Setting up 3G dongle/USB Modems for linux
In some places, 3G USB modems might be only way to connect our servers to internet. Below is a guideline to install and use 3G dongles in linux.
Install wvdial to be used for dialing 3G modem
yum install wvdial
Now create a configuration file for wvdial in ‘/etc/wvdial.conf'
vi /etc/wvdial.confDialer Defaults
[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2
Init3 = AT+CGDCONT=1,"IP”,"<APN of Internet provider>"
Stupid Mode = 1
Modem Type = USB Modem
New PPPD = no
Modem = /dev/ttyUSB2
ISDN = 0
Auto Reconnect = 1
Phone = *99#
Username = <Provider username>
Password = <Provider password>
Baud = 460800
Carrier Check = no
Install required libraries and tools.
yum install tcl usbutils libusb1-devel
Download usb_modeswitch and usb_modeswitch_data
Download using wget command
wget http://www.draisberghof.de/usb_modeswitch/usb-modeswitch-data-20151101.tar.bz2 #or latest
wget http://www.draisberghof.de/usb_modeswitch/usb-modeswitch-2.2.6.tar.bz2 #or latest
Extract and install
tar xvfj usb-modewitch-2.2.6.tar.bz2
tar xvfj usb-modewitch-data-20151101.tar.bz2
cd usb-modewitch-2.2.6
make install
cd usb-modewitch-data-20151101
make install
usb_modeswitch creates some udev rules to automatically change the mode of 3G dongle to act as usb_modem
Now plug in your 3G dongle, it should automatically be detected.
dmesg | grep tty # should show something like 'GSM modem (1-port) converter now attached to ttyUSB0'
sudo wvdial &
Now this should start dialing via 3G modem, and internet should be started.
For more info - http://www.draisberghof.de/usb_modeswitch/
Comments
Your question doesn't really sound like a Bahmni specific question – seems like you are asking for how do I setup "internet" access on a Centos Linux box. Is that your question? Can you please clarify. Thanks.
Yeah, that is my question. It is not Bahmni specific question, but it is related to this page. This page talks about setting up 3G dongles in linux. I think if we want to follow above steps, we will need an internet connection on that box already.
I see. The use case here is that if a hospital is planning to carry a Laptop to a remote location for capturing data, then they might want to setup a 3G dongle on it, so that in remote places they can use the 3G dongle. Within the hospital the expectation was that you would have network/wifi based internet, and hence you can setup this configuration in the hospital before you leave.
How will we be able to setup if we don't have an internet connection at all on that machine? It will be better if we can write down the steps to setup internet when setting up a new box. We won't have an internet connection on that that Linux box, but my laptop will have.