Msp430f1491 is a single-chip microcomputer produced by Texas Instruments (TI) Co., Ltd. the most remarkable feature of MSP430 series single-chip microcomputer is its ultra-low power consumption. Operate under the clock condition of 1.8-3.6v voltage and 1MHz. The power consumption current is between 0.1-400ma, RAM power consumption is 0.1mA in power saving mode and only 0.7ma in waiting mode. Energy consumption is the bottleneck of wireless sensor network, nodes must rely on battery power, so MSP430F149 CPU is the best choice. MSP430F149 adopts 16 bit RISC structure. Its rich addressing mode, simple kernel instructions, high processing speed (8m crystal drive, instruction cycle 125ns), a large number of registers and on-chip data memory make it have strong processing ability. In addition, MSP430F149 operates in an ambient temperature range of - 40 ° C to + 85 ° C, which can adapt to various harsh environments.