Maybe this will help:
All HC BT modules require that you set their parameters
via AT commands. You can find guides on how to do that online.
Power the module and connect to it
via a serial port. Set the required parameters.
Use another instance of serial terminal to connect via BT and
check if the loopback communication works: You type something in
on the terminal connected over BT and it appears on the terminal
connected via serial.
Only then can you be sure that your HC module is working properly.
Connect the module to the Nano and proceed as it was already
described by others.
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On Mon, 19 Jul 2021 at 16:13, DiSlord <dislordlive@...> wrote: I not remember how hc5 work, need connect and see.
About speed, exist some steps
Soft send data to BT transmiter (speed set in soft, this speed set in
NanoVNA-App). This speed can be any
BT transmiter send to hc5 over BT (speed not allow select, depend from
signal level, noise and so).
Hc5 send data to NanoVna to serial port.
This speed programmed in Hc5 and need select in NanoVna.
You can check correct hc5 work, connect rx and tx pin on it, and power on.
Use any terminal soft, send data and if all correct you receive echo (data
sended to hc5)
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Re: Resistor measurements
A side note here. For a geezer whose background extends back into the tube era, er, valve era, the expression "carbon composition" brings to mind the matter of stability. Some users on this list may be attempting precise, repeatable, measurements with jigs. Those users should be aware that carbon composition resistors, in the past, could not be trusted to hold their value. They demonstrated a very distinct drift toward a higher value. The drift could be rapid. That change in value occurred not just in the hard service seen in tube circuits but while brand new and sitting in a parts drawer. In our ignorance, we used to conjecture that the material, compressed during manufacture, was expanding minutely over time and so causing a drift to higher resistance. If relaxation of the compressed material is really the issue, then it would be reasonable that there would be a change in reactance, too. John, at radio station VE7AOV +++++ On 2021-07-18 9:09 a.m., Roger Need via groups.io wrote: An interesting discussion about lead inductance and shunt capacitance of carbon composition, carbon film and high wattage carbon resistors in this article by Bob Botos of HP.
Roger
...
--
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I not remember how hc5 work, need connect and see.
About speed, exist some steps
Soft send data to BT transmiter (speed set in soft, this speed set in NanoVNA-App). This speed can be any
BT transmiter send to hc5 over BT (speed not allow select, depend from signal level, noise and so).
Hc5 send data to NanoVna to serial port.
This speed programmed in Hc5 and need select in NanoVna.
You can check correct hc5 work, connect rx and tx pin on it, and power on. Use any terminal soft, send data and if all correct you receive echo (data sended to hc5)
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No - the HC05 uses 3 volt levels (LVTTL) on its IO pins.
The voltage range definition of RS232 is +- 5v to +- 25 v.
Nowadays, about all modules are LVTTL if not otherwise specified.
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On Monday, July 19, 2021, 8:56:52 a.m. EDT, davebb123456 <davidbrowne76@...> wrote: Is it that the hc5 needs rs232 level and the nanovna is TTL level you may need a level converter maxim 232, Dave 2E0DMB On Sun, 18 Jul 2021, 21:19 Torbj?rn Toreson, <torbjorn.toreson@...> wrote: Hello,
I have installed a HC-05 bluetooth module in my NanoVNA-H4 (board v4.2).
Since connection pad P3 says UART_TX and UART_RX I connected the TX and RX
from HC-05 that way. I can not get any connection, I tried to reverse RX
and TX but that did not help, and should not. I am using Dislords FW
version 1.0.64 and I set Connection to Serial and Serial Speed to 38400
(also tried other speeds with corresponding change for the COM-port). I
have connected the HC-05 in my Win10 PC and initialized an outgoing
COM-port (HC-05 SPP Dev). I set the speed for the COM-port to 38400. No
function. I have also tried Windows original installation which gives two
COM-ports, out and in, and used the out-port (also tried the other but that
would be wrong). The HC-05 flashes red as it should. What happens in
NanoVNA App is that it shows connected briefly then disconnected. Using
Tera Term VT and setting the out com-port and serial speed 38400 gives a
terminal window that does not accept any input, some letters are accepted
but I can not type a complete console command (as I can with USB-cable
connection), some letters are displayed as figures. I have tried to disable
the FIFO-buffer for the COM-port, but that does not help. Now I have run
out of ideas so any help would be gratefully received. I know that some of
you have succeeded. I have followed the previous thread on the same subject
to no avail.
