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I got brave and removed the cover.
Now I am looking at PCB with absolutely no identification.

Unauthorized clone or somebody not interested to advertise their work ?

Opened the "git" link and was looking for schematic...
That got me to another "git" site and the only thing I can identify for sure is the
STM32 processor....

I am not sure I should go to the "trouble" to post PCB picture here.

For now l am interested now to "hook up " bluetooth module to my hardware,
if that is even an option.

So I was looking for anything resembling input / output.

And I have I found two pins marked

SWDIO and SWCLK

Any guess what they are ?

Perhaps non customery designation for "2 wire I/O " - data and clock ?
I do not see any such signals on schematic.

Those are the debug pins. Look elsewhere for the UART port if you have one. May only be available on H4 version.
Gary
W9TD

Anne, please browse the forum's Wiki.?
There is alot of info there including the schematics for each revision of nanovna, H and H4.?
There also photos of various boards.?


On Thu., 8 Jul. 2021 at 6:53 p.m., Anne Ranch<anneranch2442@...> wrote: I got brave and removed the cover.
Now I am looking? at PCB with absolutely no identification.

Unauthorized clone or somebody not interested to advertise their work ?

Opened the "git" link and was looking for schematic...
That got me to another "git" site and the only thing I can identify for sure is the
STM32 processor....

I am not sure I should go? to the "trouble" to post? PCB picture here.

For now l? am interested now to "hook up " bluetooth module to my hardware,
if that is even an option.

So I was looking for anything resembling input / output.

And I have I found two pins marked

SWDIO and SWCLK

Any guess what they are ?

Perhaps non customery? designation for "2 wire I/O " - data and clock ?
I do not see any such signals on schematic.

On 7/8/21 6:07 PM, Larry Rothman wrote:

Anne, please browse the forum's Wiki.
There is alot of info there including the schematics for each revision of nanovna, H and H4.
There also photos of various boards.

ANd if you post a photo, someone might be able to ID it for you.

On Thu., 8 Jul. 2021 at 6:53 p.m., Anne Ranch<anneranch2442@...> wrote: I got brave and removed the cover.
Now I am looking? at PCB with absolutely no identification.

Unauthorized clone or somebody not interested to advertise their work ?

Opened the "git" link and was looking for schematic...
That got me to another "git" site and the only thing I can identify for sure is the
STM32 processor....

I am not sure I should go? to the "trouble" to post? PCB picture here.

For now l? am interested now to "hook up " bluetooth module to my hardware,
if that is even an option.

So I was looking for anything resembling input / output.

And I have I found two pins marked

SWDIO and SWCLK

Any guess what they are ?

Perhaps non customery? designation for "2 wire I/O " - data and clock ?
I do not see any such signals on schematic.

This is the last version (3.4) of the original NanoVNA-H with the 2.8 inch display.?
/g/nanovna-users/photo/0/34671.21928.0?p=Created,,,20,2,100,0
Folks - browse the forum's Photo section!? There is just as much info there as in the message area.?



On Thu., 8 Jul. 2021 at 9:11 p.m., Jim Lux<jim@...> wrote: On 7/8/21 6:07 PM, Larry Rothman wrote:

Anne, please browse the forum's Wiki.
There is alot of info there including the schematics for each revision of nanovna, H and H4.
There also photos of various boards.

ANd if you post a photo, someone might be able to ID it for you.

?
?
? ? On Thu., 8 Jul. 2021 at 6:53 p.m., Anne Ranch<anneranch2442@...> wrote:? I got brave and removed the cover.
Now I am looking? at PCB with absolutely no identification.

Unauthorized clone or somebody not interested to advertise their work ?

Opened the "git" link and was looking for schematic...
That got me to another "git" site and the only thing I can identify for sure is the
STM32 processor....

I am not sure I should go? to the "trouble" to post? PCB picture here.

For now l? am interested now to "hook up " bluetooth module to my hardware,
if that is even an option.

So I was looking for anything resembling input / output.

And I have I found two pins marked

SWDIO and SWCLK

Any guess what they are ?

Perhaps non customery? designation for "2 wire I/O " - data and clock ?
I do not see any such signals on schematic.

On Thu, Jul 8, 2021 at 11:53 PM, Anne Ranch wrote:

And I have I found two pins marked

SWDIO and SWCLK

Any guess what they are ?

Perhaps non customery designation for "2 wire I/O " - data and clock ?
I do not see any such signals on schematic.

SWDIO and SWCLK are the standard designations for the GPIO pins on STM devices. You seriously need to read up on these devices first.

On Fri, Jul 9, 2021 at 03:44 AM, Ronan Daly wrote:

You seriously need to read up on these devices first.

Let's be civilized and please do not tell me how serious I should be.

If it is NOT OK to asks here , please say so.

I am in "let's get to know nanoVNA " mode .
I cannot possibly know where to start so I will ask
silly questions.

After looking at wiki my next step is to take the display cover off , perhaps usable I/O
pins and PCB identification is there.

My current concern is - not to loose the black screws.

If somebody knows the size of these screws - please say so - but I can as Mrs Google , right?

OK, it is official - I own a piece on unidentifiable hardware.
It has two marked "px" pins
P1 whose labels are buried under battery plug
and P2 with addition to already mentioned pins contains pins marked
"GND" and "NRST" and something looking as "VD,,,"
After looking trhu wiri - as suggested here - I apparently , to no fault of mine ,
own " bad " or ever "more" bad clone.
And all I wanted to know if there are meas to connect directly
Bluetooth to it...
There are not , case closed.
PS I did manage to drop one of the screws, and it did not follow Murphy's law
to fall into most inaccessible place. Today is my lucky day .

Anne,

I thought your question to the forum was valid and interesting. Always a chance someone here has gone through exactly the same thing, and will get you a quick answer Glad you found the errant screw.

John,
wa3jrs

Meant to answer earlier but couldn't get into the shop due to carpet cleaning.

The screw threads are M2.5

73, Willie N1JBJ

Thanks for encouraging words and the screw size.
When I was studding electronic there was a joke, invented by folks who knew how much header was
going thru "mechanical engineering" faculty.
"how does electrical engineer determine screw size?"
" most of the time it is M3 , but if
M3 is too small than use M4 "

Works for me.


73

-Jim
NU0C

On Fri, 09 Jul 2021 19:19:31 -0700
"Anne Ranch" <anneranch2442@...> wrote:

"how does electrical engineer determine screw size?"
" most of the time it is M3 , but if
M3 is too small than use M4 "