How to multiple times update program in secure OTA

[Nilesh Bhavsar]

Hi,

I had done secure OTA in my custom board using SDK12.2.0 with S130 v2.0.1 softdevice. But when i am trying to update the same for multiple times then its not happened.

Which configuration needed for multiple times update? Any example is availble in SDK12.2.0?

[bjorn-spockeli]

Could you describe in detail what steps you have done? Do you get an error during the DFU process? Are you using the test images for the SDK or are you generating images using nrfutil with a private/public key pair?

[Nilesh Bhavsar]

Yes, I am generating images using nrfutil with a same private/public key pair which used in first time. I am not getting any error when update the second time but its stuck on "starting Boot loader" message in mobile application.

In the Buttonless DFU example file of the SDK, mostly DFU setting are available and i do for the trigger bootloader multiple times DFU "#define IS_SRVC_CHANGED_CHARACT_PRESENT 1".

If there any other setting is required for that?

[bjorn-spockeli]

Do you get a time out error on the second try? Could you post the nrfutil command that you're using to create the zip packet?

[Nilesh Bhavsar]

No, I am not getting any error but update stuck on waiting Boot loader.

The command which i used for generate zip for first time is nrfutil pkg generate --hw-version 51 --application-version 1 --application nrf51422_xxac.hex --sd-req 0x87 --key-file private.key nilesh.zip

Then, just change the advertisement name and using same private key and public key for generate zip second time and command is nrfutil pkg generate --hw-version 51 --application-version 1 --application nrf51422_xxac.hex --sd-req 0x87 --key-file private.key nilesh_1.zip or once tried with change application version 2.

I am using s130_v2.0.1 soft device.

[bjorn-spockeli]

Have you added the buttonless DFU Service to your application?