The 4-digit digital tube display is different from the general segment code. The high and low bits are reversed. There are 4 LED lights, onboard CH340G (can be replaced by CH340C), one-click download, TYPE-C power supply. The right side can be connected to an external auxiliary power supply. The pin header on the right side can switch to 5V or an external power supply to drive heavy loads. There is an interface left for connecting to the DS18B20. Note that the external power supply interface connection is wrong, remember to change it. Simple sample code is given below.
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