73/Torbj?rn
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Almost nothing uses RS-232 levels any more, all of these modules are TTL or 0-3.3V or (probably CMOS) inputs that take logic levels of some kind.
73, Willie N1JBJ
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On Jul 19, 2021, at 8:56 AM, davebb123456 <davidbrowne76@...> wrote:
Is it that the hc5 needs rs232 level and the nanovna is TTL level you may
need a level converter maxim 232,
Dave 2E0DMB
On Sun, 18 Jul 2021, 21:19 Torbj?rn Toreson, <torbjorn.toreson@...>
wrote:
Hello,
I have installed a HC-05 bluetooth module in my NanoVNA-H4 (board v4.2).
Since connection pad P3 says UART_TX and UART_RX I connected the TX and RX
from HC-05 that way. I can not get any connection, I tried to reverse RX
and TX but that did not help, and should not. I am using Dislords FW
version 1.0.64 and I set Connection to Serial and Serial Speed to 38400
(also tried other speeds with corresponding change for the COM-port). I
have connected the HC-05 in my Win10 PC and initialized an outgoing
COM-port (HC-05 SPP Dev). I set the speed for the COM-port to 38400. No
function. I have also tried Windows original installation which gives two
COM-ports, out and in, and used the out-port (also tried the other but that
would be wrong). The HC-05 flashes red as it should. What happens in
NanoVNA App is that it shows connected briefly then disconnected. Using
Tera Term VT and setting the out com-port and serial speed 38400 gives a
terminal window that does not accept any input, some letters are accepted
but I can not type a complete console command (as I can with USB-cable
connection), some letters are displayed as figures. I have tried to disable
the FIFO-buffer for the COM-port, but that does not help. Now I have run
out of ideas so any help would be gratefully received. I know that some of
you have succeeded. I have followed the previous thread on the same subject
to no avail.
73/Torbj?rn
|
Is it that the hc5 needs rs232 level and the nanovna is TTL level you may need a level converter maxim 232, Dave 2E0DMB On Sun, 18 Jul 2021, 21:19 Torbj?rn Toreson, <torbjorn.toreson@...> wrote: Hello,
I have installed a HC-05 bluetooth module in my NanoVNA-H4 (board v4.2).
Since connection pad P3 says UART_TX and UART_RX I connected the TX and RX
from HC-05 that way. I can not get any connection, I tried to reverse RX
and TX but that did not help, and should not. I am using Dislords FW
version 1.0.64 and I set Connection to Serial and Serial Speed to 38400
(also tried other speeds with corresponding change for the COM-port). I
have connected the HC-05 in my Win10 PC and initialized an outgoing
COM-port (HC-05 SPP Dev). I set the speed for the COM-port to 38400. No
function. I have also tried Windows original installation which gives two
COM-ports, out and in, and used the out-port (also tried the other but that
would be wrong). The HC-05 flashes red as it should. What happens in
NanoVNA App is that it shows connected briefly then disconnected. Using
Tera Term VT and setting the out com-port and serial speed 38400 gives a
terminal window that does not accept any input, some letters are accepted
but I can not type a complete console command (as I can with USB-cable
connection), some letters are displayed as figures. I have tried to disable
the FIFO-buffer for the COM-port, but that does not help. Now I have run
out of ideas so any help would be gratefully received. I know that some of
you have succeeded. I have followed the previous thread on the same subject
to no avail.
73/Torbj?rn
|
Jos Stevens
1:45pm #23413
Yes connection was set to "Serial" and I tried 38400 and 115200 both in nanovna as well in NanoVNA-App.
In the device manager COM6 is set to 9600.
Also tried pressing the button on the HC05.
Led on HC05 is stays flashing quickly all the time.
Jos
"In the device manager COM6 is set to 9600."
