cell phone / tablet USB host ?...

L

legg

Guest
Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL
 
legg <legg@nospam.magma.ca> wrote in
news:l8qvvg90aa541vdla966bv99k93mtj5o7j@4ax.com:

Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL
Click to expand...

Isn\'t a tab 8 about 8 years old?

Also some chip reader/usb port devices do not mandshake nicely in
every case.

As old as I remember those being, that may have been back in the
virus on a stick days. So they put extra security in. No connection
is as secure as it gets, eh?
 
On Sun, 06 Feb 2022 10:33:35 -0500, legg <legg@nospam.magma.ca> wrote:

Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?
Click to expand...

It is for USB. Devices are either controllers or targets (formerly
known as masters and slaves.)

Does anyone know of devices that can do both?

It\'s sad that USB was not designed as a real bus.

--

John Larkin Highland Technology, Inc trk

The cork popped merrily, and Lord Peter rose to his feet.
\"Bunter\", he said, \"I give you a toast. The triumph of Instinct over Reason\"
 
In article <l8qvvg90aa541vdla966bv99k93mtj5o7j@4ax.com>,
legg@nospam.magma.ca says...
Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL
Click to expand...

My smartphone requires \"OTG\" to be allowed in Settings/Additional
Settings. Get sane and RTFM...
 
On Sunday, February 6, 2022 at 8:22:04 AM UTC-8, John Larkin wrote:
On Sun, 06 Feb 2022 10:33:35 -0500, legg <le...@nospam.magma.ca> wrote:


Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?
It is for USB. Devices are either controllers or targets (formerly
known as masters and slaves.)

Does anyone know of devices that can do both?
Click to expand...

A true OTG device can do both. But implementing a true device is a different story.
 
On Sun, 6 Feb 2022 17:02:28 -0000, Mike Coon <gravity@mjcoon.plus.com>
wrote:

In article <l8qvvg90aa541vdla966bv99k93mtj5o7j@4ax.com>,
legg@nospam.magma.ca says...

Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL

My smartphone requires \"OTG\" to be allowed in Settings/Additional
Settings. Get sane and RTFM...
Click to expand...

You should see the manual and the \'settings\' window on this
thing (and what it doesn\'t include).

The OTG harness is here, but if the \'settings\' only allows
choice of USB transaction type and niether mentions hosting,
you\'re plumb out of luck.

Wrong toy for the job. Just had higher expectations (and those
were pretty low to begin with). Brought in just to cover a
simple bluetooth com app - figured I\'d see what it could
do with some ADC, thermometry, logging or SDR dongles -
for which hardware and apps are available for PC . . .
and for \'android\'.

Quad core ARM Cortex A35 ARMV7-A 64bit in a MediaTek SOC.
Android 7, last patched in 2019.

What\'s all this GooglePlay crap anyways? Do I really
want to know?

RL
 
søndag den 6. februar 2022 kl. 17.22.04 UTC+1 skrev John Larkin:
On Sun, 06 Feb 2022 10:33:35 -0500, legg <le...@nospam.magma.ca> wrote:


Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?
It is for USB. Devices are either controllers or targets (formerly
known as masters and slaves.)

Does anyone know of devices that can do both?
Click to expand...

those that are OTG (On The Go)

The end that has the extra ID pin (avalible on mini/micro/C) pulled
to ground becomes host, So you need a cable that has the right connections
 
søndag den 6. februar 2022 kl. 19.40.58 UTC+1 skrev legg:
On Sun, 6 Feb 2022 17:02:28 -0000, Mike Coon <gra...@mjcoon.plus.com
wrote:
In article <l8qvvg90aa541vdla...@4ax.com>,
le...@nospam.magma.ca says...

Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL

My smartphone requires \"OTG\" to be allowed in Settings/Additional
Settings. Get sane and RTFM...
You should see the manual and the \'settings\' window on this
thing (and what it doesn\'t include).

The OTG harness is here, but if the \'settings\' only allows
choice of USB transaction type and niether mentions hosting,
you\'re plumb out of luck.

