Agricultural Internet of Things sensor communication method based on wireless network and Raspberry Pi nodes

Abstract

The invention belongs to the technical field of agricultural Internet of Things equipment and information processing, and discloses an agricultural Internet of Things sensor communication method basedon a wireless network and Raspberry Pi nodes, which adopts a Raspberry Pi development platform as an acquisition node and is responsible for acquiring data of each USB interface and summarizing the data; a ZigBee protocol stack and a wireless chip are analyzed, a terminal node of a wireless sensor system is built, and a coordinator based on a USB interface is built; and the coordinator enables the UART mode to communicate with an upper computer. The wireless sensor system designed by the invention is convenient to use, and the system-on-chip of the raspberry pi platform can perform secondaryprocessing on sensor data, so that a foundation can be laid for further performing intelligent processing on sensor nodes; the wireless network protocol needs to have the characteristics of low powerconsumption, low cost, capability of supporting a large number of network nodes, safety and the like, and the two nodes can stably communicate in a short distance.

Description

technical field [0001] The invention belongs to the technical field of agricultural Internet of Things equipment and information processing, and in particular relates to a communication method for agricultural Internet of Things sensors based on a wireless network and a raspberry pie node, in particular to an agricultural IoT sensor communication method based on a ZigBee wireless network and a raspberry pie as a node. Networked sensor system and communication method. Background technique [0002] Currently, the closest prior art: [0003] Agriculture is China's basic industry. The Chinese government has always attached great importance to agricultural development, but urbanization and soil desertification have reduced the arable land area year by year. In the case that the area of ​​arable land cannot be increased, it is particularly important to increase crop yields through modern technology. [0004] However, according to many years of surveys, due to reasons such as rap...

AI Technical Summary

Problems solved by technology

Sensors on different platforms are not compatible, which greatly increases the difficulty and cost of agricultural informatization

[0012] (2) In the prior art, since the direct use of the integrated analog-to-digital converter ADC in the system on chip will occupy a large amount of resources of the CPU

Too much data will lead to high transmission delay, and even dirty data, etc.

[0013] (3) There is no unified specification for sensor manufacturers, and the interfaces of sensors produced by different manufacturers are different

The processors of the simple system-on-chip are mostly streamlined microprocessors, such as the JN5121 module uses a 16Mz, 32-bit RISC microprocessor; the CC2530 uses an 8K enhanced 8051 core; the maximum processing frequency of the stm32 processor is 183Mz, and the resources of the above processor relatively backward

[0015] (5) The system has few expandable functions. Although it has low power consumption and is easy to implement, it can only collect and transmit sensor data simply.

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