Design of Smart Classroom System Based on Internet of Things Technology and Smart Classroom

Table 1

Zigbee wireless network channel distribution.

Number of frequency bands	Channel frequency spacing	Transfer speed (kbps)	Modulation mode	Maximum frequency	Minimum frequency
1	0	20	B0SK	868.2 MHz	868 MHz
10	2	40	HPSK	928 MHz	902 MHz
16	5	250	QPSK	2483.5 MHz	2400 MHz