DFU update error

[Junichi]

There are receivers and repeaters with nRF52832 mounted on the board.

When updating with DFU from iPad, a version check error occurs in the customer's environment.

The repeater can be updated normally in the customer's environment, but the receiver gets a version check error.

The DFU file is created by creating a batch file of commands on a Windows PC.

The contents of the batch file are as follows.

nrfutil pkg generate --hw-version 52 --application-version 1 --application Ping_Pong_ISP4520-JP_SEND.hex --sd-req 0x9D --key-file ./private.key DFU_RECV8_1.00_3in1.zip

The name of the hex file remains the same even if the source is changed, so the DFU file name in the batch file is edited and executed to create the DFU file.

The apps used for the update are nRFToolbox and nRF Connect, and both result in a version check error.

What do you think could be the cause?

[Vidar Berg]

Hello,

What version of the application is the target device currently running? The bootloader will by default reject a version downgrade. Also, what version of the Softdevice is present on the device? I'm wondering if it matches the FWID you specfied with  the --sd-req argument.

Best regards,

Vidar

[Junichi]

Some devices can be updated successfully with the same DFU file.

Therefore, there seems to be no problem with the software device version.

When I run it with nRF Connect on my iPhone, I get two errors:

Error5: FW version check failed

Error3: Invalidated parameter

What do you think could be the cause?

[Vidar Berg]

Are you sure all the targets are running are programmed with the exact same FW and version number? The error suggests that they are not. Is it possible to attach a debugger to one of the devices where there update was rejected to check what the application version has been set to?

[Junichi]

I can connect a debugger to the device where the problem is occurring, but I don't know how to check the application version, so please let me know.

[Vidar Berg]

You can run the following commands:

# Read out the flash content of the device to a hex file
nrfjprog --readcode flash_readout.hex
# Use nrfutil to parse the content of the Bootloader settings page.
# This will show the application version.
nrfutil settings display flash_readout.hex
# Read out the FWID of the Softdevice.
nrfjprog --memrd 0x300c