基于RT-thread嵌入式操作系统的框架，以GP21为核心的热量表系统开发代码，包括热量传感器计算、应用程序调度、EPD显示程序和存储程序共5部分-Based on the RT-thread embedded operating system framework, GP21 as the core of the heat meter system development code, including heat sensor calculation, application scheduli