The State-of-the-Art of Knowledge-Intensive Agriculture: A Review on Applied Sensing Systems and Data Analytics

Table 2

The state-of-the-art of the sensing platforms in agriculture (Ojha et al. [2]).

Feature	MICAZ	TelosB	IRIS	LOTUS	Imote2	SunSPOT
Processor	ATmega128	IMSP430	ATmega128	Cortex M3 LPC 17xx	Marvell/XScalePXA271	ARM 920T
Clock speed (MHz)	7.373	6.717	7.373	10–100	13–416	180
Bus width (bits)	8	16	8	32	32	32
System memory (kB)	4	10	4	64	256	512
Operating frequency band (MHz)	2400	2400	2400	2400	2400	2400
Transceiver chip	CC2420	CC2420	Atmel RF230	Atmel RF231	CC2420	802.15.4
Number of channels	Programmable	Programmable	Programmable	—	In steps of 5 MHz	—
Data rate (kbps)	250	250	250	250	250	250
I/O connectivity	UART, I2C, SPI, DIO	UART, I2C, SPI, DIO	UART, I2C, SPI, DIO	3xUART, SPI, I2C, I2S, GPIO, ADC	UART3x, SPI2x, I2C, I2S, GPIO, DIO, JTAG	DIO, I2C, GPIO