This is how you make your own home automation gateway

You may have some wireless devices at home such as temperature sensors, door contact sensors, sockets or a smart scale. By installing OpenMQTTGateway on a microcontroller board with the right hardware, you can connect all these devices to your home automation system. This is possible with Bluetooth low-energy and 433MHz radio as well as infrared light, LoRa or GSM/GPRS.