nrfutil problem - cannot generate correct CRC

RE: nrfutil problem - cannot generate correct CRC

cidron_noob — Thu, 14 Sep 2017 07:07:53 GMT

Hi Vishal I can't share my code due to non disclosure agreements, but here are the steps you need to do:

Generate a private key using nrfutil.exe
Generate the public key based on the private key you generated earlier, using nrfutil.exe
You will need to build the project at "examples\dfu\bootloader_secure_ble". That is the bootloader.
The project contains a dummy public key which must be replaced with your public key. Otherwise it spits out the bad CRC error (although I am not sure this is an accurate description of the error)
You will also need to download some external dependencies such as uEEC in order to build the project

The bootloader should work now. Remember to generate the .zip package using the correct private key. Good luck

RE: nrfutil problem - cannot generate correct CRC

vishal — Wed, 13 Sep 2017 08:59:51 GMT

Hi Cidron,

I am getting same remote invalid crc error can you guide me or provide some information step by step for my problem. I have search lots of but until unable to find solution. As your application same my application i want update my own firmware using DFU via Mobile apps. Could you provide to me your code for reference. I am flash test example as given in sdk 13.1 is working fine. but when i create my own application zip file is not work. Let me know sir...

Thanks in Advance...

RE: nrfutil problem - cannot generate correct CRC

cidron_noob — Wed, 13 Sep 2017 02:43:31 GMT

Just to inform that the problem has been solved. I actually thought that by using the option --key-file I was sending the public key along with the init data. After I copied the public key into the source code of the bootloader, compiled and used it, DFU programming works fine.

RE: nrfutil problem - cannot generate correct CRC

Jørn — Tue, 12 Sep 2017 13:10:04 GMT

Where did you get the private key?