On Fri, Apr 03, 2015 at 08:38:06PM +0200, Alexander Aring wrote: > On Fri, Apr 03, 2015 at 08:27:44PM +0200, Guido Günther wrote: > > On Fri, Apr 03, 2015 at 04:45:02PM +0200, Alexander Aring wrote: > > > On Fri, Apr 03, 2015 at 04:36:47PM +0200, Guido Günther wrote: > > > > Hi, > > > > I'm trying to get 6lowpan to work using bluetooth-next on the above > > > > hardware[1]. I'm currently using bluetooth-next as of > > > > baf880a96859cca79208122e555e7efeabd16e4d . When I do a: > > > > > > > > iwpan dev wpan0 set pan_id 0xbeef > > > > > > > > I get: > > > > > > > > command failed: Device or resource busy (-16) > > > > > > > > > > you can set the pan_id when you interface is down only. > > > > There was an ifplugd on the pi which continued to up the device - > > damnit. Sorry for the noise. I can now ping the two devices but am > > seeing massive packet loss: > > This "ifplugd" thing is a common issue, most people which using raspbian > reported similar issues. I've documented this at [1] so hopefully Google helps to avoid this a bit. > > > > > # ping6 -s 20 -I lowpan0 fe80::f836:9287:905c:a684 > > PING fe80::f836:9287:905c:a684(fe80::f836:9287:905c:a684) from fe80::cb23:b779:742d:4fd2 lowpan0: 20 data bytes > > 28 bytes from fe80::f836:9287:905c:a684: icmp_seq=3 ttl=64 time=27.7 ms > > 28 bytes from fe80::f836:9287:905c:a684: icmp_seq=4 ttl=64 time=12.7 ms > > 28 bytes from fe80::f836:9287:905c:a684: icmp_seq=5 ttl=64 time=12.7 ms > > ^C > > --- fe80::f836:9287:905c:a684 ping statistics --- > > 16 packets transmitted, 3 received, 81% packet loss, time 15017ms > > > > Will need to dig into this again. > > > > mhh, is this a linux to linux connection? Maybe try to activate ARET > mode, you can do that with: Linux to Linux, yes. Thought that this is simpler before trying to talk to Contiki. > > iwpan dev wpan0 set max_frame_retries 3 > > or something differs with 3, -1 will turn off the ARET mode. Value 0 > will do csma handling only. All above 0 will do retransmission tries. > You should do that on both nodes and all nodes in your network need to > support AACK handling. (Automatck ACK). > > Or maybe switch channel, I am running out of ideas now. :-) I turned out that the 1.5 meters with some metal in the walls was far too much of a faraday cage for that module (altough it isn't a problem for 802.11). Moving things closer together made the packet loss mostly go away. Cheers, -- Guido [1] https://honk.sigxcpu.org/piki/hw/rpi6lowpan/ -- To unsubscribe from this list: send the line "unsubscribe linux-wpan" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
