[FIX] For wifi connection dropping too easily/often

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gtg465x

Inactive Recognized Developer
Jun 16, 2008
4,748
3,277
p.s. can i use your fix in the next update for my ROM (credits included ;-) !! ) and is it possible to increase the values a little more (just for personal interest)

Sure. To test different values, just change the value of rssi_offset in calibration. Of course the wifi signal indicator will not display right until changes are made in framework if you do this.
 
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brokenworm

Senior Member
Jan 25, 2009
350
179
45
marsdroid.me
U lamers is too much ,should've kill the noob ? Pr just let him lie.

yes i used the xtc clip to get s-off, but didn´t buy one. i found someone who has this clip in a german android forum. meet him, give him some bugs (15€) and a coffee and while drinking that coffee he unlocked my wildfire and my desire s.

so you needn´t to buy it, cause you only will use it once. the s-off with the xtc clip is irreversible. nothing what you can flash can change that at the moment.

there is a second possibility with the clip as i read. there is a new version for sale which works "prepaid" and costs something like 25€/20£ which is a quite cheep way to get s-off i think.

phone repair shops in berlin for example have that clip too. will take some time to find one, but it´s really simple when you live in a bigger city.




grrrrr ;-) i know that i´m not a hardcore dev :-( sadfully for myself too.
i would like to have someone who can do the job better than me. i made that only for myself, but wanted to share that with the community, cause there was nothing really usefull to find. and without HCDR.Jacob we would still have nothing, cause i would have failed on that what we now have.

give me some more time. i´m a hardcore family father, with a 10 month old little boy and a wunderfull wife, who like what i´m doing in my freetime, cause she´s addicted to android too *chear* and of course i have a fulltime job too.

but i´m working hard in my freetime to build something that will be a good basement for evrything that comes further.

on my next 2 or 3 free days i will be have a look at the kernel. perhaps HCDR.Jacob will give me a hand on that again, so we could do a little OC and UV for better battery life and some smartass-gov tweaks.

i also set up my mac (yes shame on me i use an apple macbook to build android ;-) ) to build from source for android.

you know what that mean right? AOSP ROM ;-) or to be clear CM7 !!!
but this will take a lot of time i think. for me ;-) but let´s see what i can do for all of use until there are hardcore devs around. which would be super cool to have someone to work with...

regards



Sent from my HTC Desire S using XDA App
 

loveboatcaptain

Senior Member
Mar 9, 2010
525
616
Berlin
www.twitter.com
Sure. To test different values, just change the value of rssi_offset in calibration. Of course the wifi signal indicator will not display right until changes are made in framework if you do this.

thx a lot... i will try something that works in my kitchen. can´t live without my coffee and wifi ;-) with your fix it is nearly good for me, need´s only a littlelittle more



U lamers is too much ,should've kill the noob ? Pr just let him lie.

what is it, what you want to tell us?
 

bongo1

Senior Member
Apr 26, 2011
113
3
thx a lot... i will try something that works in my kitchen. can´t live without my coffee and wifi ;-) with your fix it is nearly good for me, need´s only a littlelittle more





what is it, what you want to tell us?


i think the fix puts the device on the limit of the hardware capability, eg. it just about holds the wifi signal even though the signal is too far for any usable data connection.
 

loveboatcaptain

Senior Member
Mar 9, 2010
525
616
Berlin
www.twitter.com
i think the fix puts the device on the limit of the hardware capability, eg. it just about holds the wifi signal even though the signal is too far for any usable data connection.

with my laptop or my wifi radio the signal is very stable...
only my desire s "thinks" the signal is to weak and change back to 3G wich isn´t so good for me cause i have a limited data plan on my provider... only 300MB a month with full speed... after that only 2G speed.

that´s because i want to tweak this. don´t think that the hardware will suckz here. the values which are used in the FIX are working better that the standard values. me for myself i only need a tiny little more.... ;-)
 

dont know

Senior Member
Feb 12, 2009
499
52
Open /system/etc/calibration as text and see if rssi_offset at the bottom of the file is equal to -20.

Is this the only thing to change?

I'm know on 1.36.415.6 odexed, so can't use your updates..

EDIT: probably not - WiFi indicator shows "nothing" but had access..
 
Last edited:

DJjay18

Senior Member
Jun 19, 2011
262
17
London
Hi there,

Reading this thread with interest - is this fix likely to work for the Incredible S? If not, is is possible to easily create a similar fix?

Thanks.
 

mociulski

Member
Feb 29, 2008
12
2
Original framework.jar

Does anyone have the original framework.jar from the stock firmware? I forgot to back it up before applying this fix and I would like to restore it.

Thank you!
 

Quark^2

Senior Member
Sep 3, 2011
219
7
I'd love to use this WiFi fix (poor WiFi at work, too much concrete), but the 2 files in the OP seem to be for older versions.
I'm running LBC MOD 0.6.0 and the calibration file already seems available:

/system/etc/calibration
rssi_offset = 0

Can I change this offset to a more suitable value? E.g. -20 or -10?
Or do I really need some updated files?
 

onlyankush_s

Senior Member
Dec 29, 2008
378
88
Kharupetia
www.ajs.shantibhog.com
Hello,
Sorry for my bad english.

i tried to apply this fix on my DS S-off by revolutionary and flash with Virtuous Unity 2.35.0 Sense 3.0 based on Pyramid.

