On January 14, 2018 7:20:29 AM EST, Fil <fil.berg...@riseup.net> wrote: > >On 13/01/2018 22:36, John Sullivan wrote: >> Hi all, > >Hi John, > >> Does anyone know of an OTG hub (ideally with 2-3 USB 2.0 or 3.0 >> connections) that can charge the phone/tablet while the other devices >> are connected? > >I just got myself one of those, featuring 3 usb connections and an >additional charging socket. >It also features a switch to change between charge and OTG mode, but >that seems to only apply to devices that actually separate the two >things. >I obtained mixed results using it. Read on for more insight. > >> I'm looking to use primarily with a Note 8.0 tablet, secondarily with >a >> Note 2 phone if it so happens to work. Device wise, I want mainly to >> connect a USB keyboard and a USB wifi dongle. > >I personally tried both of those devices with the OTB hub and this is >what I learned: >The fact is that OTG and charging need two different wiring >configurations (i guess micro resistors with different values are >involved), and while the cable itself can provide either of them at a >single time, the possibility to do OTG and charging at the same time is >device specific. >I think it has to do with the specific wiring *inside* the device. >My personal experience is that the Note 8.0 tablet happily charges >while >using the WiFi dongle (had to do a couple of attempts with the >charge-OTG switch but it does work). >Unfortunately the Note 2 doesn't allow for such a configuration, no >matter what combination I tried. And I think there's absolutely NO >chance of having it charge while in OTG mode without changing resistors >on the board itself. > >As a side note, the Galaxy S3 (GT-I9300) can also charge while in OTG >mode, just like the Note 8.0. > >> I've read some commentary that seems to indicate that what I want >> doesn't exist for safety standard reasons (power only supposed to >flow >> one way), but I can't tell for sure. > >I tend to believe those are false claims.. >Instead, as I said, it all depends on the specific device design. >And there's very little one can do if the device's board doesn't >support >both modes at the same time.. > >Hope I've been helpful. > >Happy hacking, > >Fil
Hi Fil, Very helpful thanks. Do you have a link to the one you are using with the Note 8.0? Mine does not charge while using the WiFi adapter. Well, I am assuming the charging icon would display - does it display for you? And is your Note 8.0 the GSM model or just WiFi? _______________________________________________ Replicant mailing list Replicant@osuosl.org https://lists.osuosl.org/mailman/listinfo/replicant
