"I have different problems with every version tried.
For using nanoVNA standalone,
I install Hugen's most recent AA dfu version from here:
When I fist saw that _AA_ version I thought that a 274kb file would not fit on a 128kb device! I am familiar with Arduino process where we upload .hex files with an AVR programmer so was drawn to that file first. Looking at the manual section 8, I see that I need dfu-utils, which is available in Ubuntu so I can download that and use the .dfu file when a new update is released. For now, since my device has been supplied with the most recent version, I see no reason to change the firmware yet. However, what is the difference between the _AA_version and the non-_AA_ version?
"the file name is "nanovna-saver.py". So the error you got seems to have
been because you tried to run a file that did not exist?"
Yes, absolutely, which suggests that the first time with the python-numpy package installed, the installer did not complete correctly. The second time with python3-numpy installed evidently it did. But that didn't get rid of the "bdist_wheel" problem.
Sorry, I had listed all of the commands in my post but a copy and paste error meant that I had to re-type everything in haste. I basically followed the readme exactly. Here are the steps:
- unpack the .tar.gz file into a directory
- enter the directory
- check all dependencies are present
$ sudo apt install python3.7 python3-pip
$ python3.7 -m pip install .
Once completed:
$ python3.7 nanovna-saver.py
These were present:
* `python3-serial`
* `python3-pyqt5`
This one does not exist:
* `numpy`
However, python-numpy exists, and I installed python3-numpy for good measure.
"I would also suggest you are too close to the antenna you are trying to
test. With a 20cm cable your body is very close. If you are also testing
indoors it can also scew your results."
The guy in the video connected the antenna directly to the SMA connector and had his hands onver the antenna as well as the nanoVNA yet (apparently) had no problems. Maybe some creative editing? I am testing indoors and both antenna and nanoVNA are close to me. I found that if I take note of where the peak is when my hand is away from the unit and then move the marker to approximately that point on the screen and then move my hand away to see here it landed, then eventually with two or three more corrections it I can get the marker pretty close to spot on.
I had a closer loor at the unit today. Its seems that the front and back are not made of metal as I had thought, but of thin PCB material. The corners have plated through holes, but there doesn't seem to be any metal layer across the board, so reaaly, there is no outer shielding. The 4 screw mounts are not connected to the ground plane either so any shielding would not have been electically connected anyway. Is this intended by design? I notice that the more expensive version in the black box appears to come in a plastic case?