Wrong toy for the job. Just had higher expectations (and those
were pretty low to begin with). Brought in just to cover a
simple bluetooth com app - figured I\'d see what it could
do with some ADC, thermometry, logging or SDR dongles -
for which hardware and apps are available for PC . . .
and for \'android\'.

Quad core ARM Cortex A35 ARMV7-A 64bit in a MediaTek SOC.
Android 7, last patched in 2019.

What\'s all this GooglePlay crap anyways? Do I really
want to know?
Click to expand...

it\'s where you download apps, equivalent to Apples App Store
 
On Sunday, February 6, 2022 at 7:33:28 AM UTC-8, legg wrote:
Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?
Click to expand...

USB was a master/slave \'bus\'. The master (host) was the sole source of
electrical power to run your mouse, keyboard, speaker, etc.
So, a master could charge a phone. The phone, on the other hand is
a slave (and thus won\'t try to provide regulated power on the bus).

OTG was the name of the change that made it possible to power a gizmo
from a phone, and it ONLY worked with micro-USB connector (they had to use an extra pin).
Maybe your Lenovo was not OTG-compatible, or maybe it has a bad extra pin. I\'ve been
able to use OTG-connect memory sticks with iPad and Android tablets, but there\'s some
wierdness (takes a special app on the iPad, and reformatting the stick is verboten).

What\'s the file system on the memory stick?
 
On Sun, 6 Feb 2022 10:46:21 -0800 (PST), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

søndag den 6. februar 2022 kl. 19.40.58 UTC+1 skrev legg:
On Sun, 6 Feb 2022 17:02:28 -0000, Mike Coon <gra...@mjcoon.plus.com
wrote:
In article <l8qvvg90aa541vdla...@4ax.com>,
le...@nospam.magma.ca says...

Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL

My smartphone requires \"OTG\" to be allowed in Settings/Additional
Settings. Get sane and RTFM...
You should see the manual and the \'settings\' window on this
thing (and what it doesn\'t include).

The OTG harness is here, but if the \'settings\' only allows
choice of USB transaction type and niether mentions hosting,
you\'re plumb out of luck.

Wrong toy for the job. Just had higher expectations (and those
were pretty low to begin with). Brought in just to cover a
simple bluetooth com app - figured I\'d see what it could
do with some ADC, thermometry, logging or SDR dongles -
for which hardware and apps are available for PC . . .
and for \'android\'.

Quad core ARM Cortex A35 ARMV7-A 64bit in a MediaTek SOC.
Android 7, last patched in 2019.

What\'s all this GooglePlay crap anyways? Do I really
want to know?

it\'s where you download apps, equivalent to Apples App Store
Click to expand...

Download? Where\'s the download option?
It\'s install or uninstall.

I\'d be happy to download and install it myself, though
this isn\'t as easy as it could be. Tablet couldn\'t
even see two .apk files in an APPS folder that I created
using usb file transfers from PC. Apparently the file
system partially mirrors itself without giving instructions
on navigating on one side or the other - can\'t get there
from here. Tap, Tap, Swipe, Swipe, Tap, Tap, TAP-TAP
Bloody TAP.

And what\'s this locating service that must be enabled
before an app will run? Not just enabled, but set to
High-Def (all com modes). And if it\'s so \'HighDef\',
then why does the tablet tell me that I\'m currently
located at the intersection of two parallel streets?
.. . . when I didn\'t even ask?

Ok , Ok, I\'ll wait till the right toy comes along.
Where are the junk shops when you need them?

RL
 
On Sun, 6 Feb 2022 11:40:46 -0800 (PST), whit3rd <whit3rd@gmail.com>
wrote:

On Sunday, February 6, 2022 at 7:33:28 AM UTC-8, legg wrote:
Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

USB was a master/slave \'bus\'. The master (host) was the sole source of
electrical power to run your mouse, keyboard, speaker, etc.
So, a master could charge a phone. The phone, on the other hand is
a slave (and thus won\'t try to provide regulated power on the bus).

OTG was the name of the change that made it possible to power a gizmo
from a phone, and it ONLY worked with micro-USB connector (they had to use an extra pin).
Maybe your Lenovo was not OTG-compatible, or maybe it has a bad extra pin. I\'ve been
able to use OTG-connect memory sticks with iPad and Android tablets, but there\'s some
wierdness (takes a special app on the iPad, and reformatting the stick is verboten).

