This module is USB to 485 & serial port. Use CH340E to convert USB to serial port and use MAX13488 to convert serial port to 485. It has simple functions and small size, making it suitable for personal use at work.
However, the layout of the mini is not very good, it is quite crowded, not easy to weld, and my hands are a bit handicapped. So I used solder paste and an air gun to solder.
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