Wow...that would have save me a ton of time if I'd seen it before! But yes...get the WiFi dongle away from the BBB board. Radio signals reduce in intensity with the square of the distance...so if the antenna is currently one inch from the BBB's radio interference - then moving it just 10" away will reduce the interference 100-fold, and getting it on the end of a three foot USB extension cord will reduce it 1000-fold...so it doesn't take much to make a huge difference.
-- Steve Gerald Coley wrote: > http://www.elinux.org/Beagleboard:BeagleBoneBlack#WIFI_Adapters > > Gerald > > > On Mon, May 5, 2014 at 1:18 PM, <[email protected]> wrote: > >> One problem I've seen with BeagleBone is that WiFi dongles seem to get >> electrical interference problems when plugged directly into the >> BeagleBone...using a USB extension cord seems to fix that. AFAIK, this >> problem causes unreliability in all chipsets...so if you have it >> basically >> working - but unreliable - then adding an extension cable might help. >> After all, we're dealing with radio signals here - and antenna >> interference is a big deal. Most uses of WiFi dongles are OUTSIDE the >> metal case of a PC or laptop - where the metal helps to shield the >> antenna >> from R/F junk being emitted by the computer chips...maybe just putting >> some >> distance between the BeagleBone and the antenna helps. >> >> -- Steve >> >> >> On Saturday, January 25, 2014 7:06:51 PM UTC-6, Harry May wrote: >>> >>> Thank you for all the information. >>> >>> This is my experience with reliable wifi. This took me 4 days and 4 >>> night(mares): >>> >>> I had all kinds of problems. Maybe the most important is that the >>> Micro-USB-Stick N150 (Netgear) does not work reliably. It was possible >>> to >>> setup a WiFi connection >>> but it broke down all the time. >>> The much more stable hardware is the stick described by Carl Johnson in >>> his first post (the bigger size netgear stick using the ath9k_htc >>> driver). >>> >>> I had no luck with Angstrom, the wifi stick was recognized and a dhcp >>> request startet, but succeeded only 1 of 10 times. >>> >>> So I ended up with Ubuntu saucy: >>> http://rcn-ee.net/deb/rootfs/saucy/ubuntu-13.10-console- >>> armhf-2014-01-24.tar.xz >>> and the instructions from this site: >>> http://elinux.org/BeagleBoardUbuntu (Debian or Ubuntu is the same >>> procedure) >>> >>> To setup the stick I modified /etc/network/interfaces: >>> auto wlan0 >>> iface wlan0 inet dhcp >>> wpa-ssid "MYSSID" >>> wpa-psk "MYPASSPHRASE" >>> >>> and the same for WLAN1 !!!! >>> I found out that changing from one stick to another may switch from >>> wlan0 >>> to wlan1, even if you power off. >>> >>> And tested it according: >>> http://embeddedprogrammer.blogspot.de/2013/01/beaglebone-using-usb-wifi- >>> dongle-to.html >>> as Carl already suggested. >>> >>> Everything worked fine, so I removed the LAN cable and rebooted the >>> bone. >>> >>> Now comes the important thing: WAIT at least 2 to 3 minutes. >>> It takes 2:30 minutes until the blue LED on the stick gets lit. >>> For any reason I don't know: at a later time it booted MUCH faster. >>> >>> I checked my DHCP router when the bone requested the IP. >>> Then it took some more time until I was able to SSH into the board via >>> wifi. >>> But after that time all went really nice. To test the wifi link I >>> copied >>> a 100MB file repeatedly until 100 GB were copied. >>> All went well. >>> My WLAN router can do 54Mbit, but iwconfig showed 15Mbit only. I have >>> no >>> idea why, but I am happy that all works well so 15M is good enough >>> for all my needs. >>> >>> This setup needs 650 MB on my SD card. >>> >>> What I learned in these 4 night and days: >>> * use ubuntu (not Angstrom) >>> * use saucy (not raring, I did not get it working with raring) >>> * never use these tiny N150 micro sticks. >>> >>> Harry >>> >>> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google >> Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send >> an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/9KCIs7yqsa8/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Steve -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
