Difference between revisions of "Ericsson F3507g Mobile Broadband Module"
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==Scripting everything== | ==Scripting everything== | ||
− | On my {{X301}} I have a simple script to power up and initialise the 3G device, dial out with wvdial and then power everything down again when I've finished online. This is worth doing because on the {{X301}} running the 3G device increases the power consumption by more than 10% (note: I have not tested how much more power is used if the device is in low power mode but it seems sensible to assume it is more than zero). I am using a UK spec {{X301}} with the supplied Vodafone SIM card. I needed to activate the SIM card on the Vodafone web site before this would work. | + | On my {{X301}} I have a simple script to power up and initialise the 3G device, dial out with wvdial and then power everything down again when I've finished online. This is worth doing because on the {{X301}} running the 3G device increases the power consumption by more than 10% (note: I have not tested how much more power is used if the device is not online and configured in low power mode, but it seems sensible to assume it is more than zero). I am using a UK spec {{X301}} with the supplied Vodafone SIM card. I needed to activate the SIM card on the Vodafone web site before this would work. |
This script works fine on Debian but may require changes for other distributions. | This script works fine on Debian but may require changes for other distributions. |
Revision as of 21:21, 29 November 2008
Even though Ericsson claims that their F3507g MiniPCIe WWAN/GPS card is compartible with Linux, they do not provide any information how to make this card work. Here are some basics:
- the card will not work without inserted SIM, even the GPS function. If you want to use just GPS, any SIM would work, even if it is not attached to any active account with any GSM provider.
- the card provides USB interface, and is recognized by cdc_acm kernel module
- it registers three pseudo-TTY's, in my case /dev/ttyACM0, /dev/ttyACM1 and /dev/ttyACM2
- the card is controlled by sending AT-commands to one of it's pseudo-TTY's
- it applears that all three TTY's are identical. So, for example, we can use /dev/ttyACM0 for broadband 3G, /dev/ttyACM1 for controlling the card via AT-commands, and /dev/ttyACM2 for GPS, or in any other order.
Contents
Activating the card
Before the card can be used, you have to activate it. It is done by sending
AT+CFUN=1
to /dev/ttyACM1. The responce should be
OK
You can do it with any terminal terminal program like "minicom", or using "cu" in "expect" script as here. But we are not done yet. If you SIM is protected by a PIN-code, we may have to unlock it. This is done by sending
AT+CPIN="YOUR-PIN"
to /dev/ttyACM1. If your SIM is not protected by a PIN-code, or it is configured not to require one on connecting to the network, the last command is not necessary. Anyway, your card is not active until it responds with
+PACSP0
Don't try to do anything until you see it.
Turning the card off
To put the card into energy-saving mode (this is the default), you can send
AT+CFUN=4
to /dev/ttyACM1. To remove all power from the card, send
AT+CFUN=0
to /dev/ttyACM1. Be carefull with the last command. It turns the card completely off, and it will no longer accept any AT-commands before the hard reset (which can be done either by rebooting the computer, or physically removing the power from the card).
Using the card as a wireless modem
Once the card is active, we can use it to connect to 3G network in the same way as any GPRS modem. For example to connect to AT&T Wireless network, your wvdial.conf would have to be something like this
[Dialer att] Modem = /dev/ttyACM0 Init1 = AT+CGDCONT=1,"IP","proxy" Stupid mode = 1 phone= *99# Username = * Password = *
Using the card as GPSr
Once the card is active, we can use it to get GPS info via NMEA protocol. First, you have to configure the a few NMEA options. It is done by sending
AT*E2GPSCTL=X,Y,Z
to /dev/ttyACM1. Here
- X can be 0 (NMEA stream turned off) or 1 (NMEA stream turned on)
- Y can be an integer form 1 to 60, and sets the frequency of how often the card emits the NMEA sentences
- Z can be 0 (DGPS is turned off) or 1 (DGPS is turned on)
so, to configure the GPSr to update every 5 seconds, and turn DGPS on, you would send
AT*E2GPSCTL=1,5,1
to /dev/ttyACM1. Once the GPSr is configured, we can get the NMEA stream on /dev/ttyACM2 by sending
AT*E2GPSNPD
to /dev/ttyACM2. Once you do that, /dev/ttyACM2 will no longer accept any new AT-commands. But you still can change the the behavior of the NMEA stream by sending the appropriate
AT*E2GPSCTL=X,Y,Z
to /dev/ttyACM1. Now you can read the NMEA stream by saying
cat /dev/ttyACM2
or better yet, start gpsd interface on /dev/ttyACM2.
