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<h3>fhem.pl - Hints for GNU/Linux</h3>
Version: <b>EN</b>&nbsp;<a href="linux_DE.html">DE</a>
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<h2>fhem.pl - Hints for GNU/Linux</h2>
<table border=1><tr><td>
Note: Depending on the GNU/Linux distribution (Debian, openSuSE, etc.) and
version of the Linux kernel you may or <i>may not</i> have to do the
following steps.<br>
It is worth giving it a try without any modifications <b>first</b>.<br> We
have convinced the kernel developers to enable all (currently known) ELV
devices by default. Starting with kernel 2.6.24.2 (e.g. openSUSE 11) the
changes below are <b>not</b> required. You can check your running kernel
version using the command:
<code><br>uname -r<br></code>
</td></tr></table>
<hr>
<p><b><a name="onedevice">One device</a></b><br>
If you connect one USB device (FHZ1000PC, FHZ1300PC, EM1010PC, WS300, ...) to
your GNU/Linux server you can use the regular <i>ftdi_sio</i> kernel module.
However, it may not recognize our device. Therefore you need to get the
<i>vendor</i> and <i>product</i> codes:
<code><br>
# lsusb<br>
...<br>
Bus 002 Device 002: ID <b>0403</b>:<b>e0e8</b> Future Technology Devices International, Ltd <br>
...<br>
</code><br>
Now you need to edit your <code>/etc/modprobe.conf</code> or
<code>/etc/modprobe.conf.local</code> file (depending on your distribution).
Add the following line to it:<br>
<code><br>
options ftdi_sio vendor=0x<b>0403</b> product=0x<b>e0e8</b><br>
</code><br>
Replace the vendor and product code with the output of the <i>lsusb</i>
command. The you load the module using:<br>
<code><br>
# modprobe ftdi_sio<br>
</code><br>
<hr>
<p><b><a name="multipledevices">Multiple devices</a></b><br>
If you're using multiple USB devices (FHZ1000PC, FHZ1300PC, EM1010PC, WS300,
...) you cannot use the method above. You need to modify the ftdi_sio kernel
module to make it work. The following example was done with openSuSE 10.1:<br>
You need to have the kernel-source-<i>version</i> RPM of your current kernel
(see output of <code>uname -r</code>) installed.<br>
<code><br>
# cd /usr/src/linux<br>
# make cloneconfig<br>
# make modules_prepare<br>
# cp /boot/symvers-2.6.*-default.gz /usr/src/linux<br>
# mv symvers-2.6.*-default.gz Module.symvers.gz<br>
# gunzip /usr/src/linux/Module.symvers.gz<br>
# make modules_prepare<br>
# cd drivers/usb/serial<br>
</code>
For the EM1010PC you (may) need to add the following line:
<code><br>
# vi ftdi_sio.h<br>
...<br>
#define FTDI_ELV_WS500_PID 0xE0E9 /* PC-Wetterstation (WS 500) */<br>
<b>#define FTDI_ELV_EM1010PC_PID 0xE0EF /* EM 1010 PC */</b><br>
</code><br>
Now we need to uncomment some lines to enable all of our devices.
<code><br>
# vi ftdi_sio.c<br>
...<br>
{ USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, <br>
{ USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },<br>
{ USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, <br>
{ USB_DEVICE(FTDI_VID, FTDI_ELV_EM1010PC_PID) },<br>
...<br>
</code><br>
Remove the <b>/*</b> and <b>*/</b> of your devices and save the file.
<br>
<code>
# cd /usr/src/linux<br>
</code>
Now you have 3 choices:<br>
<table border=1>
<tr><td>
<code>
# mv Module.symvers Module.symvers.notneeded<br>
# make M=drivers/usb/serial</code>
<td>
... to build the modules for all of <i>usb serial</i>.<br>
If you have a less powerful machine like the ARM-Based NSLU2 then it is
sufficient to only build the required module.
</td></tr>
<td><code>
# make modules</code>
</td><td>
... to build all modules (takes a long time).
</td></tr>
<tr><td>
<code>
# make driver/usb/serial/ftdi_sio.ko
</code>
</td><td>
... to build just the <i>ftdi_sio.ko</i> module. However, this does not seem
to be working always.
</td></tr>
</table>
Once you have the module:<br>
<code><br>
# cd /lib/modules/<i>yourKernelVerion</i>/kernel/drivers/usb/serial<br>
# cp ftdi_sio.ko ftdi_sio.ko_backup<br>
# cp /usr/src/linux/drivers/usb/serial/ftdi_sio.ko .<br>
</code><br>
To activete it you may need to stop applications (like fhem) who
are using the /dev/ttyUSB device and unload the module and load it again.<br>
<code><br>
# rmmod ftdi_so<br>
# modprobe ftdi_so<br>
</code><br>
You should now see multiple ttyUSB devices:
<code><br>
# ls -l /dev/ttyUSB*<br>
crw-rw---- 1 root uucp 188, 0 2007-02-11 23:00 /dev/ttyUSB0<br>
crw-rw---- 1 root uucp 188, 1 2007-02-11 23:00 /dev/ttyUSB1<br>
</code><br>
<hr>
<p><b><a name="devicelinks">Device links</a></b><br>
If you're using multiple USB devices (FHZ, EM, WS...) it might occur that the
enumeration of the /dev/ttyUSB<i>n</i> numbers get mixed up if one of the
device is missing or after a reboot.<br> Starting with kernel 2.6 the UDEV
implements means for using virtual names instead of the bare numbers.<br>
Edit the file <code>/etc/udev/rules.d/10-udev.rules</code> (create if
necessary) and insert the following lines: <br>
If you use udev prior to version 103:<br>
<code>
KERNEL=="ttyUSB*", SYSFS{product}=="ELV FHZ 1300 PC", SYMLINK+="elv_fhz1300pc"<br>
KERNEL=="ttyUSB*", SYSFS{product}=="ELV EM 1010 PC", SYMLINK+="elv_em1010pc"<br>
</code><br>
Starting with udev 103 the SYSFS will be replaced by ATTRS:
<br>
<code>
KERNEL=="ttyUSB*", ATTRS{product}=="ELV FHZ 1300 PC", SYMLINK+="elv_fhz1300pc"<br>
KERNEL=="ttyUSB*", ATTRS{product}=="ELV EM 1010 PC", SYMLINK+="elv_em1010pc"<br>
</code><br>
Now you need to reload (rmmod/modprobe) the ftdio_sio kernel module to
use the device paths <code><b>/dev/elv_fhz1300pc</b></code> or
<code><b>/dev/elv_em1010pc</b></code> in your FHEM configuration file.
<hr>
<p><b><a name="log">Perl Device::SerialPort</a></b><br>
On debian you may install the missing Device::SerialPort package with:
<pre>
apt-get install libdevice-serialport-perl
</pre>
<hr>
<p><b><a name="log">Logfile config</a></b><br>
For a weekly fhem.log rotation add to /etc/logrotate.conf:<br>
<pre>
/var/log/fhem.log {
missingok
weekly
copytruncate
rotate 5
compress
}
</pre>
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