button_less DFU SDK13

[cedric]

Hello, I'm trying the bootlader of SDK13.1, with SD S132_nrf52_4.0.2 I manage to send a ZIP file to the bootloader, but the application doesn't launch. I've tested with buttonless example, but the advertising is still dfuTarg. There must be something I've missed, but I don't know what. I someone could help me... Thanks

[tpwang]

keil SDK13 ble OTA ,upgrade failure causes the device to become unbootable, requiring re-flashing. How can this be resolved? We are using the bootloader_secure_ble bootloader. Does it support dual-bank OTA? Could you provide a reference sample?

[Einar Thorsrud]

Hi,

The secure_bootloader_ble sample support both dual bank and single bank updates. The update will be performed as dual bank if there is enough space for it, but if the application image is too large to allow dual bank update, it is performed as single bank. See Dual-bank and single-bank updates.

If update failes or is aborted during a single bank update, the device is stil recoverable, as it will enter DFU mode, and will requier a successfull DFU operation before the device can function as normal (running the application image). Re-flashing is not needed to recover. If that is required in your case that need further investigation, and I ask that you make a new question for that.