The itouch gateway is required to be installed when connecting more than 35 itouch panels in 1 installation, or to access the itouch home automation system via a mobile application on a smart device.
The maximum number of panels linked is 125, with up to 4 gateways in any one installation.
The raspberry Pi unit connects to your local wifi modem via a LAN cable It operates by linking the itouch panels in the network via a Wifi connection. As long as your smart device is connected to your local wifi network in the home you will have access to operate the itouch system.
When the local wifi connection to your smart device is lost your smart device will operate via 4g through an MQTT broker to access the itouch system.
This method of priority of operation guarantees the faster response time with undiscernible delays in switching when connected locally ensuring that commands are not “lost” during transmission.