Re: [Dorset] CUPS browsing fails on Wifi access point
Hi Ralph On 31/07/2019 11:30, Ralph Corderoy wrote: Hi Tim, Basically, it's a toggle setting and toggling the IPv6 resets the router and I get IPv4 entries in the avahi-browse response (IPv6 enabled or disabled). Switching to one of the other AP's, and back again, and I just get IPv6 entries appearing, whether IPv6 is enabled or disabled on AP0 (which is definitely strange). Could it be that IPv6 responses are being remembered when talking to a non-AP0 but then can't be used with AP0? If the laptop temporarily disabled IPv6 on the Wi-Fi interface then it would be using IPv4 to all APs? Something like this should do. It's temporary, resetting to default on reboot. i=wls34# Change to suit. ip a s dev $i # Show the ‘before’. sysctl net.ipv6.conf.$i.disable_ipv6 sudo -i sysctl net.ipv6.conf.$i.disable_ipv6=1 ip a s dev $i Just tried this, important to rerun after AP reconnect, and it sheds some light on the issue. Connected to AP0 with IPv6 disabled on the laptop and on AP0, I get no response to avahi-browse -at That's to be expected following the earlier test result. However, it's good to confirm it. So I guess that tells us that Avahi browsing is not getting through that router on IPv4, and that CUPS is having a problem with Avahi on IPv6? Couple of things I'll try here. I see the router has a recent firmware update which I'll flash. And I have a similar Draytek router at work. I'll see if I get the same issues there. Cheers Tim -- Next meeting: BEC, Bournemouth, Tuesday, 2019-08-06 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Speeding up HTML response
Hi Peter, > I have now got my RC car running with the Raspberry Pi, but it is slow > to respond. I am wondering if I use a better tablet, or is there a > faster browser to use than firefox, or other means of making it > respond faster. Ditch the tablet and Firefox to rule them out. Prod the Flask web server with curl(1) instead. So if it serves a ‘forward’ entry point, Logo like, responding to GETs on it then try time curl -sSgv --trace-time http://$ip:$port/forward That will show the HTTP query being sent, and the HTTP reply, with each line time-stamped, and the overall time at the end, though that includes curl's execution time. That will show if the Pi is replying quickly. You could run that command on the Pi itself using the IP address of the loopback interface, 127.0.0.1, to cut out the Wi-Fi interface too. If that's still slow then perhaps your Python needs improving. :-) -- Cheers, Ralph. -- Next meeting: BEC, Bournemouth, Tuesday, 2019-08-06 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] CUPS browsing fails on Wifi access point
Hi Tim, > Basically, it's a toggle setting and toggling the IPv6 resets the > router and I get IPv4 entries in the avahi-browse response (IPv6 > enabled or disabled). Switching to one of the other AP's, and back > again, and I just get IPv6 entries appearing, whether IPv6 is enabled > or disabled on AP0 (which is definitely strange). Could it be that IPv6 responses are being remembered when talking to a non-AP0 but then can't be used with AP0? If the laptop temporarily disabled IPv6 on the Wi-Fi interface then it would be using IPv4 to all APs? Something like this should do. It's temporary, resetting to default on reboot. i=wls34# Change to suit. ip a s dev $i # Show the ‘before’. sysctl net.ipv6.conf.$i.disable_ipv6 sudo -i sysctl net.ipv6.conf.$i.disable_ipv6=1 ip a s dev $i -- Cheers, Ralph. -- Next meeting: BEC, Bournemouth, Tuesday, 2019-08-06 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
[Dorset] Speeding up HTML response
I have now got my RC car running with the Raspberry Pi, but it is slow to respond. I am wondering if I use a better tablet, or is there a faster browser to use than firefox, or other means of making it respond faster. This is a python app with HTML front end using Flask, and the R-Pi also configured as an Access Point. Here it is: https://www.youtube.com/watch?v=jsj-cnHkr_k=119s Peter -- Next meeting: BEC, Bournemouth, Tuesday, 2019-08-06 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