Set it in the device manager: click on the given port and then on the 'Set Port' tab in the next window, here change the speed to what you set on the NanoVNA.
--
*** If you are not part of the solution, then you are the problem. ( ) ***
|
It appears you didn't read my instructions in the zip file.
You need to install the ORIGINAL DfuSeDemo software and only then, swap the DfuSeDemo.exe? file located in the bin folder? (C:\Program Files (x86)\STMicroelectronics\Software\DfuSe v3.0.6\Bin) with the one I modified.
You cannot run my modded exe by itself.
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On Monday, July 19, 2021, 3:21:47 a.m. EDT, David J Taylor via groups.io <david-taylor@...> wrote: On 18/07/2021 21:31, Larry Rothman wrote: No attachment.? I assume it's a checksum type error?
There is nothing to install. All you need to do is replace the original exe with my modded one. There was an attachment - see: ? /g/nanovna-users/attachment/23396/0It shows STDFU.dll to be missing. David -- SatSignal Software - Quality software for you Web: Email: david-taylor@... Twitter: @gm8arv
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I tried to connect with Teraterm, it fails as well, will keep searching.
Jos
Op 19-7-2021 om 13:18 schreef DiSlord:
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I tried both speeds How you select connection speed?
In NanoVNA-App?
Need on NanoVNA select CONFIG-CONNECTION->SERIAL (default connection use USB)
And select correct speed in SERIAL SPEED submenu
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|
Why wouldn't you try a common speed for both ends?
73, Willie N1JBJ
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On Jul 19, 2021, at 7:45 AM, Jos Stevens <jrs@...> wrote:
tried 38400 and 115200 both in nanovna as well in NanoVNA-App.
In the device manager COM6 is set to 9600.
|
Yes connection was set to "Serial" and I tried 38400 and 115200 both in nanovna as well in NanoVNA-App.
In the device manager COM6 is set to 9600.
Also tried pressing the button on the HC05.
Led on HC05 is stays flashing quickly all the time.
Jos
Op 19-7-2021 om 13:18 schreef DiSlord:
toggle quoted message
Show quoted text
I tried both speeds How you select connection speed?
In NanoVNA-App?
Need on NanoVNA select CONFIG-CONNECTION->SERIAL (default connection use USB)
And select correct speed in SERIAL SPEED submenu
--
Dit e-mailbericht is gecontroleerd op virussen met Avast antivirussoftware.
|
I tried both speeds How you select connection speed? In NanoVNA-App? Need on NanoVNA select CONFIG-CONNECTION->SERIAL (default connection use USB) And select correct speed in SERIAL SPEED submenu
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I have the same problem !
I have let Windows 10 search for a? new Bluetooth device , it found the HC05,? I had to input code 1234 to let Windows connect to the HC05.
Then Windows reported "Coupled"? and in Window's device manager it showed up as "COM 6" (Bluetooth device RFcom (Protocol TDI).
i started NanoVNA-App , it showed C OM 6 but would NOT connect to it.
I tried both speeds.
Jos
Op 18-7-2021 om 22:46 schreef DiSlord:
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Show quoted text
You configure HC-05 module?
Some of them have default 115200 speed, some 38400
Board Tx connect to HC-05 Rx
Board Rx connect to HC-05 Tx
On NanoVNA need select CONFIG-CONNECTION->SERIAL (default connection use USB)
And select correct speed in SERIAL SPEED submenu
--
Dit e-mailbericht is gecontroleerd op virussen met Avast antivirussoftware.
|
Hello Anne,
Yes my Win10 OS does find the HC-05 as a Bluetooth device. If You need info to asign COM-ports to it just ask. The HC-05 is always discoverable. The button is to change from data mode to command mod for the HC-05. More info on this link:
73/Torbj?rn
PS. Gyula: I know, but I will see if it is disturbing up to VHF only. Putting the module inside is so far an experiment.
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19 juli 2021 kl. 03:49 skrev Anne Ranch <anneranch2442@...>:
Does your OS "finds" the HC-05?
I gave wired mine to "Little wire" - just to power it up - no other connections.
