Wi-Fi usb adapter not working

[Mr Ribbon]

For my pi zero I can't get the Wi-Fi usb adapter to work. When I boot up the pi the led from the wifi adapter just blinks once. I tried a fresh install and I made some changes in the boot directory. Nothing fixed the problem.

The wifi adapter should work with the pi.
The model = edimax n150 EW-7811UN
Installed = the last retropie version

I hope someone has a solution for my Wifi problem

[Vvizzini]

Is that the combo wifi blutooth adapter??

[Mr Ribbon]

Just googled the adapter. I can't find any Bluetooth information. Should be a normal one.

[mariovisic]

Hi

I have that same usb adapter, mine says "EW-7811Un" as the model number on the box. I'm using helders all in one board and I found I had to put the pi in to USB 1.1 mode to get it to work. I tried twisting the + and - USB cables together first and that didn't seem to help. You can find the instructions to set USB 1.1 mode in the helder support thread: http://www.sudomod.com/forum/viewtopic.php?t=1185

[Mr Ribbon]

Hi,

Thank you for the reply. I don't use the a.i.o. board, but I tried all the solutions from the support thread.
Nothing solved the problem.

[mariovisic]

First find out if the usb device is detected by the system, it should come up if you type in

Code: Select all

lsusb

. It should also be listed when typing in

Code: Select all

lsmod

. If it's not listed then could be a power or data connection problem. Double check your cabling and try isolate your data wires (try twist positive and negative data lines together.

If it does comes up in both then it's likely a software or config issue. Use

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ifconfig

and

Code: Select all

iwconfig

to see the status of what's happening. Be sure you have the correct config set in `/etc/network/interfaces`. You can find examples for your specific adapter by searching online.

[Lphillimore]

@Mr Ribbon

Are you able to see wireless networks but not connect or does nothing show?

The AIO thread details different options / fixes from editing config and OR cmdline

Which did you do? One, both?

It does not matter that you are not using an AIO though.
My latest build utilises a basic Button PCB and USB hub, Wifi working fine.

For me my setup is:

Config.txt - separate line = "max_usb_current = 1" (remove quotes).

Cmdline.txt - = Add onto last line “dwc_otg.speed=1” (remove quotes).

Previously this never worked for me as I added the Cmdline entry as a new line and not onto the end of the current line.

My config.txt is the same as the downloadable one from the AIO Support thread as mentioned with # removed for the Processor tweak.

Worst case I can send you my config files to test as I am able to use a variety of adapters (Wifi) with no issue.

Triple check that your data wires are twisted, too!

[Mr Ribbon]

@Mario @Lphillimore

Thank you for your help.
The Pi did not reconize the wifi adapter.I removed the usb hub and tried another brand. This fixed the connection problem.
I connected the pi to several networks .The only network that is not accepting the pi is my own network

Next week I will try to solve this problem.

Thanks again

[Lphillimore]

@Mario @Lphillimore

Thank you for your help.
The Pi did not reconize the wifi adapter.I removed the usb hub and tried another brand. This fixed the connection problem.
I connected the pi to several networks .The only network that is not accepting the pi is my own network

Next week I will try to solve this problem.

Thanks again

Glad you sorted it!

Odd it cant find your own. Maybe try adding the wifikeyfile.txt to your boot config as per:

https://github.com/retropie/retropie-setup/wiki/Wifi

Might help.

You could also try manually adding the network as per above guide, too.



Good luck.

[Mr Ribbon]

Today I solved the problem!
When I added the ssid and psk from my neighbours to the wpa_supplicant file the connection was working without any problems. With my own ssid and psk settings the connection just didn't work.
In my router I changed the ssid name and psk password. Made the same changes to the wpa_supplicant file, and.......It sounds strange but this solved the problem

Thanks again