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03.31.2005 at 05:15AM PST, ID: 21371287

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6.0

How to turn on/off Wireless LAN

Zone: Programming for 802.11x Wireless Standard

Tags: turn, wireless, radio, off

Hi,

I am trying to turn on/off the wireless LAN on a XDA IIs, through a Win32 application for Windows CE 4.20.
I can discover the NDIS driver and scan the existing networks, but I cannot turn the radio ON and OFF.

Does anyone know how can I do this?

Cheers,
Eduardo

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Question Stats

Zone: Programming

Question Asked By: opanza

Solution Provided By: RomMod

Participating Experts: 4

Solution Grade: B

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04.05.2005 at 05:22AM PDT, ID: 13706181

jhance:

According to the specification, sending an OID_802_11_DISASSOCIATE will cause the radio to turn OFF. It should remain that way until another command like OID_802_11_SSID or OID_802_11_BSSID is sent.

04.05.2005 at 06:39AM PDT, ID: 13706955

opanza:

It should cause the radio to turn OFF, but it doesn't.
I have set OID_802_11_DISASSOCIATE with DeviceIoControl and it returns S_OK, but if I come back to Start > Settings > Connections > WLAN, the Wireless LAN is still ON with a Status of Connected to network.

I've tried to use the WZCSAPI (Wireless Zero Configuration System API), but I don't have Microsoft Windows CE Platform Builder 4.2.

04.05.2005 at 03:36PM PDT, ID: 13712367

jhance:

1) WZC, if running, is likely to turn the radio back on as a part of its normal operations. If you really want the radio off, stop WZC.

2) If DISASSOCIATE does not turn the radio off, then the driver is in error. Contact the manufacturer of the wireless device for an update.

If all else fails, you should be able to disable the hardware device itself which should, as a byproduct of disabling the card, disable the radio also. See the SDK for SetupDi... functions. I think there is a DDK sample demonstrating this functionality also.

04.06.2005 at 01:45AM PDT, ID: 13714809

opanza:

How can I now that WZC is running? How can I stop WZC? Is there any programmatically way to do this?

04.06.2005 at 08:54AM PDT, ID: 13718209

opanza:

To stop WZC I have set Flags to 0x000008 and Keep to 0x000000 (both REG_DWORD) in HKLM\Drivers\BuiltIn\ZeroConfig.

Once it seems I've stopped WZC, I come back to the Wireless LAN Manager and there's no SSID, no Channel, no BSSID and no MAC, but Status is still "Connecting to network.", TX Rate is "Auto" and Mode is "Infrastructure".

Then, I've tried to DISASSOCIATE but the "Wireless LAN ON" check box is still checked.
I'm sure I've got the latest version of the driver.

04.06.2005 at 03:16PM PDT, ID: 13721937

EngelTier:

Hi there, to turn on/off the radio:
load the iPAQUtil.dll
use iPAQSetWLANRadio(true);//true on, false off
and thats it.

Engel Tier

04.07.2005 at 01:29AM PDT, ID: 13724790

opanza:

Hi EngelTier,

How can I get iPAQUtil DLL? Is there any available URL to download this file?

Cheers

04.07.2005 at 01:53AM PDT, ID: 13724919

opanza:

Sorry, my device is an XDA IIs (HTC). I can't use iPAQUtil on it.

04.11.2005 at 05:47AM PDT, ID: 13752196

opanza:

I have solved this question like this:

CEDEVICE_POWER_STATE state = D4;
hr = SetDevicePower( TEXT( "{98C5250D-C29A-4985-AE5F-AFE5367E5006}\\TIACXWLN1" ), POWER_NAME, state );

This turns off the Wireless LAN radio. To turn it on, just change state value to D0.

04.11.2005 at 11:13AM PDT, ID: 13755234

RomMod:

A request has been made to close this question. If there are no objections within 4 days, the request will be granted.

EXPERTS: Please post your comments on the disposition of this question here.
In the absence of additional input, this question will be closed as follows:

PAQ / Refund

Thank you,
RomMod
Community Support Moderator

04.14.2005 at 10:22PM PDT, ID: 13788236

RomMod:

The question has been PAQ'd and the 500 points have been refunded.
RomMod
Community Support Moderator

Accepted Solution

09.14.2005 at 03:00PM PDT, ID: 14885353

i-mate05:

opanza, I am trying to do the same thing in C#, but the wireless radio won't turn on/off. Perhaps I got the wrong associated class? Here is the link to my question in the C# section: http://www.experts-exchange.com/Programming/Programming_Languages/C_Sharp/Q_21560483.html

Can you please take a look? Thanks.

Minh

20080236-EE-VQP-29