NCS2.0 MCUBOOT OTA startup with old firmware not the new one after upload app_update.bin

[Jimmy]

We follow the OTA guide:  Add DFU support to your application 

Add below code in main.c:

    printk("build time: %s %s Version: %s\n", __DATE__, __TIME__, CONFIG_MCUBOOT_IMAGE_VERSION);

    os_mgmt_register_group();

    img_mgmt_register_group();

    smp_bt_register();

Our prj.conf:

CONFIG_MCUMGR=y

CONFIG_MCUMGR_CMD_IMG_MGMT=y

CONFIG_MCUMGR_CMD_OS_MGMT=y

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_MCUMGR_SMP_BT=y

CONFIG_MCUMGR_SMP_BT_AUTHEN=n

CONFIG_IMG_ERASE_PROGRESSIVELY=y

CONFIG_MCUBOOT_SIGNATURE_KEY_FILE="child_image/mcuboot/mcuboot_private.pem"

CONFIG_MCUBOOT_IMAGE_VERSION="0.0.0+0"

......

Mcuboot prj.conf:

CONFIG_SIZE_OPTIMIZATIONS=y

CONFIG_HW_STACK_PROTECTION=n

CONFIG_SYSTEM_CLOCK_NO_WAIT=y

CONFIG_PM=n

CONFIG_MAIN_STACK_SIZE=10240

CONFIG_BOOT_BOOTSTRAP=n

CONFIG_BOOT_ENCRYPT_RSA=n

CONFIG_BOOT_SIGNATURE_TYPE_RSA=y

CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y

CONFIG_BOOT_SIGNATURE_KEY_FILE="mcuboot_private.pem"

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

CONFIG_FLASH=y

CONFIG_BOOT_ERASE_PROGRESSIVELY=y

CONFIG_SOC_FLASH_NRF_EMULATE_ONE_BYTE_WRITE_ACCESS=y

CONFIG_USE_SEGGER_RTT=y

CONFIG_LOG=y

CONFIG_LOG_DEFAULT_LEVEL=2

CONFIG_LOG_MAX_LEVEL=3

CONFIG_LOG_PRINTK=y

CONFIG_LOG_MODE_IMMEDIATE=y

CONFIG_LOG_BACKEND_SHOW_COLOR=n

CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP=n

Build the project, then flash to device, the rtt log:

Then we change CONFIG_MCUBOOT_IMAGE_VERSION="0.0.1+0", rebuild project, and use nRF Connect update the app_update.bin to device, everything is ok, but after device reboot, the rtt log is the same with old one:

The nRF Connect log:

The mcuboot exec the old firmware after upload app_update.bin success, how can this happen? What i missed?

[Hung Bui]

Hi Jimmy, 

Have you tried to change the content of the application and rebuild ? Can be just as little as the text in the log. As far as I know if the hash of the image binary matches with the current image(s) on the chip it will reject the image upload. 

[Jimmy]

I have confirmed the main.c is changed before rebuild, and i can see the hash is diffrent from Device Manage app:

[Hung Bui]

Hi Jimmy, 
If you click on CONFIRM, do you see slot 1 being swapped  ? 

[Jimmy]

I clicked the "CONFIRM", and  then "SEND RESET COMMAND", the result is the same

[Hung Bui]

Hi Jimmy, 

I noticed that in the log MCUBoot was responding with "NOT SUPPORTED" it seems that there were an issue with confirming the image. 
Have you tested without changing the signing key ? Have you managed to do DFU update with MCUBoot before ? 

As far as I know CONFIG_MCUBOOT_SIGNATURE_KEY_FILE is obsoleted and you should use CONFIG_BOOT_SIGNATURE_KEY_FILE in the mcuboot configuration only (either by the mcuboot prj.conf of by the overlay in child_image\mcuboot.conf). 

But I think it's the best to not changing the key and use the default key for testing first. 

Please try to follow the guide here.  Please use option "Confirm only" when you test. 

[Jimmy]

I delete the below config:

app prj.conf:

# Enable mcumgr.

CONFIG_MCUMGR=y

CONFIG_MCUMGR_CMD_IMG_MGMT=y

CONFIG_MCUMGR_CMD_OS_MGMT=y

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_MCUMGR_SMP_BT=y

CONFIG_MCUMGR_SMP_BT_AUTHEN=n

CONFIG_IMG_ERASE_PROGRESSIVELY=y

# CONFIG_MCUBOOT_SIGNATURE_KEY_FILE="child_image/mcuboot/mcuboot_private.pem"

CONFIG_MCUBOOT_IMAGE_VERSION="0.0.0+0"

mcuboot pro.conf:

# CONFIG_BOOT_ENCRYPT_RSA=n

# CONFIG_BOOT_SIGNATURE_TYPE_RSA=y

# CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y

# CONFIG_BOOT_SIGNATURE_KEY_FILE="mcuboot_private.pem"

And use nRF Connect app to upload just "Confirm only" option (Can not use Device Manage app, there are some bug:  RE: DFU - Device Manager Question - Payload(250 bytes) too long for MTU: 249 ). 

The result is the same. The only diffrent is "CONFIRM" button is not clieckble in Device Manage app:

[Jimmy]

I use the new version of Device manage app, it show "Image not confirmed".

So, why my image cannot confirmed ?

[Hung Bui]

Hi Jimmy, 
I was just following the guide again and it worked just fine. 
Could you try to test the following project. It's made with NCS v2.2.0 but it should work with earlier SDK as well. 

I also attached here the two bin files that you can use to test. By using app_update3, the device should advertise as "Zephyr Heartrate 3" instead of "Zephyr Heartrate 2" and you can use the other file to update back to "Zephyr Heartrate 2".
The hex and bin file was built for nRF52832 but it would work with nRF52833 as well. 

1526.peripheral_hr_smp.zip

2287.merged.hex

app_update2.bin

app_update3.bin

[Jimmy]

I have try both your bin file and build with source code. It stuck when i clieck start uploard:

[Hung Bui]

Hi Jimmy, 
Could you try: 
Flash merged.hex 
Use the phone to DFU update app_update3.bin  ?

How did you get it to advertise Zephyr heartrate 3 ?