FHEM FAQ

Stop fhem.pl, delete the previous .save file and restart fhem.pl. If the problem still exists, send a bugreport.

The protocol used by the FS20 family is quite simple: it is not encrypted in any way, and there is no feedback to the sender. So if you push any buttons on a pure receiver, no radio waves will be sent out, and the FHZ1000 won't notice anything. The FHZ1000PC does not even know if somebody received its message, it simply sends it out 3 times and hopes for good luck.
To answer the question: it is not a bug :-)

If you already programmed some devices, then just start fhem.pl with one of the example configuration files, and watch the log. When activating a deivce (e.g. with the remote) then it will be logged as an unknown device with the housecode. Note: the verbose level must be 3 or higher. KS300 devices do not have a proper code, so you can use anything.

The code used by ELV is in the "quaternal" (?) system plus one added to each digit, so you can even use the 4 button remote for programming. To convert, you have two choices: the program four2hex in the contrib directory, or the good old unix program bc.
• From quaternal (ELV Remote) to hex (fhem.pl):
  

  	 % bc
  	 obase=16
  	 ibase=4
  	 <elv number>

  where <elv number> is the number used on the remote, but 1 substracted from every digit (so each digit is between 0 and 3).
• From hex (fhem.pl) to quaternal (ELV Remote):
  

           % bc
  	 ibase=16
  	 obase=4
  	 <hex number>

  Now add 1 to each digit of the result, and prepend it with 1's if it has less than 4 digits.

The FHT80b's are talking to a single FHZ1XXX device, which has a unique "FHTcode". You have two choices: if you know the old FHTcode, then you can set it, or you can tell the FHT80b to forget the old FHZ, and start talking with the new one.
• Set the FHTcode: The problem with this method is that I don't know how to read out the value, we just can change it with
  set FHZ FHTcode <hex-code>
• Resync the FHT80b: Press PROG until "Sond" appears, then select "CEnt" with the wheel, press PROG again, Select "nA" with the wheel, press PROG again.

The manual talks about 0.3l resolution, but I wanted to calibrate my device. So I filled a plastic bottle with 0.5 liter water from the measuring cup, drilled a small hole in the bottom of the bottle, let the water flow slowly in the KS300 rain-cup, and looked at the counter after the bottle was empty.
The raincounter was incremented by 130 ticks. The diameter of my KS300 rain-cup is 13.9 cm, the area ca 151.75 cm², which is ca 1/65.9 m². The 0.5 liter corresponds to 32.95 liter per m². 130 ticks correspond to 32.95 l/m2 -> 1 tick is ca 253 ml. I estimate the error margin to +/- 2%
You are welcome to do your own experiments, I am interested in the results.

I think the command is complex and flexible enough. Use a perl expression for this functionality like (described in the commandref.html):

at *07:00:00 { fhz "set lamp on" if($we) }

The FS20STR is an FS20 device, even if it looks like an FHT80b. You'll get "only" on-for-timer and off-fot-timer events sent.

Convert the first 2 digits first from decimal to hex, then the next two. Example:


         % bc
	 set obase=16
	 <first two digits>
	 <last two digits>

E.g The FHT8b code 1121 is 0b15 for the fhem.pl

First you (most probably) have to install the DateTime::Event::Sunrise perl module, as it is not part of the standard distributions. If it is not installed and you copy the contrib/99_SUNRISE.pm into your module (FHEM) directory, then the program will not start up, telling you that this module is missing. The (IMHO) easiest way to install it is via the following command (probably as root):


   perl -MCPAN -e shell
   cpan> install DateTime::Event::Sunrise

This will fetch the module from a CPAN archive, compile it and install it, and will do the same with each perl module which is needed by this one.
Next look for the geographic coordinates of your home, e.g with a GPS receiver or with googleearth. Compute the latitude/longitude as needed, and enter them in your init file (fhem.cfg) with the command:

{sunrise_coord("", "", "Europe/Berlin") }

If you are living in a different timezone, then change the string above according to the perldoc DateTime manpage.
Now copy the contrib/99_SUNRISE.pm file into your module directory, and restart the program. If everything is ok, typing

{ sunrise_abs() }

in the telnet prompt, will return the time of the sunrise today, in a HH:MM:SS format.