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I wouldn't go that far. 8*) Sure, you _can_ assign I/O pins in software. However, that leads down the rathole of _both_ sides having to programmatically assign pins of Tx and Rx, and have potentially

Jos - please put a copy of your file into the forum's file section and create an entry in the Wiki, pointing to the file. Thanks!

I'm probably stupid, but for you Tx and Rx these are just labels next to contacts ... just labels, and you propose to programmatically change their meaning simply because you do not understand what it

For an interface that is so simple at some levels, over the past 50 years, I have had more problems with serial interfaces than any other.? Mostly because there's myriad ways its implemented and

calibrated using a 50 ohm BNC load, a BNC short, and left it open. Yes, if I were to tape the leads down, it would probably work better, but this was a first try at a "rough and ready" measurement I'm

Hello DiSlord, Gyula and all others, I finally succeeded to have my NanoVNA-H4 run under BlueTooth, thanks to your help. I have attached the procedure I used successfully, for those who are

BTW, the device does show up (at least on my Win7) device mgr.

They are NOT reversed, TX always means output and RX is always input - you should never connect output to output (possible damage) and input to input.

Thanks for the welcome and very helpful suggestions Larry. I followed your advice and found many great resources in the files section. With the advice from you and the file guides I updated the

Sorry for the wrong link, senior moment. Just been reaading the mail on th eorignal HC-05 "problem". One poster made a comment on Windoze response - "Coupled" . Never encountered such term in

How did you calibrate? If you keep clips at a fixed distance during calibration and measurement you will get better results. Roger

Or both.. They've gotten kind of expensive ($150 each, they used to be $50), but I've made lots of use of the Minicircuits ZX60-4016E for this kind of measurement, with suitable filters. 20M-4G, 18dB

Not to get into a discussion about "gain" for passive devices.. But Antenna Gain, in virtually all the literature, given with a reference (usually isotropic) means the relative far field intensity

Finding a random 100 5% ohm resistor (almost certainly film) in the junkbox, I measured it.. DC it's 98.3 ohms (on a 20 year old DMM that has never been recalibrated) Using a BNC to clips adapter, and

Without a balun, the coax shield is also part of the antenna. Got any Ferrite beads?? ?Big ones that you can slide over the coax, or?better yet some of the clip on ones often used on AC power

Thanks Larry. That is what I was hoping someone would advise! Best wishes, Roger

If you can flash and talk to the unit with the current driver's, don't change anything.? On Tue., 20 Jul. 2021 at 6:26 p.m., Roger<ve7vv@...> wrote: Hello, I have searched the site and did not

William, Try: https://content.instructables.com/ORIG/FQ1/CUVZ/HXA9PUVQ/FQ1CUVZHXA9PUVQ.pdf Don, K5DW

I recently built a 340 MHz dipole for test purposes. My NanoVNA-H4 was calibrated initially at the transmitter end of the coax cable. The first attachment shows the response of the antenna with

Hello, I have searched the site and did not find a relevant message for my question. I did connect the nanovna usb cable to the Win7 laptop before installing the new driver - which may have been a