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KAKU A new protocol supported by OpenMQTTGateway

The first gateway done with OpenMQTTGateway was the RF one based on RCSwitch (all began with that :-)). 
This library is quite robust and support some basic protocols, unfortunately its development is not so active.
You could ask me to add protocols directly to the RCSwitch library, but without going this way I was looking for protocols adds with efficient solutions already built (time is a rare commodity).
By googling and discussing on the forums I found the NewRemoteSwitch library from Fuzzylogic
This library enables to control among others KlikAanKlikUit devices with an Arduino. I tried to port to ESP8266 and with some lite modifications it worked! With the help of @DenDeze who did some tests on the library modification, KAKU is now integrated to the gateway since V0.4-beta release.

The KAKU Protocol is used for instance by DIO chacon devices. Example below :



For this gateway named RF2 I use the same hardware receiver and transmitter as RCSwitch gateway with also the same pinout. 

Sending signal was tested and works well. You will find how to use this gateway on the wiki.

Receiving is now also implemented with the help of @zerinrc and @larsenglund

Now we can increase again the number of devices compatibles with OpenMQTTGateway!

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