Automatically connect to open WiFi network

[acTennis]

Hi all,

I would like my rPi can automatically connect to any open wifi network at boot. I know that editing the wpa_supplicant.def file I can choose which wifi network use but the problem is that I don't know the SSID of the open network to connect. My goal is that the rPi can connect to any open wifi network founded (sure only one network at a time).

So a standard configuration like:

# Open WiFi Network.
network={
ssid="<name_here>"
key_mgmt=NONE
priority=3
}

can't be used.

Can anyone help me ?

Best Regards.

[DougieLawson]

Start with https://github.com/jsh2134/iw_parse/ you should be able to hack that to update /etc/wpa_supplicant/wpa_supplicant.conf with any open networks you find.

[acTennis]

Hi,

thanks for reply it's very usefull.

Do you know if is there an equivalent script in other languages? (python is not my best)

Best Regards.

[DougieLawson]

There's nothing else that I've seen.

Python isn't that awful once you've got over the lack of code block delimiters {} and the insane use of left hand white space as a syntax requirement.

[ghans]

Dooes the following entry in wpa_supplicant.conf not work ??

Code: Select all

# This one is for connecting to any unsecured network your machine comes into contect with, just comment out if you don't like this: 

network={
        key_mgmt=NONE
}

ghans

[acTennis]

Hi,

the SSID fields seems to be mandatory.

[mikerr]

I've used the below at the end of wpa_supplicant.conf for years:

Code: Select all

network={
        key_mgmt=NONE
        priority=-999
}

The low priority is to stop it connecting to an open network when there's one of my known SSIDs in range.

For reference my /etc/netowrk/interfaces is :

Code: Select all

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

[acTennis]

Hi,

I will try your configuration and I will report my results here.

Thanks for the moment.

[acTennis]

Hi all again,

the solution posted by mikerr seems to work but there is an open issue in my configuration.

The board boot with a WiFi adapter and DHCP configuration set in /etc/network/interfaces config file.
If a WiFi connection listed in /etc/wpa_supplicant/wpa_supplicant.conf is present at boot the rPi attach to it but if
the network is not present the rPi remain offline even if the WiFi network become available later.

In other words, only at boot che rPi join the WiFi networks, not during it's time life.

The /etc/network/interfaces file (only wifi part) is:

wlan0 auto
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp

I miss some configuration parameters ?

[DougieLawson]

You MUST have a loopback interface defined or very bad things happen.

Code: Select all

auto lo
iface lo inet loopback

[MrEngman]

Hi all again,

The /etc/network/interfaces file (only wifi part) is:

wlan0 auto
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface default inet dhcp

I miss some configuration parameters ?

First "wlan0 auto" is wrong and should be "auto wlan0". Second, you do not need both "auto wlan0" and "allow-hotplug wlan0".
Only one is needed - "allow-hotplug wlan0" is sufficient.


MrEngman

[acTennis]

Hi all,

I post my current interfaces file:

Code: Select all

## Loopback interface.
auto lo
iface lo inet loopback

## Wired ethernet interface (DHCP).
iface eth0 inet dhcp

## Wireless interface.
allow-hotplug wlan0
# wpa-roam can only be used with the manual.
iface wlan0 inet manual
    wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

## Development interface.
iface develop inet dhcp

## Customer interface.
iface wifi inet dhcp

## Default interface.
iface default inet dhcp

I have this processes running (only networks):

Code: Select all

/usr/sbin/ifplugd -i wlan0 -q -f -u0 -d10 -w -I
/sbin/wpa_supplicant -s -B -P /var/run/wpa_supplicant.wlan0.pid -i wlan0 -W -D nl80211,wext -c /etc/wpa_supplicant/wpa_supplicant.conf -C /var/run/wpa_supplicant
/sbin/wpa_cli -B -P /var/run/wpa_action.wlan0.pid -i wlan0 -p /var/run/wpa_supplicant -a /sbin/wpa_action
dhclient -v -pf /run/dhclient.wlan0.pid -lf /var/lib/dhcp/dhclient.wlan0.leases wlan0

[acTennis]

Hi all,

now the WiFi network attaches a network also after boot sequence (so it is solved).

For the WiFi open network , in my case set:

Code: Select all

network={
        key_mgmt=NONE
        priority=-999
}

doesn't work.

[DineshSam]

Hi, I’m new to Raspberry pi & linux. I don’t know much about coding but i can understand by reading.
I also want my pi to auto connect to open wifi network. Can you help me to do that? Please post here a step by step coding. I connect to my pi via SSH from my computer.
PLEASE.