说明：  本文介绍了水温测控系统的工作原理、设计电路和调试过程，给出了硬件部分的详细说明，包括原理和电路图，以及单片机软件部分的算法、流程。
(This article describes the working principle of temperature measurement and control system, circuit design and debugging process, gives a detailed description of the hardware components, including the principles and schematic, as well as part of SCM software, algorithms, processes.)