The RED LED on HC-05 flashes and my Ubuntu OS finds the HC-05 and identifies it as such.
Bluetooth in general is little hard to work with - one never knows if it is setup as "discoverable".
If the LED does not flash - there is a button on (my ) HC-05 , maybe you can use it to wake it up.
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Hi Torbj?rn,
I have a comment about the photo.
It is not recommended to insert the HC-05 (or any other type) into the device. On the other hand, the preferred solution is to plug the required connection points into a socket and plug the module into this socket when you want to use it. The proximity of the wifi module can cause interference in the NanoVNA and you will see erroneous measurements.
Just a suggestion, the decision is yours.
73, Gyula HA3HZ
--
*** If you are not part of the solution, then you are the problem. ( ) ***
|
On 18/07/2021 21:31, Larry Rothman wrote: No attachment.? I assume it's a checksum type error?
There is nothing to install. All you need to do is replace the original exe with my modded one. There was an attachment - see: /g/nanovna-users/attachment/23396/0It shows STDFU.dll to be missing. David -- SatSignal Software - Quality software for you Web: Email: david-taylor@... Twitter: @gm8arv
|
Roger, Jim - Thanks for the replies. The remotely operated coax switch at the antenna sounds like a great idea. Enjoyed seeing the attachments.
I have two experimental HF antennas where it is quite easy to bring the other end of the coax cable into the house. I did that recently to measure the cable loss over a 1-30 MHz frequency range.
This week I hope to do a calibration at the end of the transmission line on at least one of those antennas.
Last week I calibrated a 350 MHz indoor test antenna at the end of the coax and it made a big difference. When calibrating at the transmitter end and doing a wide frequency sweep, a lot of peaks and valleys would show up especially above the resonant frequency. The transmission line was a half wavelength at 24 MHz and there were half wave effects from frequencies that were multiples of 24 MHz. The same thing could occur with HF antennas with long feed lines. Increasing the length of a feed line lowers the frequency where it becomes a half wavelength.
73, Kent
AA6P
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On 7/18/21 4:24 PM, Roger Need via groups.io wrote: On Sun, Jul 18, 2021 at 04:14 PM, Kent AA6P wrote:
There has been discussion about calibrating at the transmitter end of the
transmission line. Is anyone doing the calibration at the antenna end of the
transmission line?
It might be interesting to see the Smith Chart and SWR plot right at the
antenna terminals. I have two HF antennas with easy access to the ends of the
coax cables. A different set of calibration standards or adapters may be
required.
73, Kent
AA6P
On several occasions I have done the calibration at the end of the transmission line where it connects to the antenna. It works very well but requires a lot of running back and forth between the antenna and the ham shack. hence the switch box <grin>? - It's having an Ecal unit out there.
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On 7/18/21 4:14 PM, Kent AA6P wrote: There has been discussion about calibrating at the transmitter end of the transmission line. Is anyone doing the calibration at the antenna end of the transmission line?
It might be interesting to see the Smith Chart and SWR plot right at the antenna terminals. I have two HF antennas with easy access to the ends of the coax cables. A different set of calibration standards or adapters may be required.
7 I'm doing exactly that. I have a RCS-8V switch box at the antenna end with a short and a load hooked up, so I can do a cal, remotely. cables is the response of the cables, with the calibration at the VNA.? new and old refer to a pair of antennas. newantenna.png is one of the antennas (new) with the "calibration at VNA"? blue trace is without moving the cal to the end, orange trace is with the cal at the end.
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On Sun, Jul 18, 2021 at 04:14 PM, Kent AA6P wrote:
There has been discussion about calibrating at the transmitter end of the
transmission line. Is anyone doing the calibration at the antenna end of the
transmission line?
It might be interesting to see the Smith Chart and SWR plot right at the
antenna terminals. I have two HF antennas with easy access to the ends of the
coax cables. A different set of calibration standards or adapters may be
required.
73, Kent
AA6P
On several occasions I have done the calibration at the end of the transmission line where it connects to the antenna. It works very well but requires a lot of running back and forth between the antenna and the ham shack. Roger
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Gyula Molnar
David J Taylor
Roger Need