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Mike, The error message means, as Hugen wrote, that you need to update the NanoVNA firmware because the software you were using did not recognize the command. So the firmware has not been updated for

I was using NanoVNA-Saver to try to use the VNA on my computer. I have since learned that it is probably less hassle to just use the NanoVNA. Thanks for the response and I have a very bad habit of

I have about 100 used CGM I've absconded from my wife's bi-weekly usage (diabetic). TI has all sorts of info on line free for the downloading. See the pic attached for a sample. I can give out several

Hi, This is a true case of one market segment impinging on another. For years,there has been a market push for faster SD cards with higher capacities for cameras or phones, for example. Many

You should tell us what you were doing at the time, and how. This looks like you were connecting with some desktop software, probably over USB, but we are guessing.

I received a similar email about a blog entry I made about the H4 I picked up. I updated the link to refer to the place I purchased it, rather than nanovna.com, but I'm not sure if that was even

Please update the firmware of your nanovna. https://nanovna.com/?page_id=103

In fact nanorfe violates the GPL license and publishes a lot of false information, please remember that nanovna.com is the only legitimate website.

Andreja, Thanks for the info. Seems like it might be useful to link to both of them. Russ, K5TUX

Well, the short story is that it's not as bogus as it seems, but it also gets really messy really quickly. Basically, there was the "original" version of the NanoVNA by Edy55 , and after some time, a

Tim, please search this forum for "SD card". You will find many users have had the same issue, with many responses given. The bottom line is that not all SD cards are compatible with the nanovna, and

Hello I have installed a micro sd card in my NanoVNA-H 4 and when I try to save a screenshot, I get a message: fail write. This is a new 32gb sd card and it shows as fat 32 when I read it in Windows

first time trying to use the nanovna H4. Not sure how to correct this error. Any help would be greatly appreciated.

I'm assuming this is bogus but could someone confirm the legitimate site for NanoVNA? From edelswartz123@...: Hi, I just noticed the "NanoVNA" link on your page:

Hello tjackson382000. 10 inches is a stretch for ISO15693, but out of the question for ISO14443. I like the Feig CPR74, which puts out 250 mW. It's a module with onboard antenna and a u.fl for

In the early days right "off The Hill" we had both 915 MHz and 2.45 GHz passive (beam powered) and active (coin battery) tags. The present-day SAW RFID tags are beam "powered". That was developed

It is no problem to read 10" with 125 KHz or 13.56 MHz, but you'll need large antennas. I'm not aware of any (passive) 2.45 GHz RFID system on the market now. Had a Motorola system long time ago.

There are a variety of apps for phones that will interrogate the card and read it back. You can watch the activity on the TinySA.

Bob Witte wrote the referenced book due to the requirement of EMC testing. Any accredited lab must present measurement uncertainty of the lab in any RE test report. Without that, the report is not

Frank: Thanks for the tip about Bob Witte’s books. Chuck KF8TI