nRFUtil - error while generating private key

[Murthy Udupa]

I am using nrfutil version 5.2.0 on a Mac Pro M1, running Mac OS Monterey 12.1. I get the following error when I try to generate a private key

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Us-MacBook-Pro:DFU ugmurthy$ nrfutil keys generate private.pem Traceback (most recent call last):

File "/Users/ugmurthy/.pyenv/versions/3.9.9/bin/nrfutil", line 33, in sys.exit(load_entry_point('nrfutil==5.2.0', 'console_scripts', 'nrfutil')())

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/click/core.py", line 829, in __call__ return self.main(*args, **kwargs)

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/click/core.py", line 782, in main rv = self.invoke(ctx)

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/click/core.py", line 1259, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx))

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/click/core.py", line 1259, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx))

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/click/core.py", line 1066, in invoke return ctx.invoke(self.callback, **ctx.params)

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/click/core.py", line 610, in invoke return callback(*args, **kwargs)

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/nordicsemi/__main__.py", line 434, in generate signer.gen_key(key_file)

File "/Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages/nordicsemi/dfu/signing.py", line 79, in gen_key sk_file.write(self.sk.to_pem())

TypeError: write() argument must be str, not bytes

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Grateful for any pointers to resolve this. thanks.

[Øyvind]

Hello, 

Is there a reason for using v5.2.0 and not the latest v6.1.3? Can you please try reinstalling to latest version?

Thanks.

Kind regards,
Øyvind

[Murthy Udupa]

Thanks for your reply.

I don't have a reason to use v5.2.0

Tried installing v6.1.3 using following command and got an error

pip install --upgrade nrfutil==6.1.3
Collecting nrfutil==6.1.3
  Using cached nrfutil-6.1.3.tar.gz (844 kB)
  Preparing metadata (setup.py) ... done
Requirement already satisfied: click in /Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages (from nrfutil==6.1.3) (7.1.2)
Requirement already satisfied: crcmod in /Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages (from nrfutil==6.1.3) (1.7)
Requirement already satisfied: ecdsa in /Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages (from nrfutil==6.1.3) (0.13.3)
Requirement already satisfied: intelhex in /Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages (from nrfutil==6.1.3) (2.3.0)
Requirement already satisfied: libusb1==1.9.3 in /Users/ugmurthy/.pyenv/versions/3.9.9/lib/python3.9/site-packages (from nrfutil==6.1.3) (1.9.3)
ERROR: Could not find a version that satisfies the requirement pc_ble_driver_py>=0.16.1 (from nrfutil) (from versions: 0.1.0, 0.2.0, 0.3.0, 0.4.0, 0.5.0, 0.6.0, 0.6.1, 0.6.2, 0.8.0, 0.8.1, 0.9.0, 0.9.1, 0.10.0, 0.11.0, 0.11.1, 0.11.2, 0.11.3, 0.11.4)
ERROR: No matching distribution found for pc_ble_driver_py>=0.16.1

Is there any other way to get v6.1.3?

[Murthy Udupa]

Problem identified to pc_ble_driver_py being not avaialble for Mac Pro M1.

I checked https://pypi.org/project/pc-ble-driver-py/#files

There are no distribution files (.whl files) for AMD64 processors (Mac Pro M1) for  pc_ble_driver_py v0.16.1

I used another machine to get the job done.

Thanks for your help.

Treat this as closed.