Other thoughts
While "AT+CFUN=*" and "AT+CPIN=*" are pretty standard commands for wireless modems and are well-documented (e.g. here and here), it appears that the commands "AT*E2GPSCTL" and "AT*E2GPSNPD" are unique for Ericsson F3507g card. All credit for discovering them goes to N Z who left a comment in this thread. I imagine one could find them via a USB sniffer on a working Windows machine (or a Linux machine with Windows running in a virtual machine). Another way to get them it to try to look for "gps" string in Windows drivers. What is interesting, is that F3507g supports few other AT-commands with "GPS" substring (you can get all supported AT-commands by sending "AT*" to /dev/ttyACM1 after activating it with "AT+CFUN=1").
Scripting everything
On my X301 I have a simple script to power up and initialise the 3G device, dial out with wvdial and then power everything down again when I've finished online. This is worth doing because on the X301 running the 3G device increases the power consumption by more than 10% (note: I have not tested how much more power is used if the device is not online and configured in low power mode, but it seems sensible to assume it is more than zero). I am using a UK spec X301 with the supplied Vodafone SIM card. I needed to activate the SIM card on the Vodafone web site before this would work.
This script works fine on Debian but may require changes for other distributions.
First you need to install the "ppp", "sysfsutils" and "wvdial" packages with
apt-get install ppp wvdial sysfsutils
I use sysfsutils to completely power off the 3G WWAN device on boot, in order to save power. I also power off the bluetooth, disable the white LED in the power button, and instruct the kernel to use the "noop" scheduler for the SSD. Edit /etc/sysfs.conf to look like this:
block/sda/queue/scheduler = noop devices/platform/thinkpad_acpi/bluetooth_enable = 0 devices/platform/thinkpad_acpi/wwan_enable = 0 class/leds/tpacpi::power/brightness = 0
These will now be applied on boot, but when the laptop wakes from sleep the BIOS seems to undo some of these settings, so create a script named "/etc/pm/sleep.d/sysfsutils":
#!/bin/bash case $1 in (hibernate|suspend) ;; (thaw|resume) /etc/init.d/sysfsutils start ;; *) echo "somebody is calling me totally wrong." ;; esac
Don't forget to "chmod a+x /etc/pm/sleep.d/sysfsutils". This script will be called when the laptop wakes up and it will power-off the 3G WWAN device again.
Now we need to set up "wvdial" to work with the 3G WWAN device. Edit /etc/wvdial.conf to look like this:
[Dialer 3G] Modem = /dev/ttyACM0 Init1 = AT+CGDCONT=1,"IP","Internet" Stupid mode = 1 phone= *99# Username = * Password = *
If you are using a SIM from a mobile provider other than Vodafone UK you may need to change the access point name (APN) in the Init1 string. I found that Vodafone UK uses the APN "Internet" and T-mobile use the APN "general.t-mobile.uk", presumably other providers also use different APN values.
Edit /etc/ppp/peers/wvdial to look like this:
noauth name wvdial usepeerdns noccp novj novjccomp
Create a file called "/usr/local/bin/3g-dialup" containing the following:
#!/bin/sh WWANDEVICE=/dev/ttyACM2 ## Check we have appropriate permissions if [ `whoami` != "root" ]; then echo Run this script as root exit 0 fi ## Enable the WWAN hardware echo -n "Powering up WWAN device .." echo 1 > /sys/devices/platform/thinkpad_acpi/wwan_enable while [ ! -c $WWANDEVICE ]; do sleep 0.5; echo -n "."; done echo " OK" echo -n "Initialising WWAN modem ..." /usr/sbin/chat -v "" "AT+CFUN=1" "+PACSP0" "AT" "OK" > $WWANDEVICE < $WWANDEVICE echo " OK" echo "Starting PPP -- hit Ctrl+C when finished" /usr/bin/wvdial 3G echo -n "Shutting down WWAN modem ..." /usr/sbin/chat -v "" "AT+CFUN=4" "OK" > $WWANDEVICE < $WWANDEVICE echo " OK" ## Disable the WWAN hardware, save power echo -n "Powering down WWAN device .." echo 0 > /sys/devices/platform/thinkpad_acpi/wwan_enable while [ -c $WWANDEVICE ]; do sleep 0.5; echo -n "."; done echo " OK"
You'll need to make this script executable with "chmod a+x /usr/local/bin/3g-dialup".
Now I can fire up a 3G connection trivially with "sudo 3g-dialup" in an xterm. Once pppd has acquired an IP address you can use the Internet. Once you're finished simply hit Ctrl+C in the xterm and it will close the PPP session and power down the modem again. It's probably a good idea to shut down the connection in this way before you put the laptop to sleep.