signal strength/ctelephony

[belita]

hi,

I would like an application to get the current value of signal strength in the mobile. I have seen that this can be achieved with the class ctelephony from symbian, any application that can be done and move to mobile?

thanks

[symbianyucca]

Have you checked the Wiki for exmaples already: http://wiki.forum.nokia.com/index.ph...ith_CTelephony

[A.A.M.]

These articles in Wiki may be helpful for you:
- Measuring signal strength using CTelephony
- Monitoring signal strength with CTelephony

[belita]

hi,
thanks for the links. I used the code of "Measuring signal strength using CTelephony"
and now I don't know where to find the values of signal strength, where the package TSignalStrength is saved.
Can I see the results in the emulator? How?

[kiran10182]

hi,
thanks for the links. I used the code of "Measuring signal strength using CTelephony"
and now I don't know where to find the values of signal strength, where the package TSignalStrength is saved.
Can I see the results in the emulator? How?

Use the another article instead: Monitoring signal strength with CTelephony

It is implemented as Active Object. After issuing asynchronous service GetSignalStrength, you will be notified in the RunL method. There you will get results into iSignalStrength and iBar. This is what you are looking for.

PS: Emulator is not a phone, hence it does not have SIM card in it, thus it is not connected with real network. So you cannot retrieve such information on emulator. You should better try on real device.

All the best.

[belita]

hi! I used the code of the article "Monitoring signal strength with CTelephony" as you said me. Also I have put in AppUi.h class Cproyecto2AppUi: public CAknAppUi
{
.
.
void SignalStatus (TInt32 aStrength, TInt8 aBars);
.
.
}
Too I added:


CNwSignalCheck * iNwSignalCheck;

and later:

delete iNwSignalCheck;


I want to display on screen the values stored in signalstrength and for this I put a new case in the function "HandleCommandL" but I don't know the parameters to pass to the function.
how can I do?

thank you very much for the help!

[kiran10182]

In this example, observer pattern has been used. SignalStatus is a callback function and you will get notification in the registered class.

Let me explain it in more detail:

1 )You need to inherit mixin class in, let's say, AppUi class, as follows:

class Cproyecto2AppUi: public CAknAppUi, public MNwSignalObserver
{

// From MNwSignalObserver
public: 
void SignalStatus(TInt32 aStrength,TInt8 aBars);
...
...
};

2) You have to give implementation of SignalStatus in your AppUI.cpp file

// You will automatically get notification in the following function from RunL() from CNwSignalCheck as shown in the article.
void Cproyecto2AppUi::SignalStatus(TInt32 aStrength,TInt8 aBars)
{
...
}

3) You need to instantiate CNwSignalCheck object and register your class for an observer so that that class will receive notification.

void Cproyecto2AppUi::ConstructL()
{
      iNwSignalCheck = new (ELeave) CNwSignalCheck(*this); // Register AppUI class as an interested party for receiving notification
...
...
}

4) Call GetSignalInfo() from wherever you wish. Let's say from HandleCommandL

void Cproyecto2AppUi::HandleCommandL(TInt aCommand)
{
...
...
       case ECommand1:
            iNwSignalCheck->GetSignalInfo();
            break;
...
}

5) You will automatically get notification in your SignalStatus which we implemented in step 2)

6) Delete iNwSignalCheck in the destructor.

Cproyecto2AppUi::~Cproyecto2AppUi()
	{
	if (iNwSignalCheck)
		{
		delete iNwSignalCheck;
		iNwSignalCheck= NULL;
		}
....
....
	}

That's it. I hope that will help you. Let me know if you still have any confusion.

[belita]

thank you so much. This is very useful to me.
Until next week I can not see the results in a real mobile, so I don't know if actually shown on screen the signalstrength.

I have got two warnings, so my only question is: Do I have to make the function "signalstatus" or no implementation required in AppUi.cpp? if I have to make, where can i find? is it in any library?

[symbianyucca]

you need to implement the "signalstatus", since it is the callback which with you are given the values from the monitoring class.

[kiran10182]

I have got two warnings, so my only question is: Do I have to make the function "signalstatus" or no implementation required in AppUi.cpp? if I have to make, where can i find? is it in any library?

See, I have explained it step by step and as already said by Jukka, it is a callback function and you need to implement it anyhow. Because you inherit from MNwSignalObserver class which has that method as pure virtual and hence you have to implement it.

By the way I don't understand(like) why did you ask the same question again in some other thread while you are already getting reply in this thread!!!

[zohirey2]

hi
i have made it but have to finish

here the event of press a menu opton

TBool CLUILBHCISContainerView::HandleSignal_StrengthMenuItemSelectedL( TInt aCommand )
{


iNwSignalCheck->GetSignalInfo();
_LIT(x,"Signal Strenght is : ");

TBuf<30>y(x);
y.AppendNum(iStrength);


iEikonEnv->AlertWin(y);




// TODO: implement selected event handler
return ETrue;
}

and i have declare iStrength as public and the implementation of the SignalStatus

void CLUILBHCISContainerView::SignalStatus(TInt32 aStrength,TInt8 aBars)
{
iStrength = aStrength;
iBars = aBars;
}
but when i run emulator and choose the menu option the programm is terimnated and a message say App. Closed: appear

what i have to do?

[savaj]

i have made it but have to finish

What you made and what you want to finish???

First of all check what is the pacnic code.
http://wiki.forum.nokia.com/index.ph...ded_panic_code

Second you can try working example from wiki (i guess you are trying to get signal strength).
http://wiki.forum.nokia.com/index.ph...ith_CTelephony

[zohirey2]

i still can't solve this problem

TBool CLUILBHCISContainerView::HandleMenuItemSelectedL( TInt aCommand )
{

iNwSignalCheck->GetSignalInfo();

// TODO: implement selected event handler
return ETrue;
}

the application is closed and show me a message
App. closed:
LULBHCIS

i saw saw article
http://wiki.forum.nokia.com/index.ph...ded_panic_code
but
my emulator refused to show Tools -> Preferences

when i disable the line code


iNwSignalCheck->GetSignalInfo();

the program work so good when chose blank option menu!

[kiran10182]

Yes, I well received your e-mail just now.

the application is closed and show me a message
App. closed:
LULBHCIS

My utmost guess would be KERN-EXEC 3 panic.

but
my emulator refused to show Tools -> Preferences

Check this: http://wiki.forum.nokia.com/index.ph...ge_in_emulator

Solution: Have you instantiated iNwSignalCheck somewhere prior to calling its function? Please show the code where you have instantiated the class object iNwSignalCheck.

[zohirey2]

ok
all what i have done is:
1-declare
void SignalStatus(TInt32 aStrength, TInt8 aBars);

CNwSignalCheck* iNwSignalCheck;
in the LUILBHCISContainerView.h
and then
2-implement the function SignalStatus
in LUILBHCISContainerView.cpp
as follow
void CLUILBHCISContainerView::SignalStatus(TInt32 aStrength, TInt8 aBars)
{
TBuf<30>m;
_LIT(n,"Signal Strength: ");

m.Append(n);
m.AppendNum(aStrength);

iLUILBHCISContainer->Set1(m);




}
3- i call the function as follow
iNwSignalCheck->GetSignalInfo();

in the event of chossing some option menu

only this
what can i do??

KERN-EXEC 3
this is the panic