Using the Renesas chip as the MCU uses serial communication to communicate with the inside and outside of the machine, and the serial port protocol URAT to interact with the external WIFI conversion module. Two sets of communication interfaces are scheduled. Since there is no suitable choice for the digital tube, a custom digital tube LED array is used for control. There are two 8's in total, which can display real-time water temperature, set water temperature, water flow and other parameters. The WIFI module is scheduled to use Tuya module custom product MCU solution TYJW2S-5V-BL, which is a module composed of ESP8266 and an external expansion FLASH module designed by Tuya; this module can be operated directly after powering on 5V Working, there is only one set of RXTX interfaces.
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