Secure OTA failed in custom board

RE: Secure OTA failed in custom board

Hung Bui — Wed, 02 May 2018 07:16:31 GMT

Please try to read the flash out and check if the new image is copied to the application flash area as it supposed to be (use nrfjprog --readcode , then compare hexes)

Please try to debug the bootloader if the image is copied correctly. Check why it stays in bootloader mode but not enterring application. There is a check for valid application in side the bootloader initial code.

You can step in the code and check the difference between with and without the transistor, what make the difference.

You may need to use the _debug version of the bootloader and change the optimization level to 0

RE: Secure OTA failed in custom board

Nilesh Bhavsar — Tue, 01 May 2018 06:00:31 GMT

I am using SDK 12.2 in that my BOOTLOADER_BUTTON is BSP_BUTTON_3 which is actually BUTTON_4 and its connected with pin no. 20.

But in my case, if i remove transistor than everything is working properly and this transistor is used for triggering relay. Also we put same connection circuit in our old Design which works properly.

RE: Secure OTA failed in custom board

Hung Bui — Mon, 30 Apr 2018 14:07:01 GMT

Which SDK are you using ?

Note that we use a button in the bootloader to detect that it has to stay in bootloader instead of jumping to application. P0.18 is button 2 on our DK, but is there any chance that you used button 2 (P0.18) to enter bootloader mode in your application ? Check BOOTLOADER_BUTTON, or nrf_dfu_enter_check() in your bootloader code.

RE: Secure OTA failed in custom board

Nilesh Bhavsar — Mon, 30 Apr 2018 13:36:37 GMT

Hi,

When first i upload the softdevice and then bootloader. After that its start advertising "DFUTarg" then upload my application .zip.

In nRF Connect application, my transfer process start and complete successfully but after that not advertising as per my application name and advertising same as last "DFUTarg".

But if i remove transistor than without updating code it starting to advertise names per my application. So, maybe not switching on application mode.

Samething is working on a old Design slave.

I am not trying with Blinking an LED Example.

RE: Secure OTA failed in custom board

Hung Bui — Mon, 30 Apr 2018 13:25:40 GMT

Hi,

Could you clarify how do you know that "transferred process has been completed successfully but not transferred actually." ?

Have you tried to compare the flash ?

What exactly you mean by "not working" ? The device stayed in the bootloader mode, not switching to application ? Or it switched to application but application crashed ?

Have you tried to update simple application, for example blinking an LED ?