Installation instructions for both Fibaro modules I’ve tested are excellent, providing all the necessary wiring diagrams, precautions, operational and configuration information. The modules easily install behind a switch, with my wall box being 68mm in diameter and 40mm deep. A bit harder was to install it in a wall box behind 2 switches, with lots of wires, but due to the small size of the modules, it is possible.

Since I have a 2-wire electrical system, seen in the picture above, bringing a neutral wire to every switch location was not an option (A neutral wire is for instance required for Düwi light switch). Here comes the Fibaro module handy, due to the fact it does not require a neutral wire. I first connected a mono-stable switch to the module, added the module to Vera network, and in 5 minutes was already controlling a simple 60W incandescent light through Vera.

Bulb on off

In the first picture is 100% light intensity, where in the second it is reduced to only 10%. Pressing the mono-stable switch turns the light off, and pressing it again turns it on to the previous intensity level. Double clicking sets the level back to maximum. Press and hold reduces the intensity level (approx. 2 seconds for going from maximum to minimum level). Additional parameters (like level boundaries, time  for  moving  from  maximum  to  minimum  level,  etc.)  may  be  configured  through  Vera,  using Device  properties  and  sending  1byte  dec  commands  to  the  Fibaro  unit.  All  parameter  values  are clearly explained in the instructions provided. Very well done Fibaro, almost justifies the 60€ price tag.

However, connecting my usual  bi-stable switch to the  module showed some issues. First of all, if you do not  want to do a quick on-off click on the switch to turn the  light  on,  then  you  need  set  parameter  14  value  to  1  (through  Vera).  I  learned  it  the  harder  way.  A  downside of a bi-stable switch is that one may only turn the  lights  on  and  off  (on  to  a  previously  set  intensity level).  There  is  no  option  of  manually  setting  the intensity  level.  A  quick  on-off-on  still  sets  the  level  to maximum.  Afterwards  I  connected  a  20W  CFL  light  bulb.  The  bulb  is not  dimmable,  so  I  was  not  planning  on  using  the  Fibaro module  to  dim  the  light,  only  to  turn  it  on  and  off.

Bulb OnHowever,  when  the  light  is  turned  off,  the  light  bulb  is flickering  at  a  very  low  light  level.  In  daylight  it  is  barely noticeable, but during the night it is not acceptable. In the picture  may  be  seen  how  it  looks  at  switch  position  OFF. Fibaro  recommends  using  a  bypass  module  (connected  in parallel to the lamp), but some users reported that certain light bulbs don’t function well at maximum intensity with this bypass accessory (flickering). I will have to contact Fibaro about that.


About the Author

José Miguel Rubio Varas
Cofounder of Domótica Dainci. Since childhood I wanted to become telecommunications engineer. I got tired of being Engineer Power Point and I decided to undertake. I found my passion in Automation. That automation that is not already expensive or a source of problems, but it is for everyone.