After applying i rebooted my phone but it got stuck in White Screen with HTC logo after waiting for 15 mins i removed the battery and tried two three times but didn't work so again i had to flash the flash.

So can you please tell me if this fix can be applied or not to my DS.

thank you
 

djojogm

Member
Feb 4, 2010
27
2
Jakarta
Small update... noticed that I didn't set the permissions right on one of the files. May want to grab v2.

On another note, where is everyone? Dev community for this phone needs to wake up!

Hi, I am a bit confused out off the two zip files which one is the specifically meant for v2? Please kindly advice...

Thank you...
 

kylon

Senior Member
Dec 17, 2010
2,615
2,028
We need a guide

Sent from my HTC Desire S using XDA Premium App
 

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  • 10
    I don't even have this phone, but I'm tired of hearing you guys complain about your wifi dropping :p. HTC programmed the Desire S to drop wifi connections if the signal falls below -88db. I'm not sure why they did that because -88db is a perfectly usable signal. With this fix, your wifi connection won't drop until the signal falls below -108db.

    You need to be running a custom deodexed ROM to apply this fix.

    Flash through Clockwork Recovery.

    Let me know if it works for you!


    If you appreciate my work, donations of any amount are very much appreciated.
    2
    [PATCH] framework.jar for altering WiFi RSSI values in ICS

    /*
    * I am not responsible for bricked devices, dead SD cards,
    * thermonuclear war, or you getting fired because the alarm app failed. Please
    * do some research if you have any concerns before flashing it!
    * YOU are choosing to make these modifications, and if
    * you point the finger at me for messing up your device, I will laugh at you.
    */


    A big thanks to gtg465x, kylon and others in the forum for explaining things in posts. It's their work mostly and not mine.

    I'm writing this here just in case someone needs the info..

    Since I had a problem with the reception of WiFi signal in a Desire S and I've been searching the forum for many days to find a solution to this that I got no responce I decided to search for the framework.jar file patch that has to be done with the /etc/calibration file change to the value of rssi_offset so that Desire S won't drop the connection so easily. Tried also to contact gtg465x but I guess he's busy.

    This was done to ICE_DS 6.5 ROM

    The patch goes as this:
    (1. I am not a developer (used to code, not in android though)
    2. I modified the values only by -10 dBm just for test you can change to -20 if you like
    3. feel free to correct my wrongs)



    gtg465x describes very nicely here what needs to be done http://xdaforums.com/showthread.php?p=25174730 but this is for GB ROM
    Read carefully to edit your /etc/calibration file. In that post it's changed to -20, in my test to -10

    but ICE_DS 6.5 is a ICS ROM

    and the code in WiFiManager.smali is as follows
    (the sections that need to be edited)
    Code:
    .field private static final MAX_RSSI:I = [COLOR="Red"]-0x37[/COLOR] [COLOR="Blue"]#changed to -0x41[/COLOR]
    
    .field private static final MIN_RSSI:I = [COLOR="red"]-0x64[/COLOR] [COLOR="Blue"]#changed to -0x6e[/COLOR]

    Code:
    .method public static calculateSignalLevel(II)I
        .registers 9
        .parameter "rssi"
        .parameter "numLevels"
    
        .prologue
        const/4 v6, 0x5
    
        const/16 v5,[COLOR="Red"] -0x46[/COLOR] [COLOR="Blue"]#changed to -0x50[/COLOR]
    
        const/16 v4, [COLOR="red"]-0x50[/COLOR] [COLOR="Blue"]#changed to -0x5a[/COLOR]
    
        .line 963
        const/4 v1, 0x0
    
        .line 964
        .local v1, level:I
        const/4 v3, 0x4
    
        if-eq p1, v3, :cond_b
    
        if-ne p1, v6, :cond_23
    
        .line 965
        :cond_b
        if-lt p0, v5, :cond_13
    
        .line 966
        const/4 v1, 0x3
    
        .line 974
        :goto_e
        if-ne p1, v6, :cond_12
    
        add-int/lit8 v1, v1, 0x1
    
        .line 986
        :cond_12
        :goto_12
        return v1
    
        .line 967
        :cond_13
        if-ge p0, v5, :cond_19
    
        if-lt p0, v4, :cond_19
    
        .line 968
        const/4 v1, 0x2
    
        goto :goto_e
    
        .line 969
        :cond_19
        if-ge p0, v4, :cond_21
    
        const/16 v3, [COLOR="red"]-0x55[/COLOR] [COLOR="Blue"]#changed to -0x5f[/COLOR]
    
        if-lt p0, v3, :cond_21
    
        .line 970
        const/4 v1, 0x1
    
        goto :goto_e
    
        .line 972
        :cond_21
        const/4 v1, 0x0
    
        goto :goto_e
    
        .line 976
        :cond_23
        const/16 v3, [COLOR="red"]-0x64[/COLOR] [COLOR="Blue"]#changed to -0x6e[/COLOR]
    
