[TriLUG] Wifi Adapter for Pi

[Pete Soper]

Remember too that if you have a rev 1.0 RPi (i.e. one without the two 
mounting holes, 1/4gb RAM for a model B) it will *not* pass enough 
current through to the USB ports to power nontrivial peripherals (i.e. 
much beyond a mouse and keyboard). This is because there is a current 
limiting (polysilicon or similar) fuse that limits the current. That's 
what all the "You *must* use a powered hub" warnings are about.

With a rev 2.0 board (2 mounting holes, 1/2gb RAM for model B, started 
shipping late last year) then the power supply current spec becomes 
relevant. And 1.2 amps may not be enough for some setups, such as little 
USB disc drives, but we would hope it would be plenty for 
keyboard/mouse/wifi.

The symptoms of inadequate current can unfortunately be pretty 
confusing, leading a person to think the peripheral is incompatible with 
the RPi in some cases.

-Pete


On 01/25/2013 08:53 PM, Thomas V Thomas wrote:
> These worked out of the box on the RPi,
>
> Logitech Wireless Touch Keyboard K400 with Built-In Multi-Touch Touchpad
> (920-003070) <http://www.amazon.com/dp/B005DKZTMG/ref=pe_175190_21431760_M3T1_ST1_dp_1>
> HK Mini USB WiFi 150Mbps Wireless Adapter 150M LAN Card 802.11n/g/b with
> Antenna <http://www.amazon.com/dp/B008BZ40HA/ref=pe_175190_21431760_3p_M3T1_SC_dp_1>
>
> Wifi setup instructions -
> http://www.raspberrypi-tutorials.co.uk/raspberry-pi-easy-wireless-set-instructions/
>
>
> You will need atleast 1200mA charger as you will be using both usb ports. I
> got the keyboard & power charger (dual port USB charger) at the Walmart in
> Morrisville (Shiloh Grove).
>
> Will also need a HDMI cable to hook up to TV and microUSB cable to power
> the RPi.
>
> Thomas
>
> Thomas V Thomas
> thomasvt at gmail.com
>
>
> On Fri, Jan 25, 2013 at 10:39 AM, Igor Partola <igor at igorpartola.com> wrote:
>
>> I can recommend one not to buy...
>>
>> I got BUFFALO AirStation N150 Wireless USB Adapter - WLI-UC-GNM from Amazon
>> a little while ago. Works great, but two problems:
>>
>> 1. It doesn't have enough range and even sitting next to the router, packet
>> loss is noticeable.
>>
>> 2. It overheats like crazy. I had it plugged into the USB hub and the Pi
>> started freezing up. When I went to investigate it burned my fingers. The
>> whole USB hub was very warm but the side with this adapter was unbearably
>> hot. Mind you, I was sending no traffic through it: it was just a backup to
>> the wired connection.
>>
>> The next adapter I will buy will likely have an external antenna. It's a
>> shame this one didn't work: I generally like Buffalo products.
>>
>> Igor
>>
>> On Fri, Jan 25, 2013 at 10:33 AM, Scott Connolly <scott802 at gmail.com>
>> wrote:
>>
>>> Hi All,
>>>
>>> Can anyone recommend a locally sourced (Intrex, etc) USB wifi module that
>>> works with Raspian/Raspbmc? I'm looking/hoping for plug and play or
>> minimum
>>> setup required.
>>>
>>> Thanks,
>>> Scott C.
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