The former is built upon SBCX[[:Category:SBC-AXEL|SBC-AXEL]] off-the-shelf board. It runs Android 6 (Marshmellow) and implements the high-level business logic besides the capacitive touch-screen based Man-Machine Interface (MMI). The latter integrates a bunch of application-specific I/O interfaces. The two boards are connected with an RS485 link on which data are exchanged through a proprietary protocol.

With regard to the gateway, it acts as a traffic sniffer on the legacy machine side. It is connected to the RS485 link and it "eavesdrops" all the traffic flowing through this channel. As it is aware of the protocol used, it can extract extracts each data from the packets exchangedand uploads it to the cloud.