What\'s the file system on the memory stick?
Click to expand...

They\'re all FAT-32

I haven\'t tried a powered usb bus port yet.
Lack of \'settings\' doesn\'t predict well.

We used to laugh at the \'help\' drop-down option
in MS OSs. Nothing to laugh at in this thing.

RL
 
søndag den 6. februar 2022 kl. 21.12.27 UTC+1 skrev legg:
On Sun, 6 Feb 2022 10:46:21 -0800 (PST), Lasse Langwadt Christensen
lang...@fonz.dk> wrote:

søndag den 6. februar 2022 kl. 19.40.58 UTC+1 skrev legg:
On Sun, 6 Feb 2022 17:02:28 -0000, Mike Coon <gra...@mjcoon.plus.com
wrote:
In article <l8qvvg90aa541vdla...@4ax.com>,
le...@nospam.magma.ca says...

Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?

RL

My smartphone requires \"OTG\" to be allowed in Settings/Additional
Settings. Get sane and RTFM...
You should see the manual and the \'settings\' window on this
thing (and what it doesn\'t include).

The OTG harness is here, but if the \'settings\' only allows
choice of USB transaction type and niether mentions hosting,
you\'re plumb out of luck.

Wrong toy for the job. Just had higher expectations (and those
were pretty low to begin with). Brought in just to cover a
simple bluetooth com app - figured I\'d see what it could
do with some ADC, thermometry, logging or SDR dongles -
for which hardware and apps are available for PC . . .
and for \'android\'.

Quad core ARM Cortex A35 ARMV7-A 64bit in a MediaTek SOC.
Android 7, last patched in 2019.

What\'s all this GooglePlay crap anyways? Do I really
want to know?

it\'s where you download apps, equivalent to Apples App Store
Download? Where\'s the download option?
It\'s install or uninstall.
Click to expand...

sure, and install obviously downloads first
 
Ed Lee <edward.ming.lee@gmail.com> wrote in news:b3d46de3-2da8-478c-
aaa8-c29fda25fd82n@googlegroups.com:

> But implementing a true device is a different story.

Yeah... look what happened to you.

No truth there.

Another retarded Lee crack from his lower Le Crack.
 
On Sunday, February 6, 2022 at 1:14:17 PM UTC-8, DecadentLinux...@decadence.org wrote:
Ed Lee <edward....@gmail.com> wrote in news:b3d46de3-2da8-478c-
aaa8-c29f...@googlegroups.com:
But implementing a true device is a different story.
Yeah... look what happened to you.

No truth there.

Another retarded Lee crack from his lower Le Crack.
Click to expand...

Silly.
 
On 2022-02-06, John Larkin <jjlarkin@highlandtechnology.com> wrote:
On Sun, 06 Feb 2022 10:33:35 -0500, legg <legg@nospam.magma.ca> wrote:


Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

It is for USB. Devices are either controllers or targets (formerly
known as masters and slaves.)

Does anyone know of devices that can do both?
Click to expand...

It\'s called \"USB on the go\" and is fairly common in portable devices.
such devices will have an mini or micro AB shaped socket, (or more recently many have C)

--
Jasen.
 
On 7/2/22 2:33 am, legg wrote:
Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?
Click to expand...

I have a Lenovo TB-850SF with Android 10 and it has no problem reading
USB memory sticks. I don\'t recall having to enable anything.

Google doesn\'t like local file transfers, because that enables you to
manage content they can\'t spy on. That can be the only explanation for
why they haven\'t put an SMB server into Android, and all the standard
file transfer apps are so crap.
 
On Sunday, February 6, 2022 at 2:00:25 PM UTC-8, Clifford Heath wrote:
On 7/2/22 2:33 am, legg wrote:
Recent experience (first) with a Lenovo Tab 8
had me scratching my head.

It\'s USB (~charging) port could communicate with a
PC for file transfer, but couldn\'t read a memory stick.
This with all the recommended OTG cabling.

