$ cd munin && nohup ./usb-wde1-log-last.sh &
- once. It backgrounds the logging process and logs into /tmp/usb-wde1-last.
+ once. It backgrounds the logging process and logs into ``/var/spool/usb-wde1/usb-wde1-last``.
This process needs to be started whenever the machine is rebooted.
+ The ``systemd/`` directory contains a ``usb-wde1-log.service`` file you can copy to
+ ``/etc/systemd/system/``. After copying it, run::
+
+ $ systemctl daemon-reload
+ $ systemctl start usb-wde1-log
+ $ systemctl status usb-wde1-log
+ $ systemctl enable usb-wde1-log
+
2. Link the munin plugin::
$ cd /etc/munin/plugins
$ ln -s /usr/local/src/usb-wde1-tools/munin/usb-wde1_ usb-wde1_temperature
$ ln -s /usr/local/src/usb-wde1-tools/munin/usb-wde1_ usb-wde1_humidity
-3. Configure the plugins
- Edit /etc/munin/plugin-conf.d/munin-node and add the following lines::
+3. Configure the plugins:
+
+ Edit ``/etc/munin/plugin-conf.d/munin-node`` and add the following lines::
[usb-wde1_*]
- env.logfile /tmp/usb-wde1-last
+ env.logfile /var/spool/usb-wde1/usb-wde1-last
env.host_name House
env.sensors 0 1 7
env.sensor0 Living room
work.
Run ``gen-html.php`` every 5 minutes.
+
+
+Static USB device name
+======================
+When you have multiple serial USB devices attached to the computer,
+rebooting may lead to switched ttyUSB* numbers.
+
+A solution is to define a udev rule in ``/etc/udev/rules.d/99-usb-wde1.rules``::
+
+ SUBSYSTEM=="tty", ATTRS{serial}=="XQJ2EJEMADDFYBD3", SYMLINK+="usbwde1"
+
+You can find the serial number in ``dmesg`` output::
+
+ usb 1-3: new full-speed USB device number 2 using xhci_hcd
+ usb 1-3: New USB device found, idVendor=10c4, idProduct=ea60, bcdDevice= 1.00
+ usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
+ usb 1-3: Product: ELV USB-WDE1 Wetterdatenempfänger
+ usb 1-3: Manufacturer: Silicon Labs
+ usb 1-3: SerialNumber: XQJ2EJEMADDFYBD3
+
+After creating the file, activate it::
+
+ $ udevadm control --reload
+ $ udevadm trigger
+
+Now a file ``/dev/usbwde1`` exists.
+
+Modify ``munin/usb-wde1-log-last.sh`` to use the new device file instead
+of ``ttyUSB0``.