<p>This is a high-speed USB bus adapter module that realizes the function of USB to 8 TTL serial ports. It is used to expand the asynchronous serial port for the computer, or directly upgrade serial port device or MCU to the USB bus.</p> <p>Built-in firmware, emulates the standard serial port, used to upgrade the serial port peripherals, or add additional serial ports through USB.</p> <p>The serial port application under the on the computer is fully compatible without modification.</p> <p>Supports , Linux, Android, macos and other operating systems.</p> <p>Hardware full-duplex serial port, built-in transmit and receive buffer, communication baud rate supports 1200bps-6Mbps.</p> <p>The serial port supports 8 data bits, odd parity, even parity and no parity, and supports 1 or 2 stop bits.</p> <p>Each serial port has a built-in 2048-byte receive FIF0 and a 1024-byte transmit .</p> <p>Supports half-duplex, provides 4 TNOWs to indicate the serial port is sending status, which can be used to control RS485 transceiver switch.</p> <p>Supports RS232, RS485, RS422 and other interfaces through external level conversion devices.</p> <p>Indicator light:</p> <p>Red light: Connect USB, 3.3V power indicator light.</p> <p>Emerald green light: The computer driver has been successfully installed, and the emerald green light is on.</p> <p>Normal: It can be used only when both indicators are on.</p> <p>Colour:Black</p> <p>Material:PCB+Plastic</p> <p>Package Contents:</p> <p>1 x USB to TTL Serial Port Module</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>