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Android app cable not working!


 

Got the cable today, did NOT work. This is number two. This cable is
an OTG data cable USB-C (nanovna) ti Micro-USB (samsung android phone)

NanoVNA Web App from play store says "no device found" when press connect.

What the ^%$ to do now?

Shouldnt any OTG data cable work???

Any advice appreciated!

On Sun, Feb 16, 2020 at 4:06 PM Kayak via Groups.Io
<kayak1176@...> wrote:

Since my phone has a MicroUSB,. I just ordered this one. If it works, then
I may try to find a way to update the wiki (?) so others can have one to go
to directly.


USB C to Micro USB OTG Cable, CableCreation 0.65 ft Type C Braided Cord,
480Mbps Compatible with MacBook (Pro), Galaxy S8, S9, S10, Pixel 3 XL, 2
XL, Android Devices, 0.2M/ Space Gray


On Sun, Feb 16, 2020, 1:27 PM gary <w9td@...> wrote:

Yes, but I used this one


As it also can power the attached device (NanoVNA)





 

On Mon, Feb 17, 2020 at 07:10 AM, Kayak wrote:
" NanoVNA Web App from play store says "no device found" when press connect."
==========================================================

As I warned you in your previous thread, "the apk installation from the Playstore is experimental and may not detect the NanoVNA even if you have the proper cable. The Web client at usually connects and works, but you need to have internet access to use it."

The fact that you were able to download the app from Google Play Store means that your phone meets the version requirements, however; the app is imperfect (read experimental) and some phone models will not connect with it regardless. Short of using the Web client if you have internet access, you either need to change phones (not sure which models are guaranteed to work) or remotely connect using a PC. The app is a free user contribution and he is only able to test it on the configuration he owns. When it works it works, when it doesn't he pretty much responds that it is experimental.

I tried a number of Android phones and tablets with Android version 7 or greater. Most will connect using the Web client but only one android tablet was able to connect using the android app.

- Herb


 

Hi
When opening your link to the USB cable (s
ee copy below) in the German Amazon store it does NOT state "OTG" capability.
May that's helpful info?

USB C to Micro USB OTG Cable, CableCreation 0.65 ft Type C Braided Cord,
480Mbps Compatible with MacBook (Pro), Galaxy S8, S9, S10, Pixel 3 XL, 2
XL, Android Devices, 0.2M/ Space Gray


 

Thanks Herb I must have missed that. This time, I went to your web app
online with my samsung (j7 prime) and still "no compatible devices
found".. This is the cable (below):

I am not sure what to try next? pretty frustrating, because the phone
screen is much larger and I'd like to make use of it rather than the
nano screen, and the pc (which does connect, just confirmed that now
with nanovna saver) is not portable.



USB C to Micro USB OTG Cable, CableCreation 0.65 ft Type C Braided
Cord, 480Mbps Compatible with MacBook (Pro), Galaxy S8, S9, S10, Pixel
3 XL, 2 XL, Android Devices, 0.2M/ Space Gray

On Mon, Feb 17, 2020 at 11:36 AM hwalker <herbwalker2476@...> wrote:

On Mon, Feb 17, 2020 at 07:10 AM, Kayak wrote:
" NanoVNA Web App from play store says "no device found" when press connect."
==========================================================

As I warned you in your previous thread, "the apk installation from the Playstore is experimental and may not detect the NanoVNA even if you have the proper cable. The Web client at usually connects and works, but you need to have internet access to use it."

The fact that you were able to download the app from Google Play Store means that your phone meets the version requirements, however; the app is imperfect (read experimental) and some phone models will not connect with it regardless. Short of using the Web client if you have internet access, you either need to change phones (not sure which models are guaranteed to work) or remotely connect using a PC. The app is a free user contribution and he is only able to test it on the configuration he owns. When it works it works, when it doesn't he pretty much responds that it is experimental.

I tried a number of Android phones and tablets with Android version 7 or greater. Most will connect using the Web client but only one android tablet was able to connect using the android app.

- Herb



 

On Mon, Feb 17, 2020 at 09:07 AM, Kayak wrote:

I went to your web app online with my samsung (j7 prime) and still "no compatible devices found"
==============================================================

Kayak,
The Samsung (j7 prime) should at least work with the web app online.

These are the developer's instructions from :

1. Enable flag: chrome://flags/#enable-experimental-web-platform-features
2. Access to .
3. Connect your NanoVNA to USB port.
4. Click [CONNECT] and select the device.

- Herb


 

If your phone has a micro usb port then try an adapter like this one

I use a generic unbranded one that came with a chinese tablet and it works fine with my Galaxy S7.


