Design Of Remote Communication System Based On Beidou Short-message And RT-thread

Satellite communication is an effective way to solve the problem of communication in the area without mobile communication base station.At present,Beidou short-message equipment on the market is highly specialized and expensive,which results in less choices for users.This paper designs a long-distance communication system based on Beidou short message and RT thread,which is connected with embedded system through computer or mobile phone as operation platform.It has the functions of location,expandable data acquisition and short message communication.It can be used in both fixed location and mobile terminal.Two sets of equipment can communicate with each other,which can effectively reduce the cost of purchasing equipment.The embedded hardware circuit designed in this paper is composed of power supply circuit,embedded processor,Beidou short-message circuit,serial circuit,positioning module,etc.,and more peripheral pins are reserved.Due to the need to work in the wild,adding solar charging devices to ensure battery life.The Beidou short-message module of the system adopts RD0538 D,the main control chip of the system adopts the STM32F103ZET6 embedded processor based on M3 core,and the RT-Thread embedded operating system is transplanted to realize multi-threaded operation.Env tools can also be implemented later through the operating system.Function expansion.The user connects the embedded device Bluetooth through the smart phone software,or connects to the serial port of the embedded device through the PC software to send instructions or display and receive.The user controls the embedded device to perform positioning data,acquires data acquisition,and sends short-messages by sending device-specific instructions.The mobile phone software adopts the web-based Ionic cross-platform development technology,which can be used on platforms such as i OS and Android.The upper computer of the computer is developed using Qt,which includes functions such as serial port transmission and reception,server transmission and reception,map display,and data polyline display.It has stronger human-computer interaction ability.In the system test,the mobile terminal device is used to simulate the wild environment.The mobile terminal connects the device with the test peripherals through the mobile phone without the SIM card,and sends the test data to the fixed terminal device connected to the computer through a short message to complete the remote communication test.In addition,the tested data length,positioning accuracy,and expected standby time have been tested,and the device has certain application prospects.