Table 4.

Communication frame format diagram.

(a)
Frame header		Year		Month		Day	Hour		Minute		Second
32 bit		16 bit		8 bit		8 bit	8 bit		8 bit		8 bit
Internal number		Room Number		Sampling channel		Samples per period	Sampling value		End of frame		CRC
8 bit		8 bit		8 bit		16 bit	16 bit		16 bit		32 bit
(b)
Frame header	Internal number		Room number		Sampling channel	Samples per period		operation		End of frame		CRC
32 bit	8 bit		8 bit		8 bit	16 bit		8 bit		16 bit		32 bit

(a) Data frame format of the data acquisition component and the data storage component (b) Retransmission frame and acknowledgement format of the data acquisition component and the data storage component.