X-Git-Url: https://git.cweiske.de/usb-wde1-tools.git/blobdiff_plain/56195e5b21309d1de06963162f26a90f90fb4895..03d116150a55c5694e255adccb09ac8af388f977:/README.rst

diff --git a/README.rst b/README.rst
index f8d281d..9467f8e 100644
--- a/README.rst
+++ b/README.rst
@@ -12,45 +12,67 @@ Idea
 
 Setup
 =====
-0. Checkout the munin plugin code:
+0. Checkout the munin plugin code::
+
    $ cd /usr/local/src
    $ git clone git://git.cweiske.de/usb-wde1-tools.git
    $ cd usb-wde1-tools
 
 1. A process needs to watch the USB interface and log the last
    line with temperature data into a log file.
-   You can do that manually with
-   $ socat /dev/ttyUSB0,b9600 STDOUT |./munin/log-single-line.sh test.log
+   You can do that manually with ::
+
+     $ socat /dev/ttyUSB0,b9600 STDOUT |./munin/log-single-line.sh test.log
+
+   The most easy way is to run ::
+
+     $ cd munin && nohup ./usb-wde1-log-last.sh &
 
-   The most easy way is to run
-   $ 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.
 
-2. Link the munin plugin:
+   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:
-   [usb-wde1_*]
-   env.logfile /tmp/usb-wde1-last
-   env.host_name House
-   env.sensors 0 1 7
-   env.sensor0 Living room
-   env.sensor1 Kitchen
-   env.sensor7 Outside
-
-4. Try it:
-   $ munin-run usb-wde1_temperature autoconf
-    - should echo "yes"
-   $ munin-run usb-wde1_temperature config
-    - should display the plugin configuration with all environment variables
-      set
-   $ munin-run usb-wde1_temperature
-   $ munin-run usb-wde1_humidity
-    - should display the current values from the log file
+3. Configure the plugins:
+
+   Edit ``/etc/munin/plugin-conf.d/munin-node`` and add the following lines::
+
+     [usb-wde1_*]
+     env.logfile /var/spool/usb-wde1/usb-wde1-last
+     env.host_name House
+     env.sensors 0 1 7
+     env.sensor0 Living room
+     env.sensor1 Kitchen
+     env.sensor7 Outside
+
+4. Try it::
+
+     $ munin-run usb-wde1_temperature autoconf
+
+   should echo "yes"
+   ::
+
+     $ munin-run usb-wde1_temperature config
+
+   should display the plugin configuration with all environment variables set
+   ::
+
+     $ munin-run usb-wde1_temperature
+     $ munin-run usb-wde1_humidity
+
+   should display the current values from the log file
 
 5. You are done - enjoy.
 
@@ -59,29 +81,35 @@ Setup
 Debugging & Development
 =======================
 The dummy data generator is a small php script that generates log lines
-as they would come from the usb-wde1 usb port:
-$ ./dummy-data-generator.php |./munin/log-single-line.sh test.log
+as they would come from the usb-wde1 usb port::
 
-Local (non-installed) plugin setup:
-$ cd munin
-$ ln -s usb-wde1_ usb-wde1_temperature
-$ ln -s usb-wde1_ usb-wde1_humidity
-$ cd ..
+  $ ./dummy-data-generator.php |./munin/log-single-line.sh test.log
+
+Local (non-installed) plugin setup::
+
+  $ cd munin
+  $ ln -s usb-wde1_ usb-wde1_temperature
+  $ ln -s usb-wde1_ usb-wde1_humidity
+  $ cd ..
 
 
 Running the munin plugin for development purposes is also relatively easy
 since you can pass the environment configuration variables
-from the munin configuration on the command line:
-$ logfile=test.log sensors="0 1 7" ./munin/usb-wde1_temperature
+from the munin configuration on the command line::
+
+  $ logfile=test.log sensors="0 1 7" ./munin/usb-wde1_temperature
 
 When you have problems running the munin plugin, try to
-remove the line 
- env.host_name House
-from file usb-wde1_
+remove the line ::
+
+  env.host_name House
+
+from file ``usb-wde1_``
 
 
 Permission errors
 -----------------
+::
 
     cu: open (/dev/ttyUSB0): Permission denied
     cu: /dev/ttyUSB0: Line in use
@@ -100,3 +128,32 @@ Install PHP and the PHP rrd extension (``pear install pecl/rrd``) to make it
 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``.