Enable Wifi by script?

[kanataa]

Dear community

I've a Kobo Glo HD with XCsoar (https://xcsoar.org/) installed, everything works fine and it's overall a great device.

Unfortunately, since a few weeks ago, the upper part of my display (~1 inch) isn't working anymore. (Doesn't react on touch inputs).
Because of this, I'm no longer able to switch on and off the Wi-Fi.

Is there a possibility to activate / deactivate the Wi-Fi by script?

[NiLuJe]

On a stock Kobo, sure (although it's not necessarily entirely trivial).

In XCSoar though, you'd have to ask the XCSoar guys.

[Mavireck]

I am just having the same issue, so I will use this thread instead of creating a new one ;-)

I would like to toggle Wifi on and off by executing a script for my app (a homemade dashboard launched through KFmon) for battery-saving purposes

I can easily disable Wifi with a script.
It looks like I can enable it. But it does not seem to connect to the available know wifi network. (Actually, what my log says is that the script is correctly executed, but the IP Adress remains 127.0.0.1)

I am using these scripts borrowed from koreader's sources:
wifidown.sh

Spoiler:

#! /bin/sh

lsmod | grep -q sdio_wifi_pwr || exit 1

killall udhcpc default.script wpa_supplicant 2> /dev/null

[ "$WIFI_MODULE" != 8189fs ] && [ "$WIFI_MODULE" != 8192es ] && wlarm_le -i "$INTERFACE" down
ifconfig "$INTERFACE" down

sleep 0.2
rmmod -r "$WIFI_MODULE"
rmmod -r sdio_wifi_pwr

wifiup.sh

Spoiler:

#! /bin/sh
# Load wifi modules and enable wifi.

lsmod | grep -q sdio_wifi_pwr || insmod "/drivers/${PLATFORM}/wifi/sdio_wifi_pwr.ko"
# Moar sleep!
usleep 250000
# WIFI_MODULE_PATH = /drivers/$PLATFORM/wifi/$WIFI_MODULE.ko
lsmod | grep -q "${WIFI_MODULE}" || insmod "${WIFI_MODULE_PATH}"
# Race-y as hell, don't try to optimize this!
sleep 1

ifconfig "${INTERFACE}" up
[ "$WIFI_MODULE" != "8189fs" ] && [ "${WIFI_MODULE}" != "8192es" ] && wlarm_le -i "${INTERFACE}" up

pidof wpa_supplicant >/dev/null \
    || env -u LD_LIBRARY_PATH \
        wpa_supplicant -D wext -s -i "${INTERFACE}" -O /var/run/wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -B

I would like the wifiup.sh script to automatically connect to a wifi network, so that after its execution I can make my API calls with my app ;-)

Can anyone help me out ?

(Oh and I may have the same question with a script that would turn up and down brightness, if anyone has that, I can't find much documentation - I am new to progamming things which almost directly communicates with the hardware)

[NiLuJe]

You're missing the bits from acquire-ip.sh (i.e., dhcp).

FL control is via ioctl (except on Mk. 7 when there's also a sysfs entry), so, that'd need a C helper if you want to cover all current devices.

[Mavireck]

Originally Posted by NiLuJe

FL control is via ioctl (except on Mk. 7 when there's also a sysfs entry), so, that'd need a C helper if you want to cover all current devices.

Yes thank you for your help, it is now working well on my H20 (mark5 - I am not going to try to make it work on a mark7 for now)

As for wifi. Disabling seems to work, but connecting to the network doesn't:
I copied the whole sources from koreader in a folder called 'files' in my app.
It is coded in Python (of course). After a click on a button, it launches a function which among other things, executes these lines of code:

os.system("sh ./files/enable-wifi.sh")
time.sleep(5)
os.system("sh ./files/obtain-ip.sh")
print("Wifi enabled")

But it still does not connect to the wifi network (IP remains local), while it does connect with Nickel.
Am I missing something ?

I also have another unexpected issue : the "Wifi enabled" message is being printed multiple times... Can it be due to the problem I am having (or cause it?). I really don't know why it would be executed multiple times in my code.

Thank you for your help !

[sherman]

Originally Posted by Mavireck

Yes thank you for your help, it is now working well on my H20 (mark5 - I am not going to try to make it work on a mark7 for now)

As for wifi. Disabling seems to work, but connecting to the network doesn't:
I copied the whole sources from koreader in a folder called 'files' in my app.
It is coded in Python (of course). After a click on a button, it launches a function which among other things, executes these lines of code:

os.system("sh ./files/enable-wifi.sh")
time.sleep(5)
os.system("sh ./files/obtain-ip.sh")
print("Wifi enabled")

But it still does not connect to the wifi network (IP remains local), while it does connect with Nickel.
Am I missing something ?

I also have another unexpected issue : the "Wifi enabled" message is being printed multiple times... Can it be due to the problem I am having (or cause it?). I really don't know why it would be executed multiple times in my code.

Thank you for your help !

enable-wifi.sh doesn't include the required Nickel environment variables. You want to look at lines 93-94 from koreader.sh. They are the lines that read:

eval "$(xargs -n 1 -0 <"/proc/$(pidof nickel)/environ" | grep -e DBUS_SESSION_BUS_ADDRESS -e NICKEL_HOME -e WIFI_MODULE -e LANG -e WIFI_MODULE_PATH -e INTERFACE 2>/dev/null)"
    export DBUS_SESSION_BUS_ADDRESS NICKEL_HOME WIFI_MODULE LANG WIFI_MODULE_PATH INTERFACE

You may like to also look at the shell scripts from my Kobo UNCaGED, project, more specifically scripts/nickel-usbms.sh, lines 69-71.

Note, the Wifi stuff in that file may look a little familiar. I took a lot of "inspiration" from koreader for the Wifi stuff.

[Mavireck]

Originally Posted by sherman

Spoiler:

enable-wifi.sh doesn't include the required Nickel environment variables. You want to look at lines 93-94 from koreader.sh. They are the lines that read:

eval "$(xargs -n 1 -0 <"/proc/$(pidof nickel)/environ" | grep -e DBUS_SESSION_BUS_ADDRESS -e NICKEL_HOME -e WIFI_MODULE -e LANG -e WIFI_MODULE_PATH -e INTERFACE 2>/dev/null)"
    export DBUS_SESSION_BUS_ADDRESS NICKEL_HOME WIFI_MODULE LANG WIFI_MODULE_PATH INTERFACE

You may like to also look at the shell scripts from my Kobo UNCaGED, project, more specifically scripts/nickel-usbms.sh, lines 69-71.

Note, the Wifi stuff in that file may look a little familiar. I took a lot of "inspiration" from koreader for the Wifi stuff.

Thank you so much ! My problem is solved !
I did absolutely not know of the details of exported variables within bash scripts. My initialization script did not export all the variables required (it did not export WIFI_MODULE_PATH for instance).
I still had some issues, until I found that the $PLATFORM variable was not defined. For now I hardcoded the path to the wifi driver:

lsmod | grep -q sdio_wifi_pwr || insmod "/drivers/mx50-ntx/wifi/sdio_wifi_pwr.ko"

instead of :

lsmod | grep -q sdio_wifi_pwr || insmod "/drivers/${PLATFORM}/wifi/sdio_wifi_pwr.ko"

That is enough to make it work on my device ! I will further investigate about that platform variable issue, but that is already a great step forward!