Raspberry Pi Forums

I recently purchased a couple of the A+ models and installed Raspbian on them (one's for a gift). I already had a TP-Link TL-WN725N wireless card (which I use regularly in a laptop) and found it on the list at http://www.elinux.org/RPi_USB_Wi-Fi_Adapters . I was not sure whether it was the version 1 or version 2 mentioned there, but it didn't "just work" as suggested for the V1 model so I suspected V2. After some problems with the unpowered hub I was using (shutting down on inserting the card) I decided to get a powered hub, even though it was suggested at the link above that this wasn't necessary for these cards. I also got 2 more of the same wifi cards, mostly so that I would know from the packaging which version they were (V2.1). For reference, the new ones have gold connectors and the old one had a silver connector (indicating V1 maybe?).

Now I can power up the Pi with the cards attached, but when I run the "lsusb" command as suggested in some guides, there is no mention of anything that looks like a network card (it's just various hub devices and my wireless keyboard). Also, on an unrelated note, the Pi will power on when the powered hub is connected to its one USB device port (and there is nothing connected to the micro-USB power port).

Some questions:
- Why would the wireless cards not be showing up in lsusb? I know they work as I've tested them in my (Windows) laptop, and I've tried switching their positions in the hub to ones where I know the keyboard has been recognized.
- What's the most straightforward way of getting drivers installed, keeping in mind that I have no internet connection on the A+ until wifi is working? Some guides use commands that seem to be downloading files directly from the internet (I think), but can anyone recommend a Windows solution for transferring files to the SD card?
- Is the fact that the Pi can power up with nothing attached to its power port unusual (weird hub design?) or expected? Could powering it in this way be bad for the computer?

66h wrote:I recently purchased a couple of the A+ models and installed Raspbian on them (one's for a gift). I already had a TP-Link TL-WN725N wireless card (which I use regularly in a laptop) and found it on the list at http://www.elinux.org/RPi_USB_Wi-Fi_Adapters . I was not sure whether it was the version 1 or version 2 mentioned there, but it didn't "just work" as suggested for the V1 model so I suspected V2. After some problems with the unpowered hub I was using (shutting down on inserting the card) I decided to get a powered hub, even though it was suggested at the link above that this wasn't necessary for these cards. I also got 2 more of the same wifi cards, mostly so that I would know from the packaging which version they were (V2.1). For reference, the new ones have gold connectors and the old one had a silver connector (indicating V1 maybe?).

Now I can power up the Pi with the cards attached, but when I run the "lsusb" command as suggested in some guides, there is no mention of anything that looks like a network card (it's just various hub devices and my wireless keyboard). Also, on an unrelated note, the Pi will power on when the powered hub is connected to its one USB device port (and there is nothing connected to the micro-USB power port).

Some questions:
- Why would the wireless cards not be showing up in lsusb? I know they work as I've tested them in my (Windows) laptop, and I've tried switching their positions in the hub to ones where I know the keyboard has been recognized.
- What's the most straightforward way of getting drivers installed, keeping in mind that I have no internet connection on the A+ until wifi is working? Some guides use commands that seem to be downloading files directly from the internet (I think), but can anyone recommend a Windows solution for transferring files to the SD card?
- Is the fact that the Pi can power up with nothing attached to its power port unusual (weird hub design?) or expected? Could powering it in this way be bad for the computer?

There are several USB WiFi Adaptors which work without further configuration like:

http://swag.raspberrypi.org/collections ... fi-adaptor

Getting cards known to "just work" definitely would have made things simpler in many ways. I have the cards already though so I would like to figure out how to get them working. What situations can cause a USB device known to work in other computers not to show up in the lsusb listing on the Pi?