Button

<codebender>124145</codebender>

• http://chaeplin.github.io/project-01-button.html
• http://adityatannu.com/blog/post/2016/01/01/WeatherBug-ESP8266-WeatherStation-with-IFTTT-and-HomeKit-support.html
• https://www.rustynailed.net/2014/12/17/voice-controlled-lights-using-raspberry-pi-nodered-and-tasker/