Data Sheet

RS232/485 TO ETH User Manual
5/22/19 www.waveshare.com/wiki 13 / 21
2.3. SERIAL PORT
2.3.1. SERIAL PORT BASIC PARAMETERS
Parameters
Range
Baud Rate
600~230.4Kbps
Data Bits
5, 6, 7, 8
Stop Bits
1, 2
Parity Bits
None, Odd, Even, Mark, Space
2.3.2. VCOM APPLICATION
Figure 11 Serial port basic parameters
User can download VCOM software from: Figure 14 VCOM application
https://www.waveshare.com/wiki/RS232/485_TO_ETH_Software.
Through this software user can set up connection between RS232/485 TO ETH and virtual
serial to solve the problem that traditional equipment PC software used in serial port
communication way.
2.3.3. FLOW CONTROL
RS232/485 TO ETH supports hardware flow control way ( RTS/CTS, only take effect in RS232
mode ) and software flow control way Xon/Xoff.
2.3.4. SERIAL PACKAGE METHODS
For network speed is faster than serial. Module will put serial data in buffer before sending
it to network. The data will be sent to network side as data package. There are 2 ways to end the
package and send package to network side - Time Trigger Mode and Length Trigger Mode.
⚫ RS232/485 TO ETH serial package time: Default is 4 bytes sending time, range from 0 to 255.
⚫ RS232/485 TO ETH serial package length: Default is 1460 bytes, range from 0 to 1460.
2.3.5. BAUD RATE SYNCHRONIZATION
When module works with USR devices or software, serial parameters will change
dynamically according to network protocol. User can modify serial parameters by sending data
conformed to specific protocol via network. It is temporary, after restarting DTU, the
parameters will back to original parameters.