On 24-05-17 14:58, Mike Looijmans wrote:
For boards that offer WiFi, I'd want them to connect more or less automatically.
I was wondering if there were better ways than handcrafting shell scripts to
do this on a headless embedded board?
If I put wpa-conf into /etc/network/interfaces it works, but blocks booting
for a long time if the wifi isn't there.
I've been using ifplugd combined with wired ethernet, and this also works fine
with wireless. Once wpa-supplicant connects to an access point, the link
reports up and DCHP can start.
Starting wpa_supplicant from the commandline runs fine:
/usr/sbin/wpa_supplicant -B -P /var/run/wpa_supplicant.wlan0.pid -i wlan0 -c
/etc/wpa_topic.conf -D
However, putting this line into a startup script (/etc/rc5.d/...) hangs. It
doesn't matter whether I start early or late, the wpa_supplicant just hangs
and waits and doesn't fork into daemon mode like it should. Tried setting PATH
and redirecting input, invoking through start-stop-daemon, but that didn't help.
Found this issue, apparently the interface is down and wpa_supplicant waits
for it.
Adding "ifconfig wlan0 up" prior to wpa_supplicant prevents that hangup.
Appending an ampersand to the command makes the boot continue, but
wpa_supplicant doesn't work, it won't connect to the access point.
This problem remains however. Starting interactively works fine, starting from
any form of shell script at boot makes it start up fine but it doesn't
connect. Starting up "wpa_cli" interactively to diagnose what's going on, but
not actually typing any command, usually makes it connect all of a sudden.
Kind regards,
Mike Looijmans
System Expert
TOPIC Products
Materiaalweg 4, NL-5681 RJ Best
Postbus 440, NL-5680 AK Best
Telefoon: +31 (0) 499 33 69 79
E-mail: mike.looijm...@topicproducts.com
Website: www.topicproducts.com
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