Why would you stick a communicative USB port on a
battery-operated device and then restrict it from
acting as a USB host?

Is this normal?

Is this sane?

I know there are a multitude of other methods of
com available for these devices, but why not
simple USB stick transfer?
I have a Lenovo TB-850SF with Android 10 and it has no problem reading
USB memory sticks. I don\'t recall having to enable anything.

Google doesn\'t like local file transfers, because that enables you to
manage content they can\'t spy on. That can be the only explanation for
why they haven\'t put an SMB server into Android, and all the standard
file transfer apps are so crap.
Click to expand...

That doesn\'t make sense. You can do any file transfer with a PC and slave Android.
I prefer to transfer from PC anyway, even will another USB stick on the PC.
 
On Sunday, February 6, 2022 at 2:06:12 PM UTC-8, Ed Lee wrote:
On Sunday, February 6, 2022 at 2:00:25 PM UTC-8, Clifford Heath wrote:

Google doesn\'t like local file transfers, because that enables you to
manage content they can\'t spy on. That can be the only explanation for
why they haven\'t put an SMB server into Android, and all the standard
file transfer apps are so crap.

That doesn\'t make sense. You can do any file transfer with a PC and slave Android.
I prefer to transfer from PC anyway, even will another USB stick on the PC.
Click to expand...

Oh, it makes sense, all right. You can\'t install an application with \'file transfer\'
because you can\'t access the directory where apps reside. You can\'t even inspect
the filesystem except within a walled-off area (try, for instance, to find a fonts
folder, or a picture file from a text message).

Maybe there\'s developer tools that can explore the walled garden...
 
On Sunday, February 6, 2022 at 3:16:27 PM UTC-8, whit3rd wrote:
On Sunday, February 6, 2022 at 2:06:12 PM UTC-8, Ed Lee wrote:
On Sunday, February 6, 2022 at 2:00:25 PM UTC-8, Clifford Heath wrote:

Google doesn\'t like local file transfers, because that enables you to
manage content they can\'t spy on. That can be the only explanation for
why they haven\'t put an SMB server into Android, and all the standard
file transfer apps are so crap.

That doesn\'t make sense. You can do any file transfer with a PC and slave Android.
I prefer to transfer from PC anyway, even will another USB stick on the PC.
Oh, it makes sense, all right. You can\'t install an application with \'file transfer\'
because you can\'t access the directory where apps reside. You can\'t even inspect
the filesystem except within a walled-off area (try, for instance, to find a fonts
folder, or a picture file from a text message).

Maybe there\'s developer tools that can explore the walled garden...
Click to expand...

You can do it all with rooted device. The protection is for accidental messing up of files, just like a typical Linux system.
 
On Sunday, February 6, 2022 at 3:22:52 PM UTC-8, Ed Lee wrote:
On Sunday, February 6, 2022 at 3:16:27 PM UTC-8, whit3rd wrote:
On Sunday, February 6, 2022 at 2:06:12 PM UTC-8, Ed Lee wrote:
On Sunday, February 6, 2022 at 2:00:25 PM UTC-8, Clifford Heath wrote:

Google doesn\'t like local file transfers, because that enables you to
manage content they can\'t spy on. That can be the only explanation for
why they haven\'t put an SMB server into Android, and all the standard
file transfer apps are so crap.

That doesn\'t make sense. You can do any file transfer with a PC and slave Android.
I prefer to transfer from PC anyway, even will another USB stick on the PC.
Oh, it makes sense, all right. You can\'t install an application with \'file transfer\'
because you can\'t access the directory where apps reside. You can\'t even inspect
the filesystem except within a walled-off area (try, for instance, to find a fonts
folder, or a picture file from a text message).

Maybe there\'s developer tools that can explore the walled garden...
You can do it all with rooted device. The protection is for accidental messing up of files, just like a typical Linux system.
Click to expand...

By the way, why can\'t you install apps or transfer files with ADB (Android Debugger)? ADB will take care of all the details without rooting (by-passing security) the device. And if you must root it, be sure to turn off the cell radio, or your phone is wide open to Russa, China, Iran, N. Korea, etc.. There are reasons for the phone\'s tight security.
 
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