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Tips (very important):
TXD: Send side, generally expressed as their own sender, normal communication must be connected to another device RXD.
RXD: the receiver, generally designated himself on the receiving end, normal communication TXD must be connected to another device.
When normal communication itself TXD RXD always connected device!
Since the resumption of spontaneous: RXD when normal communication TXD connected to other devices, so if you want to receive data sent by itself as the name suggests, is to receive the data they transmit their own, that is directly connected to its own TXD RXD, used to send and receive test itself It is normal, is the quickest and easiest way to test when there is a problem to do the first test to determine whether a product failure. Also known as the loopback test.
TTL level: typically binary data representation, + 5V equivalent to a predetermined logical "1", 0V is equivalent to logic "0", referred to as a TTL signal system, is positive logic
RS232 level: the use of -12V to -3V, equivalent to a logical "0", + 3V to + 12V logic level, equivalent to a logical "1" is negative logic
1, the main chip CP2102, generate a virtual serial port after installing the driver
2, USB to take power, leads to the interface includes 3.3V (<40mA), 5V, GND, TX, RX, pin signal level is 3.3V, positive logic
3, on-board status indicators, the transceiver lights, right after installing the driver status indicator lit, send and receive indicator flashes when the communication baud rate, the higher the lower the brightness
4, support the baud rate between 300bps ~ 1Mbps
5, the communication format support: 1) data bits 5,6,7,8; 2) support 1.5, 2 stop bits; 3) odd, even, mark, space, none parity
6, support the operating system: WIN7 / WIN8 / vista / xp / server 2003/200, Mac OS-X / OS-9, Linux
7, USB head is male, can be connected directly to the computer USB port
8, SMD components for the SMT production process, quality and stability
9, does not have USB head volume: (mm)
Buy this product includes the following accessories:
1, a welding test good module
2,20cm long 4P Dupont line
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