Abstract
This paper introduces a kind of wireless monitoring system controlled by computer, which is used to control the grain condition, and prevent the grain from rotting.
The system adopts wireless network and multi-CPU technique. The wireless communication can avoid the shortcoming of remote wire transmission, such as large wastage, high cost etc. Each node is made up of two MCU. The main MCU (89C51) takes charge of measurement,control and communication with the communication MCU. The communication MCU (89C2051) is used to control receiving and sending data in the wireless communication. Many sensors are connected to one bus as intelligent terminals. The mode controller gathers all buses. Each node controller is responsible for a granary. A complete communication protocol is defined in the wireless network communication.
The paper completes both the software and hardware design. At the same time, it puts forward a kind of temperature monitoring system that can be applied to the medium and small-scale granary.
Keywords MCU Wireless transmission Coding Sensor