Configure and connect tata photon plus in debian 7

The 3G dongle of tata photon+ (Huwaei EC1260) might not work by default in debian 7, and other linux distros. Here is how to get it working.

The first step is to install the packages, if not already installed.

usb-modeswitch usb-modeswitch-data

sudo dpkg -i usb-modeswitch sudo dpkg -i usb-modeswitch-data

Once the two packages have been installed successfully, next we need to install wvdial

sudo dpkg -i wvdial

After installing the pakcage, insert the dongle.

Now open a terminal and type the command

$ sudo wvdialconf /etc/wvdial.conf

We will see an output as below

Editing `/etc/wvdial.conf'. Scanning your serial ports for a modem. Modem Port Scan<*1>: S0 S1 S2 S3 ttyUSB0<*1>: ATQ0 V1 E1 -- OK ttyUSB0<*1>: ATQ0 V1 E1 Z -- OK ttyUSB0<*1>: ATQ0 V1 E1 S0=0 -- ATQ0 V1 E1 S0=0 ttyUSB0<*1>: ATQ0 V1 E1 &C1 -- OK ttyUSB0<*1>: ATQ0 V1 E1 &C1 &D2 -- OK ttyUSB0<*1>: ATQ0 V1 E1 &C1 &D2 +FCLASS=0 -- OK ttyUSB0<*1>: Modem Identifier: ATI -- Manufacturer: +GMI: HUAWEI TECHNOLOGIES CO., LTD ttyUSB0<*1>: Speed 9600: AT -- OK ttyUSB0<*1>: Max speed is 9600; that should be safe. ttyUSB0<*1>: ATQ0 V1 E1 &C1 &D2 +FCLASS=0 -- ATQ0 V1 E1 &C1 &D2 +FCLASS=0 ttyUSB0<*1>: failed with 9600 baud, next try: 9600 baud ttyUSB0<*1>: ATQ0 V1 E1 &C1 &D2 +FCLASS=0 -- OK ttyUSB1<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud ttyUSB1<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 9600 baud ttyUSB1<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up. ttyUSB2<*1>: ATQ0 V1 E1 -- OK ttyUSB2<*1>: ATQ0 V1 E1 Z -- OK ttyUSB2<*1>: ATQ0 V1 E1 S0=0 -- OK ttyUSB2<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK ttyUSB2<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK ttyUSB2<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK ttyUSB2<*1>: Modem Identifier: ATI -- Manufacturer: +GMI: HUAWEI TECHNOLOGIES CO., LTD ttyUSB2<*1>: Speed 9600: AT -- OK ttyUSB2<*1>: Max speed is 9600; that should be safe. ttyUSB2<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK Found a modem on /dev/ttyUSB0. Modem configuration written to /etc/wvdial.conf. ttyUSB0<Info>: Speed 9600; init "ATQ0 V1 E1 &C1 &D2 +FCLASS=0" ttyUSB2<Info>: Speed 9600; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0

The fourth line from below recognizes our dongle as the device /dev/ttyUSB0

Next we need to configure the wvdial application to allow it use the dongle to connect to the internet.

For doing this we need to open the wvdial.conf file located in /etc/wvdial.conf

$ gedit /etc/wvdial.conf’

By default the file will look some thing like below

[Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 &C1 &D2 +FCLASS=0 Modem Type = Analog Modem ISDN = 0 New PPPD = yes ; Phone = < Target phone number> Modem = /dev/ttyUSB0 ;Username = <Type the username> ;Password = <Type the password> Baud = 9600

Delete the ";" at the beginning of the lines "Phone","Username", and "Password". and replace the three lines with

Phone = #777 Username = internet Password = internet

Then add the following lines to the file at the end.

Init3 = AT+CRM=1 Stupid Mode = 1

The edited wvdial.conf looks as below.

[Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 &C1 &D2 +FCLASS=0 Modem Type = Analog Modem ISDN = 0 New PPPD = yes Phone = #777 Modem = /dev/ttyUSB0 Username = internet Password = internet Baud = 9600 Init3 = AT+CRM=1 Stupid Mode = 1

Save the file and close it. Now go back to the terminal and type the command

$ wvdial --> WvDial: Internet dialer version 1.61 --> Initializing modem. --> Sending: ATZ ATZ OK --> Sending: ATQ0 V1 E1 &C1 &D2 +FCLASS=0 ATQ0 V1 E1 &C1 &D2 +FCLASS=0 OK --> Sending: AT+CRM=1 AT+CRM=1 OK --> Modem initialized. --> Sending: ATDT#777 --> Waiting for carrier. ATDT#777 CONNECT ^HRSSILVL:80 ~[7f]}#@!}!})} }9}"}&} } } } }#}%B#}%}%}&@}*vO}'}"}(}"m.~~[7f]}#@!}!}*} }9}"}&} } } } }#}%B#}%}%}&@}*vO}'}"}(}"!C~ --> Carrier detected. Starting PPP immediately. --> Starting pppd at Tue May 27 14:06:08 2014 --> Pid of pppd: 13443 --> Using interface ppp0 --> pppd: (��[08]@��[08][08]��[08] --> pppd: (��[08]@��[08][08]��[08] --> pppd: (��[08]@��[08][08]��[08] --> pppd: (��[08]@��[08][08]��[08] --> pppd: (��[08]@��[08][08]��[08] --> local IP address 14.96.94.229 --> pppd: (��[08]@��[08][08]��[08] --> remote IP address 172.23.130.4 --> pppd: (��[08]@��[08][08]��[08] --> primary DNS address 103.8.46.5 --> pppd: (��[08]@��[08][08]��[08] --> secondary DNS address 103.8.45.5 --> pppd: (��[08]@��[08][08]��[08]

Now open a browser and start browsing.

Note that before running the command wvdial in the last step, turn off mobile broadband in the gui mode.

error: function declaration isn’t a prototype [-Werror=strict-prototypes]

While compiling kernel modules, or any c program, we might at times come across the error

error: function declaration isn’t a prototype [-Werror=strict-prototypes]

This error is being shown for the function declaration

void hello();

Though the syntax looks fine, the compiler is expecting us to pass "void" in case we are not passing any arguments to the function. That is we need to modify the above function to

void hello(void); After the above change, we should not get the above error.

Creating jigsaw of image using gimp

Using GIMP any photo can be made to look like a jigsaw puzzle easily. Let us take the following image for an example.

Launch gimp and click on

File->open



Browse to location where the image is stored and open it in gimp.



Now click on

Filters->Render->Patterns->Jigsaw.



The following window will appear.



The number of tiles option lets us choose the number of horizontal and vertical divisions that are needed for the image, higher these numbers more the number of jigsaw pieces will appear on the image.

Bevel width allows us to choose the degree of slope of each pieces's edge

Highlight lets us choose how strongly should the pieces appear in the image.

Style of the jigsaw pieces can be set to either square or curved.

Click on OK after setting the required options.

The image should appear as below depending on what values were set in the options.

Seperating pdf into single pages using pdfseperate in linux

pdfseperate: A tool than can be used to split a pdf document into individual pages or can be used to extract a set of pages as individual pages from a pdf document.

Let us say we have a document named hello.pdf, that has 100 pages and we need to extract the pages 20 to 22 as individual pages. We can use pdfseperate to achieve this.

$ pdfseperate -f 20 -l 30 hello.pdf foo%

After the execution of the command, we should have three files foo1.pdf,foo2.pdf and foo3.pdf which will be the 20th,21st and 22nd page of the hello.pdf document.

If pdfseperate is not available, we need to install the package poppler-utils, for debian based systems

$ sudo apt-get install poppler-utils