R305 fingerprint module has RS232 and USB2.0 at the same time. USB2.0 interface can connect to the computer. RS232 interface is TTL level and the default baud rate is 57600, which can be changed. Please refer to the communication protocol. It can be connected with microcontroller, such as ARM, DSP and other equipment with serial port, and the microcontroller of 3.3v and 5V can be connected directly. When connecting to the computer, please pay attention to the level conversion, such as the MAX232 circuit.
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