        if-gt p0, v3, :cond_29
    
        .line 977
        const/4 v1, 0x0
    
        goto :goto_12
    
        .line 978
        :cond_29
        const/16 v3, [COLOR="red"]-0x37[/COLOR] [COLOR="Blue"]#changed to -0x41[/COLOR]
    
        if-lt p0, v3, :cond_30
    
        .line 979
        add-int/lit8 v1, p1, -0x1
    
        goto :goto_12
    
        .line 981
        :cond_30
        const/high16 v0, 0x4234
    
        .line 982
        .local v0, inputRange:F
        add-int/lit8 v3, p1, -0x1
    
        int-to-float v2, v3
    
        .line 983
        .local v2, outputRange:F
        add-int/lit8 v3, p0, 0x64
    
        int-to-float v3, v3
    
        mul-float/2addr v3, v2
    
        div-float/2addr v3, v0
    
        float-to-int v1, v3
    
        goto :goto_12
    .end method


    this translates to java as (the original values)
    Code:
     public static int calculateSignalLevel(int paramInt1, int paramInt2)
      {
        if ((paramInt2 == 4) || (paramInt2 == 5))
        {
          int i;
          if (paramInt1 >= -70)
            i = 3;
          for (;;)
          {
            if (paramInt2 == 5)
              i++;
            return i;
            if ((paramInt1 < -70) && (paramInt1 >= -80))
              i = 2; else if ((paramInt1 < -80) && (paramInt1 >= -85))
              i = 1; else
              i = 0;
          }
        }
        if (paramInt1 <= -100)
          return 0;
        if (paramInt1 >= -55)
          return paramInt2 - 1;
        return (int)((paramInt2 - 1) * (paramInt1 + 100) / 45.0F);
      }


    There is also another section in WiFiManager.smali called calculateSignalLevel(III)I
    Code:
    .method public static calculateSignalLevel(III)I
        .registers 7
        .parameter "rssi"
        .parameter "numLevels"
        .parameter "frequency"
    
        .prologue
        const/16 v3, -0x41
    
        const/16 v2, -0x46
    
        .line 2027
        const/16 v1, 0x1324
    
        if-le p2, v1, :cond_22
    
        .line 2028
        const/4 v0, 0x0
    
        .line 2029
        .local v0, level:I
        if-lt p0, v3, :cond_12
    
        .line 2030
        const/4 v0, 0x3
    
        .line 2038
        :goto_c
        const/4 v1, 0x5
    
        if-ne p1, v1, :cond_11
    
        add-int/lit8 v0, v0, 0x1
    
        .line 2041
        .end local v0           #level:I
        :cond_11
        :goto_11
        return v0
    
        .line 2031
        .restart local v0       #level:I
        :cond_12
        if-ge p0, v3, :cond_18
    
        if-lt p0, v2, :cond_18
    
        .line 2032
        const/4 v0, 0x2
    
        goto :goto_c
    
        .line 2033
        :cond_18
        if-ge p0, v2, :cond_20
    
        const/16 v1, -0x4b
    
        if-lt p0, v1, :cond_20
    
        .line 2034
        const/4 v0, 0x1
    
        goto :goto_c
    
        .line 2036
        :cond_20
        const/4 v0, 0x0
    
        goto :goto_c
    
        .line 2041
        .end local v0           #level:I
        :cond_22
        invoke-static {p0, p1}, Landroid/net/wifi/WifiManager;->calculateSignalLevel(II)I
    
        move-result v0
    
        goto :goto_11
    .end method

    which reads as:

    Code:
      public static int calculateSignalLevel(int paramInt1, int paramInt2, int paramInt3)
      {
        if (paramInt3 > 4900)
        {
          int i;
          if (paramInt1 >= -65)
            i = 3;
          for (;;)
          {
            if (paramInt2 == 5)
              i++;
            return i;
            if ((paramInt1 < -65) && (paramInt1 >= -70))
              i = 2; else if ((paramInt1 < -70) && (paramInt1 >= -75))
              i = 1; else
              i = 0;
          }
        }
        return calculateSignalLevel(paramInt1, paramInt2);
      }

    but I have the believe (which I may well be wrong) that has to do something about WiMax (if (paramInt3 > 4900)) so I didn't touch that.
    2
    Ok, checked the file and it's possible but a bit hard using init.rc.
    Another way, download the attached file, extract it, open the extracted file and replace the PATHTOCALIBRATIONFILE with the correct path inclusive filename, afterwards copy it to your /etc/init.d folder and set the correct permissions (r-xr-xr-x or 555 or everyone execute and read), this will write at startup the fitting values to the calibration file.
    2
    Grab Root Browser its free

    Sent from my Desire S using XDA
    1
    Small update... noticed that I didn't set the permissions right on one of the files. May want to grab v2.

    On another note, where is everyone? Dev community for this phone needs to wake up!