I started creating my Smart Home with openhab and mysensors.com - Arduino Nodes. But now I updated the whole setup to ESP8266 powered Wifi-Node, which communicate via MQTT with an mosquitto-Server on an openhab runtime. Stay tuned for the developement.
terraRGB is a simple source code, which will run on your ESP-Nodes and will provide a easy to setup solution, to get your in and outputs running with openhab via MQTT.
In Button Topics there will be published numbers of clicks or a continuous holdingdown of min. 1,5s as "-1" value. Holding a button for 15s will reset the config and boot in config mode.
There are several hardware components based on ESP8266 on the market, which can easy be flashed with this or your own firmware.