 

On Mon, Feb 17, 2020 at 09:23 AM, Ronan Daly wrote:

" I use a generic unbranded one that came with a chinese tablet and it works fine with my Galaxy S7."
====================================================================================

Ronan,
Have you tried the NanoVNA app from the Google Play store with your S7? That would let Kayak know if he might expect the NanoVNA to work off-line with his j7 prime or not.

- Herb


 

Thank you, I wasn't enabling that flag (didnt see the documentation,
moving too fast and assumed the s/w would provide a dialog about any
settings, my bad)

So the flag is set in the android chrome, confirmed, restarted android
chrome, same error "No compatible devices found". I repeated the
process on a clean LG Aristo 2 phone, same result.

Now do you suppose I should consider a somehow incompatible cable?
Cant really be anything else that I know of. The port communicate with
the pc.

As recommended in the documentation on github (which I would probably
never have found) I ordered a OTG usb-c to usb A adapter cable. Chose
this one, amazon.com/Anker-Adapter-Converts-Technology-Compatible/dp/B01COOQIKU


Thanks for the replies and help. Got to be something simple here...

On Mon, Feb 17, 2020 at 12:21 PM hwalker <herbwalker2476@...> wrote:

On Mon, Feb 17, 2020 at 09:07 AM, Kayak wrote:

I went to your web app online with my samsung (j7 prime) and still "no compatible devices found"
==============================================================

Kayak,
The Samsung (j7 prime) should at least work with the web app online.

These are the developer's instructions from :

1. Enable flag: chrome://flags/#enable-experimental-web-platform-features
2. Access to .
3. Connect your NanoVNA to USB port.
4. Click [CONNECT] and select the device.

- Herb



 

On Mon, Feb 17, 2020 at 05:49 PM, hwalker wrote:


On Mon, Feb 17, 2020 at 09:23 AM, Ronan Daly wrote:

" I use a generic unbranded one that came with a chinese tablet and it works
fine with my Galaxy S7."
====================================================================================

Ronan,
Have you tried the NanoVNA app from the Google Play store with your S7?
That would let Kayak know if he might expect the NanoVNA to work off-line with
his j7 prime or not.

- Herb
Yes the app works fine.


 

As I understand this, if a cable can communicate the phone with a PC, it cannot be used with a phone. A "normal" cable is due for connecting the PC, as a host, with a peripheral, being it a disk, a phone or the nano. For using a phone as a host you must use an "On The Go" cable, that forces the phone to behave as a host, being the other side a disk or the nano to act as the peripheral.

For the guys that uses a TV dongle as a V-UHF receiver connected to a PC, there is an APP that works in a phone and in this case you also need to use an OTG cable.

Regards,

Ignacio EB4APL

El 17/02/2020 a las 19:06, Kayak escribi¨®:
Thank you, I wasn't enabling that flag (didnt see the documentation,
moving too fast and assumed the s/w would provide a dialog about any
settings, my bad)

So the flag is set in the android chrome, confirmed, restarted android
chrome, same error "No compatible devices found". I repeated the
process on a clean LG Aristo 2 phone, same result.

Now do you suppose I should consider a somehow incompatible cable?
Cant really be anything else that I know of. The port communicate with
the pc.

As recommended in the documentation on github (which I would probably
never have found) I ordered a OTG usb-c to usb A adapter cable. Chose
this one, amazon.com/Anker-Adapter-Converts-Technology-Compatible/dp/B01COOQIKU


Thanks for the replies and help. Got to be something simple here...

On Mon, Feb 17, 2020 at 12:21 PM hwalker <herbwalker2476@...> wrote:
On Mon, Feb 17, 2020 at 09:07 AM, Kayak wrote:

I went to your web app online with my samsung (j7 prime) and still "no compatible devices found"
==============================================================

Kayak,
The Samsung (j7 prime) should at least work with the web app online.

These are the developer's instructions from :

1. Enable flag: chrome://flags/#enable-experimental-web-platform-features
2. Access to .
3. Connect your NanoVNA to USB port.
4. Click [CONNECT] and select the device.

- Herb



 

I use a generic unbranded one that came with a chinese tablet and it works fine with my Galaxy S7.
---------------------------

Same with me. I used the charging cable that came with my Xiaomi Mi9, with the USB C connector connected to the NanoVNA, and the USB A connector connected to this adapter bought on Amazon (sorry, I do not have anymore the URL...). Worked at the first try. Android version is 9.





Alberto





--
/*73 Alberto I2PHD*
<<< >>>/


 

Here is my Willkac cable working with a Moto X to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD


 

weird. I just received my THIRD OTG adapter cable and two USB-A to
micro-USB cables, and tried the supposedly always-compatible nano web
version on the J7 Prime and the LG Aristo, no joy whatsoever. 'no
compatible device found' doesnt work in the app either.

Two apps
Three OTG adapter caboles
Two phones
Two USB cables

Zero luck.

