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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   N900 will not allow USB OTG! (https://talk.maemo.org/showthread.php?t=31921)

allnameswereout 2009-10-02 15:27
Re: N900 will not allow USB OTG!
 
Quote:
Originally Posted by debernardis (Post 338209)
I just received my Mobidapter but it seems that the microsd slot of the E51, even if positioned on the side of the device, is too deep, and the adapter can't reach its contacts:mad::mad::mad:

I'll have to find a solution for that :mad:
At present, they are 40 Eur thrown away.
Well, maybe I'll be able somewhat to attach a flat cable and use it with the N900 :confused:
:confused: you can send it back and then you only lost S&H cost.

debernardis 2009-10-02 16:01
Re: N900 will not allow USB OTG!
 
Quote:
Originally Posted by allnameswereout (Post 338255)
:confused: you can send it back and then you only lost S&H cost.
No, I'll rather try to hack it, it's more fun. I don't think it's too difficult to solder a flat cable to the contacts; on the opposite end, maybe I should use a small pcb, cut in the shape of a microsd. This way, it could allow me to connect a usb thumb drive to the n900.

allnameswereout 2009-10-02 17:07
Re: N900 will not allow USB OTG!
 
Quote:
Originally Posted by debernardis (Post 338273)
No, I'll rather try to hack it, it's more fun. I don't think it's too difficult to solder a flat cable to the contacts; on the opposite end, maybe I should use a small pcb, cut in the shape of a microsd. This way, it could allow me to connect a usb thumb drive to the n900.
Fair enough, but you cannot get your cake both ways. Either its 40 EUR wasted or its 40 EUR invested on a hack project. ;) (interesting you're onto it though!)

debernardis 2009-10-02 17:55
Re: N900 will not allow USB OTG!
 
1 Attachment(s)
Instead, it seems they're really 40 Eur thrown away.

The damned thing does not work, either with E51, E90 and N810. I could insert it into the E51 slot by extracting the pcb out of the plastic shell, thus exposing a longer stem for the microsd-like contacts.
No joy, though.

When I connect the Mobidapter+the usb stick to a phone, the leds soldered to the board (which by the way are exposed only when the plastic case is opened) light briefly, and also the usb stick led lights for a second or so.

No device recognized the external flash memory.

Furthermore, after a brief experiment, the battery of my N810 got almost flat discharged.

I bet that the microsd contacts don't allow enough raw Coulombs times second for the Mobidapter circuit and the usb stick to work, and maybe there's the risk that an excessive current drawn from the thingie might damage something.

I don't know if this is a problem of the unit I received, or the Mobidapter is a prank... However, I can't advice the purchase of such a gadget.

I'll try to get a refund :(

twoboxen 2009-10-07 01:07
Re: N900 will not allow USB OTG!
 
NOOOO!!! This thread is mucho bad news. Is there any chance that during the delay they fixed this hardware lapse?? I seriously doubt it, but man would that be nice.

Will anyone be able to discuss possible workarounds with Nokia folks at Maemo Summit this weekend?

Bratag 2009-10-07 01:30
Re: N900 will not allow USB OTG!
 
Quote:
Originally Posted by twoboxen (Post 340765)
NOOOO!!! This thread is mucho bad news. Is there any chance that during the delay they fixed this hardware lapse?? I seriously doubt it, but man would that be nice.

Will anyone be able to discuss possible workarounds with Nokia folks at Maemo Summit this weekend?
Its not a lapse - it has to do with USB standards and a desire to squeeze something into the device - USB charging.

Its a bummer I agree.

gunni 2009-10-08 16:16
Re: N900 will not allow USB OTG!
 
In a report that the EU demand 3.5 audio plug to be standard.
Hmm, this seems to be too late:

Quote:
Nach EU-Angaben bietet nur etwa ein Viertel aller verkauften Geräte Datenfunktionen an, doch selbst Einfach-Handys sollen in Zukunft über eine Micro-USB-Buchse geladen werden. Sofern die Geräte auch eine USB-Host-Funktion aufweisen, könnten die Hersteller nach Meinung der CTIA jedoch auf die Klinkenbuchse verzichten und stattdessen ein Headset mit USB-Anschluss mitliefern.
Google translated:
Quote:
According to EU figures only provides about one quarter of all units sold to date functions, but even easy phones will continue on a micro-USB connector to be loaded. If the devices have a USB Host function that would allow the producers, according to the CTIA, however, dispense with the jack and instead supply a headset with a USB port.
Source (german): http://www.heise.de/mobil/meldung/CT...ne-818548.html

*Edit*: Ok, could also be read as "when the device has micro for loading, and additional mini (or other allowed for USB-Host)"

SubCore 2009-10-08 16:49
Re: N900 will not allow USB OTG!
 
the text you quote only says that a 3,5mm audio jack is optional if the device provides USB host mode.
otherwise, a 3,5mm audio jack is required to ensure headset compatibility between devices.

imokruok 2009-10-08 17:49
Re: N900 will not allow USB OTG!
 
I realize that this is probably just piling on, but I was hoping to combine three devices with this product - a netbook, an MP3 player, and a backup GSM phone. I travel with all of those things, plus my Blackberry for worldwide push e-mail and calling. The netbook serves the purpose of browsing on a larger screen, watching videos, and backing up/posting pictures from my DSLR.

Doesn't look like that last feature will be possible on the N900, since I won't be able to copy files off of an SDHC card to the device. Also, I can't remember how many times I've been traveling with friends or colleagues, and we need to have a sneakernet with a USB drive to share a large file. Bummer, really, since this might be the only thing that keeps me from selling three items on eBay and pulling the trigger on this.

LOVED my N800 but can't see a reason to jump to this new unit yet unless someone comes up with a USB workaround.

mikec 2009-10-08 18:35
Re: N900 will not allow USB OTG!
 
Quote:
Originally Posted by imokruok (Post 341972)
I realize that this is probably just piling on, but I was hoping to combine three devices with this product - a netbook, an MP3 player, and a backup GSM phone. I travel with all of those things, plus my Blackberry for worldwide push e-mail and calling. The netbook serves the purpose of browsing on a larger screen, watching videos, and backing up/posting pictures from my DSLR.

Doesn't look like that last feature will be possible on the N900, since I won't be able to copy files off of an SDHC card to the device. Also, I can't remember how many times I've been traveling with friends or colleagues, and we need to have a sneakernet with a USB drive to share a large file. Bummer, really, since this might be the only thing that keeps me from selling three items on eBay and pulling the trigger on this.

LOVED my N800 but can't see a reason to jump to this new unit yet unless someone comes up with a USB workaround.
Imokruok
There is a smple answer to your problem.
put a micro SDHC card in an SD card adaptor and stick that in your camera!! now all you have to do is take the micro sd card out and stick it in your N900 and copy the files to the 32GB internal storage


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