Domoticz

Beside my KaKu devices I have an older wireless LED dimmer which seems to work on the 433 MHz band. Using RFXmngr I figured out that the device is sending out codes which are currently not supported by the RFXcom firmware, but can be emulated using the lighting4 protocol. I used undec to figure our what it is sending, and comfirmed this works in RFXmngr:

An on/off is registered as (same button):
ARC: 284132010183
And can be emulated using the lighting4 with 4 1 3 2 0 1 (0100 0001 0011 0010 0000 0001) as output.

Increasing light registers as:
ARC:284132040579, and works with 4 1 3 2 0 4 in the lighting4.
Decreasing light is as follows:
ARC:284132020578, and again works with lighting 4 1 3 2 0 2

Interestingly the device has a sticker on it with device ID: 0399, which doesn't seem to relate to the above numbers. I opened the remote and it has a 433 MHz crystal and HS1527 (EV1527 compatible) encoder.

My question is, is it possible to make a manual dimmer in Domoticz which would send the same commands over the RFXcom? Or is there any other way to get this working from within Domoticz?

Perhaps not the most elegant solution, but I've solved it using RFXcmd and calling an external bash script. I can only turn the device on/off, but I typically do not adjust the light intensity once set, so that is fine.

Basically, RFXcmd can be used to fake a lighting4 command which is accepted by the device by using:
python rfxcmd.py -d /dev/ttyUSB0 -s 09130000413201015E70

Although the last four digits don't really matter at all (although 0000 seems to not always work odd enough). This is picked up by the device as an on/off command.

In the future, I will contact RFXcom to see if support for this device is worth adding (or even possible at all). These LED dimmers are sold by a lot of webshops as a cheap dimmer in Holland.