Hi, I just installed HA on my raspberry for the moment pilot air conditioning and roomba via broadlink rm pro plus have enabled temperature reading and audio chromecast. I would like to pilot some home accessories (equipped with rolling code remote controls) using relays connected to gps and remote controls. I read here: https://home-assistant.io/components/switch.rpi_gpio/ and it seems feasible, only to me that would serve a command that takes 1 second. I hope I explained to you 
sorry my bad english