On Tue, Feb 18, 2020 at 1:48 PM gary <w9td@...> wrote:

Here is my Willkac cable working with a Moto X to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD



 

Dumb question: have you tried using TeraTerm on a PC to talk to your Nano via the console?
If that works, then refer to the following thread and see if your phone can talk through a terminal app...
/g/nanovna-users/message/9978



On Tue, 18 Feb 2020 at 6:15 PM, Kayak<kayak1176@...> wrote: weird. I just received my THIRD OTG adapter cable and two USB-A to
micro-USB cables, and tried the supposedly always-compatible nano web
version on the J7 Prime and the LG Aristo, no joy whatsoever. 'no
compatible device found'? doesnt work in the app either.

Two apps
Three OTG adapter caboles
Two phones
Two USB cables

Zero luck.

On Tue, Feb 18, 2020 at 1:48 PM gary <w9td@...> wrote:

Here is my Willkac cable working with a Moto X? to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD



 

Before I go to that testing, my Windows 10 PC communicates fine with
the Nano using nanovnasaver...

but two android phones, three cables and using teh web app as well as
the android app, always the same "no device found" error.

On Tue, Feb 18, 2020 at 6:49 PM Larry Rothman <nlroth@...> wrote:

Dumb question: have you tried using TeraTerm on a PC to talk to your Nano via the console?
If that works, then refer to the following thread and see if your phone can talk through a terminal app...
/g/nanovna-users/message/9978



On Tue, 18 Feb 2020 at 6:15 PM, Kayak<kayak1176@...> wrote: weird. I just received my THIRD OTG adapter cable and two USB-A to
micro-USB cables, and tried the supposedly always-compatible nano web
version on the J7 Prime and the LG Aristo, no joy whatsoever. 'no
compatible device found' doesnt work in the app either.

Two apps
Three OTG adapter caboles
Two phones
Two USB cables

Zero luck.


On Tue, Feb 18, 2020 at 1:48 PM gary <w9td@...> wrote:

Here is my Willkac cable working with a Moto X to the nanoVNA. The X is running Android 7 and asks if the nanoVNA should be allowed to use the USB when it is connected. The NanoVNA app just works without fuss. Note that the Wiilkac cable is a standard type A USB 3 socket not type C.
Gary W9TD







 

two android phones, three cables and using the web app as well as
the android app, always the same "no device found" error.
Sadly, some Android devices for which OTG connects to e.g keyboards or flash drives
will not work with virtual COM port devices,
but you could also try nanoVNA with this Serial USB Terminal app using its CDC device setting


Generic OTG connection checker:


 

Kayak,
it seems to me, that you place the OTG adapter at the NanoVNA and not at the smartphone. Why do you need otherwise the"...USB-A to
micro-USB cables.."?
You need an OTG adapter plugged into the smartphone. The OTG adapter has a USB-A socket, into which you plug the USB-A to USB-C cable, which comes with the NanoVNA.

--
Joerg, EX-DB2OO


 

IIRC, the only difference in an OTG cable is a jumper between two pins of
the connector that plugs into the phone or tablet.

Mike N4MHO

On Wed, Feb 19, 2020 at 10:20 AM Joerg-ex DB2OO <exDB2OO@...> wrote:

Kayak,
it seems to me, that you place the OTG adapter at the NanoVNA and not at
the smartphone. Why do you need otherwise the"...USB-A to
micro-USB cables.."?
You need an OTG adapter plugged into the smartphone. The OTG adapter has a
USB-A socket, into which you plug the USB-A to USB-C cable, which comes
with the NanoVNA.

--
Joerg, EX-DB2OO




 

I just tested it successfully with a Galaxy S9 running Android 10 and the NanoVNA WebApp.
After you have connected the NanoVNA via USB OTG and the cable, that came with the NanoVNA, just start the App.
You will get a question, that needs to be confirmed.
Please see on the other picture the connections.

--
Joerg, EX-DB2OO


 

Yes, pins 4 & 5 are shorted on the micro USB to tell the phone or tablet to switch to host mode and supply 5V output.

On Wednesday, February 19, 2020, 2:50:02 p.m. GMT-5, Mike Murphree N4MHO <mike@...> wrote:

IIRC, the only difference in an OTG cable is a jumper between two pins of
the connector that plugs into the phone or tablet.

Mike N4MHO

On Wed, Feb 19, 2020 at 10:20 AM Joerg-ex DB2OO <exDB2OO@...> wrote:

Kayak,
it seems to me, that you place the OTG adapter at the NanoVNA and not at
the smartphone. Why do you need otherwise the"...USB-A to
micro-USB cables.."?
You need an OTG adapter plugged into the smartphone. The OTG adapter has a
USB-A socket, into which you plug the USB-A to USB-C cable,? which comes
with the NanoVNA.

--
Joerg, EX-DB2OO