requested, here is the full hex dump and app package file. template5.zip nrf52_hexdump.txt.zip
Edit 3: I tried the process using the example bootloader (secure_dfu_secure_dfu_ble_s132_pca10040_debug.hex) and sample zip file (dfu_test_app_hrm_s132.zip) and got the same failure. For clarity (and because I think I'm still making a simple mistake) here are the steps I took: (1) source bin/activate (2) nrfutil settings generate --family NRF52 --bootloader-version 1 --bl-settings-version 1 blsettings.hex (3) mergehex -m secure_dfu_secure_dfu_ble_s132_pca10040_debug.hex blsettings.hex -o bootloaderpkg.hex (4) nrfjprog --eraseall -f nrf52 (5) nrfjprog --reset --program bootloaderpkg.hex --family NRF52 (6) Turn off eval board and turn back on holding down button 4 (7) Start up JLinkExe and JlinkRTTClient for logging purposes (8) transfer dfu_test_app_hrm_s132.zip from iPhone using nrf toolbox. When I do that, I get this log exampleprogramlog.txt
