In the case of direct expansion (split) air conditioning systems, the PICnet system communicates directly with the external unit, typically via the MODBUS protocol, to allow integration. For those systems that do not have a control external communication unit suitable for centralized management, the system will instead be managed through communication with the internal units, through PICnet modules that have an infrared transmitter with high emission power. Thanks to a patented technology, the PICnet modules are in fact able to fully reproduce the commands available from the remote control, not just replicating predefined set points, thus guaranteeing full remote control of the unit, through centralized supervision. Throughout its history Sinthesi has developed PICnet integrations with the most popular brands and models of air conditioning systems, such as Daikin, Fujitsu, LG, Mitsubishi, GREE, Panasonic, Sharp, Toshiba and many others.