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Re: NanoVNA software developers wanted #hacking
nRF52832-QFAA/QFN48 has 64KB RAM + 512KB flash ESP8266 reportedly has > 40KB heap+data space available. I guess HC-05/6 is unbuffered but also not BTLE, so less interesting for e.g. Web Bluetooth API
By Oristo · #6565 ·
NanoVNASaver QT Platform problem (won't load)
I've tried NanoVNASaver v0.1.3 and v0.1.4 but they will not start. I get a DOS window with the error message: "Could not load the Qt platform plugin "Windows" in "" even though it was found. This
By DougVL · #6564 ·
Re: NanoVNA software developers wanted #hacking
That is a lot of data to buffer. Firmware should sleep Bluetooth while sweeping and pause sweeps while Bluetooth is active.
By Larry Rothman · #6563 ·
Re: NanoVNA software developers wanted #hacking
Firmware should sleep Bluetooth while sweeping and pause sweeps while Bluetooth is active.
By Oristo · #6562 ·
Re: NanoVNA software developers wanted #hacking
Before adding a radio transmitter and a second microcontroller such as a HC-05 to the NanoVNA, you may want to examine how much RFI it might introduce into the NanoVNA. My experience with my VNA,
By Daniel Marks · #6561 ·
Re: Chasing ghosts??? #internals #calibration
RG-58 is just plain junk cable, and should never be used or (especially) trusted to yield meaningful results in any measurement situation. The center conductor flops around inside the shield at the
By Dana Whitlow · #6560 ·
Re: Chasing ghosts??? #internals #calibration
And here are the results. The first picture is with power level 3 when above 300MHz, second picture is with powerlevel is 0 for all frequencies. The noise is much higher with low power and that can be
By Erik Kaashoek · #6559 ·
Re: NanoVNA software developers wanted #hacking
I am a retired embedded processor engineer an can recommend the ESP32 programmed as a serial to bluetooth/WIFI adapter it is a 32 bit processor with the usual peripherals and both bluetooth and WiFi
By William Heller · #6558 ·
Re: T-Check for my nanoVNA - Results look excellent below 150 MHz and acceptable up to 300 MHz
Hi Rudi Super you are on the way now. I just did a T-Check for some N cal kit work presently working on and it was below 1 % all the way. That is the magic of 12 term error correction (actually 10
By Kurt Poulsen · #6557 ·
Re: NanoVNA software developers wanted #hacking
Link added in /g/nanovna-users/wiki/Mods-and-Design-Notes
By Oristo · #6556 ·
Re: Looking for firmware with battery indicator, 1500 and big font
Sorry, I'm not following the group regularly. Is there any firmware with battery indicator, 1500 MHz and big font ?
By Eko Wa · #6555 ·
Re: NanoVNA software developers wanted #hacking
I think that cho45 should disable Bluetooth during nanoVNA measurements to avoid both power and interference problems.
By Oristo · #6554 ·
Re: NanoVNA software developers wanted #hacking
Check out the work of cho45 will help you. https://lowreal.net/.page/20190905/3 hugen
By Hugen · #6553 ·
Re: T-Check for my nanoVNA - Results look excellent below 150 MHz and acceptable up to 300 MHz
Hello Kurt, This 'ListType=Lin' parameter was necessary :-) Question: where did you found that parameter 'ListType=Lin'? I looked in specification touchstone_ver2_0.pdf, and in VNWA_HELP_36.7.8.pdf
By Rudi · #6552 ·
Re: NanoVNA software developers wanted #hacking
Short note. All these links are either for Widoze or CLI or for yet another development tool besides Eclipse. But it does help to get some ideas. Thanks
By vaclav_sal <vaclav_sal@...> · #6551 ·
Re: NanoVNA software developers wanted #hacking
Nice, but I am after adding the bluetooth externally. Like to ask if it would make more sense to add processor internally supporting wireless commodification. I have not done any research if such
By vaclav_sal <vaclav_sal@...> · #6550 ·
Re: Voltage sensing diode
Just calibrated by setting vbat_offset so that the indicated voltage on the Version screen = measured battery voltage. Fully charged reading (LED1 not blinking) now 4140mV with vbat_offset set to 950.
By Nick · #6549 ·
Re: T-Check for my nanoVNA - Results look excellent below 150 MHz and acceptable up to 300 MHz
Hi Rudi Correct about R&S T-Check, no way to get it to run on W10 Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] <[email protected]> P? vegne af Kurt Poulsen
By Kurt Poulsen · #6548 ·
Re: T-Check for my nanoVNA - Results look excellent below 150 MHz and acceptable up to 300 MHz
Hi Rudi I did export a s2p file from latest version 1.5 of the NanoVNA-saver and it was imported right away in the VNWA It is in the format RI meaning real Imaginary S parameter so why you have no
By Kurt Poulsen · #6547 ·
Re: VBAT resistor voltage divider, polynomial fitting, VBAT sampling
Well...that's 3 for 3...thanks for taking the time to write and explain. -- On the banks of the Piscataqua Rich NE1EE
By Rich NE1EE · #6546 ·