.fota not generated after building the code


I have successfully build the ble_peripheral_server_hrp_fota sample code. But ble_peripheral_server_hrp_fota.fota is not generated. Could you please suggest your opinion on this.


Would you please provide print _ screen of your Debug window similar to this:

Example: ble_peripheral_server_hrp

The same is for ble_peripheral_server_hrp_sleep

It might help to clear or refresh your workspace from older projects entirely.

Thank you for using our community forum.


please find the below attachment for the debug window of the mentioned sample code.fota|690x202

@reshma9464 Would you please re-attach your project files cause I am not able to download them ? Alternatively, please use my e mail : onhelp@onsemi.com and copy the subject : .fota not generated after building the code
Thank you,


Please find the attachment. I have mailed the same to the mentioned e mail.

@reshma9464 . Please try to clean up your workspace, from any other previous projects and their files so the only project in your workspace will be ble_peripheral_server_hrp_fota.

Another option is to create new workspace and build the new project. After successful build, you should see ble_peripheral_server_hrp_fota.fota file as below:


Thank you for using our community forum !


I tried as you suggested. Still am not getting. Could you please suggest any other options.

Hi @reshma9464

What do you see in the build console window after you build the application?
Maybe you are missing python or some other dependency.

You should have 3 lines near the end related to the FOTA post-build step.
Something like this. No error messages.

make --no-print-directory post-build
Invoking: Cross ARM GNU Create FOTA Image
arm-none-eabi-objcopy -O binary "smartshot_demo_cam.elf" "smartshot_demo_cam.bin" && "C:/Users/user/Workspaces/ON_IDE_35/test/smartshot_demo_cam/RTE/Device/RSL10/mkfotaimg.py" -o "smartshot_demo_cam.fota" "C:/Users/user/Workspaces/ON_IDE_35/test/smartshot_demo_cam/RTE/Device/RSL10/fota.bin" "smartshot_demo_cam.bin"

The build engine does not seem to care if the post build step fails or not and always shows that build finished without errors.

Best regards,


I have tried again and .fota is generated now. I tried loading FOTA image through UART with the following steps:

1.Initially loaded bootloader with bootloader.hex file.
2.Then pressed Reset button followed with DIO5.
3.Released reset initially then DIO5. LED is continuosly ON now
4.Given the command- python updater.py COM4 ble_peripheral_server_fota.fota.

But I am getting Assertion error as no data received as shown below. could you please suggest any solution.
C:\Users\zoyar\onsemi_fota\bootloader\scripts>python updater.py COM4 ble_peripheral_server_hrp_fota.fota
Image : PSHRP ver=2.4.1 / FOTA ver=2.4.1
AssertionError: no data received