Is bootloader in sdk12 Compatible with the bootloader before sdk12

[jasonbu]

as I found the sample code in sdk12 , the bootloader is quite different with bootloader in sdk11,

event uuid has got changed, is it possible to be compatible?

dual bank got a good feature that if processing abort, it can boot correctly.

And if erase the 0x7F000, this feature may not got full support?

[bjorn-spockeli]

Do you mean if it is possible to update the bootloader from SDK v11.0.0 to SDK v12.0.0 with DFU?

[jasonbu]

yes,that is one of demands, also i found uuid has changed, so android and iOS code will have to make a huge change if we want to use the sdk12 bootloader? event never care the secure dfu

[bjorn-spockeli]

No, the UUID of the DFU Service is different for the Secure DFU bootloader since we need a way do distinguish between Secure DFU and Legacy DFU.

Our Android DFU Library, found here, is compatible with both Secure and Legacy DFU, i.e. it will recognize the UUID and then perform either Legacy or Secure DFU. The iOS library will also support both Legacy and Secure DFU, but it has not been release to GitHub yet.

Furthermore, you should note that the Secure Bootloader in SDK 12.0.0 is larger (~24kB) compared to the bootloader in SDK 11.0.0 (~16kB). This means that if you only allocated 16kB to the bootloader, then you will not be able to update to the bootloader from SDK v12 since there is not enough space.

[jasonbu]

so, secure dfu and Legacy dfu got different uuid now.And a new question: legacy dfu in sdk11 got a feature that will pass the bond info to bootloader, As sdk12 got a buge change about bond info, how to continue using these feature? i do not found legacy bootloader code sample in sdk12

[bjorn-spockeli]

The Legacy bootloader has been replaced by the Secure DFU bootloader and is therefore not present in SDK 12. The peer data sharing feature,i.e. share peer address and bonding information between the the application and bootloader was not added to the SDK v12.0.0 release since the bootloader has migrated to the Peer Manager module.