The other possibility is to use a dedicated RF transceiver
based on a proprietary communication protocol (Fig. 2). The
best scheme is to use a high carrier frequency (2.4 GHz free
band) to achieve 1 to 2 Mbps data rate. Nordic nRF protocol
offers even more [9]. It allows multiple RF canals and is
address selectable to allow multiple identical hardware
devices communicate in a swarm structure. It also allows
large payload (relevant) data and 16 bits CRC checksum
integrity.