USB to TTL module: compatible with STC 3.3V and 5V UART interface
Size: 47*14mm; DuPont line length: 200mm
Interfaces include: 3.3V (less than 40mA) 5V GND TX RX
Pin level: 3.3V
Baud rate: supports 300bps-1Mbps
Product includes: 3 CP2102 modules; 10 male and female DuPont lines; 10 female DuPont lines
Note (very important):
TXD: transmitter, generally represented as its own transmitter, normal communication must be connected to the RX of other devices.
RXD: receiving end, generally represented as its own receiving end, normal communication must be connected to the TXD of other devices
During normal communication, its own TXD is always connected to the RXD of this device
Self-receiving and self-transmitting: During normal communication, RXD is connected to the TXD of other devices
So, if you want to receive the data sent by yourself, as the name implies, you should receive the data sent by yourself, that is, connect your own TXD directly to RXD to test whether your own transmission and reception are normal.
This is a quick and easy test method. When a problem occurs, this test can be used to determine whether the product is faulty. It is also called a loopback test.
Level logic: TTL level: Usually data is represented in binary, +5V is equivalent to logic "1", 0V is equivalent to logic "0", called TTL signal system, which is positive logic
RS232 level: -12V to -3V is used, which is equivalent to logic "0", and +3V to +12V logic level is equivalent to logic "1", which is negative logic.
Product description:
1. The main chip is CP2102. After installing the driver, a virtual serial port will be generated.
2. USB power supply, lead interface includes 3.3V (<40mA), 5V, GND, TX, RX, signal pin level is 3.3V, positive logic
3. Onboard status indicator light, transceiver indicator light, the status indicator light is always on after the driver is correctly installed, the transceiver indicator light flashes during communication, the higher the baud rate, the lower the brightness
4. Support baud rate 300bps~1Mbps
5. Communication format support: 1) 5, 6, 7, 8 data bits; 2) support 1, 1.5, 2 stop bits; 3) odd check, even check, mark check, space check, no check
6. Compatible operating systems: Windows Vista/XP/Server 2003/2000, Mac OS-X/OS-9, Linux