WIFI not working

is your wifi network visible to outside devices, I know on mine I have to press a button on the router to get it visible to devices not already connected.

The default preset for the Atlas3D is right laser only, at 1.9 megapixels.  This gives moderately good results with a quick scanning speed...good for figuring out your lighting conditions, object suitability, etc.  You can make your own presets and bump up the resolution, use either or both lasers, and adjust things like noise removal and laser detection.

What model of Pi are you using?

I was just trying to think of the possibilities: Pi3 has wifi built in; Pi2 is a dongle. I'm sure yours is a Pi2 then.

I've never had trouble with my Atlas3D and wifi, but I have had occasional hiccups on other Pi's that I have.  What encryption method are you using for you wifi?

Here's a suggestion: shut down the pi through the UI, then power it off with the switch.  Move the wifi dongle to a different USB port.  Wait 30 seconds, then power up the Atlas3D and see if there's any difference in behavior.  Lather, rinse, repeat until you find a more hospitable USB port, or you've tried all four.  Let us know what happens.  For whatever reason, I've had wifi dongles that liked particular USB ports better than others.  Go figure.

I'm using WPA2-PSK[AES]; are you using that or the TKIP flavor?  Just trying to eliminate possibilities here...try turning encryption off briefly, to see if that has an effect.

The USB thing is odd.  You're using the power supply that came with the kit?

I have heard of some wifi dongles not liking particular routers.  You may try a different dongle, or take it to a friend's house and see if it works on theirs.

It could be possible the Dongle is set for a different channel. In wifi you have different channels you can use in case one channel is getting interference from something or another wifi setup. You need to make sure the channel on the dongle is the same as the one in your routers settings.

Does anyone know where I can get drivers for the WIFI dongle?  The internet is full of them but none I tried work.  I am trying to use my personal computer to make a connection through the dongle to see what I can find out to make it work on the iP.

This is the WIFI dongle that came with the Atlas 3D scanner.  It works in the Pi on my brother's network but not on mine.  I just found the drivers for it for Windows 7 64bit and the dongle works with Windows.  For some reason the dongle can see the SSID name but will not connect using the Pi.

The dongle is a Realtek RTL8188EU and the driver for Windows can be found at:

http://sciencespaces.com/search/Realtek … k+Adapter/

The router is an ASUS RT-AC3200 which I purchased about a year ago and is configured to support 802.11a/b/g/n/ac. I think your right in that it has something to do with my router setup but I just can't fine what it is.  All other WIFI devices I have all work great and I have never had any problems.

Contents of the /etc/wpa_supplicant/wpa_supplicant.conf file less the psk password:

#Country=GB
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

network={
ssid="MicroSmart"
psk="**********"
proto=RSN
key_mgmt=WPA-PSK
pairwise=TKIP
group=TKIP WEP104 WEP40
auth_alg=OPEN
}

Uriah got me to change it to:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

network={
ssid="MicroSmart"
psk="**********"
}

Now it works correctly, I did however have problems saving the wpa_supplicant.conf file using "sudo nano".  When I would save and exit nano it would change the file back to it's original state, so I saved the file and then rebooted which worked well yielding a working WIFI connection.

Hope this helps and thanks to all who helped.

Dan