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#73 : erik@... - 5 November 2019 : /g/nanovna-users/message/6495 Dear Erik, Thank you very much indeed for your interest in our work and also for the chance you give us to explain it

Hope someone can give me some insight on the TDR impedance measurement display. I have attached TDR impedance displays for two cable assemblies. The first cable assembly was made up of a 0.3m length

Thank you, that is usefull information for everyone! I haven't decided what to do. I might fix my nanoVNA, buy another or wait for the announced "nanoVNA 2.0". My version isn't completely dead but the

Eventually, but getting something built first in a "friendly" IDE, then whittling to fit, might be faster. Also, with Bluetooth, local display becomes highly optional.

Hello Erik, Now it works, see the attached diagram: NanoVNA_T-Check.png Thanks again for the very good spreadsheet. 73, Rudi DL5FA

Actually, read the whole thread, including /g/nanovna-users/message/1795 With all the features stuffed into the current firmware, builds are starting to overflow storage. You'll need

/g/nanovna-users/message/1508

Oops, just found this article: https://wonderfulengineering.com/10-best-bluetooth-modules-for-arduino/ .. which recommends HC-06: "use it simply for a serial port replacement" ~ US$1.40

I mean to rip the BT module out of the device... Also, I just had a quick look at the pin mapping of the F072 as used in the NanoVNA.? PINS 30 & 31 (not currently used) can be remapped to USART1_TX &

Hello Erik, Thank you very much for your provided spread sheet. At the moment I am still fighting with the decimal point/comma topic :-( 73, Rudi DL5FA

I do not find hacks turning ELM327 into BT bridge; cheap HC-05 has good Arduino support, https://components101.com/wireless/hc-05-bluetooth-module but wants substantial code. A "smart" BT LE shield is

Yes, but SPI to USB host would be simpler than trying to add Bluetooth to nanoVNA firmware https://www.amazon.com/dp/B01EWW9R1E

Actually, I was thinking a little more on what uses a serial to BT bridge: every one of those really cheap OBD2 BT car diagnostic readers has one built-in. Those readers cost $5 and up so the BT

Oristo, All Vaclav needs to do is use one of the unused serial ports on the chip and use a BT to serial module. I was looking at the F072 specs and it appears the serial pin I was thinking if using is

Hi Vaclav - Unless you find a Bluetooth dongle that supports USB OTG, I think that this is doomed. I found no 64-pin STM32 chip, as in nanoVNAs, that does USB OTG,

Herb, thanks very much. I assume the two devices are different enough that the manual for the smaller one will not be of help. I almost purchased the smaller one but thought why not get the larger

Attached spreadsheet contains the formula and you can paste your s2p file on the input tab -- Erik, PD0EK

This is sort of "bump" / dupe. Or more direct approach. Take your pick. This is NOT post for / to users of NanoVNA, This post is about NanoVNA operating / embedded software hacking. I am planning to

A quick note, for those running from the Python source: "scipy" is required for the TDR impedance measurement display, and you therefore need to install this, for example by re-running the "pip

Hello Bryan, I am trying to calculate the T-Check value from the NanoVNA-Saver .S2P file with LibreOffice Calc, but I did not got the T-Check formular adopted. This is already done in the attached