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Description

TXD: Sending end, generally expressed as its own sending end. Normal communication must be connected to RXD of another device.

RXD: the receiving end, generally expressed as its own receiving end, must be connected to another device's TXD for normal communication.

During normal communication, its TXD is always connected to the RXD of the equipment!

Self-receiving and spontaneous: RXD is connected to TXD of other equipment during normal communication. Therefore, if you want to receive data sent by yourself, just as the name implies, that is, you receive data sent by yourself, that is, your TXD is directly connected to RXD to test whether your sending and receiving are normal. It is the fastest and simplest test method. When problems occur, you should first do this test to determine whether there is a product failure. Also called loopback test.

Level Logic

TTL level: usually the data representation adopts binary, which stipulates that +5V is equivalent to logic "1" and 0V is equivalent to logic "0". It is called TTL signal system and is positive logic

RS232 level: adopts -12V to -3V, which is equivalent to logic "0", +3V to +12V logic level, which is equivalent to logic "1", it is negative logic.

Product Description

1. The chip is CP2102, generating Virtual Serial Port after Installing Driver.

2. USB draws power, and the outgoing interface includes 3.3V(<40mA), 5V, GND, TX, RX, signal pin level is 3.3V, positive logic

3. On-board status indicator light and the transceiver indicator light will always be on after the drive is properly installed. The transceiver indicator light will flash when communicating. The higher the baud rate, the lower the brightness.

4. Support 300 bps - 1 Mbps baud rate

5. Communication format support: 1) 5,6,7,8bit data bits; 2) Supports 1,1.5,2 stop bits; 3) odd,even,mark,space,none check

6. Operating system support: Windows Vista/XP/Server 2003/200, Mac OS-X/OS-9, Linux

7. USB head is male and can be directly connected to USB port of computer