EVO ONX RS232 Usage

RS232 Usage

RS232 Pin Definition

Pin	Signal
5	RS232_1  TX
6	RS232_1  RX
7	GND
8	RS232_2  TX
9	RS232_2  RX
10	GND
16	GND
17	RS232_3  TX
18	RS232_3  RX

Function and Device Node

Function	Device Node
RS232_1	ttyUART_232_1
RS232_2	ttyUART_232_2
RS232_3	ttyUART_232_3

Usage

Preparation

PC（Ubuntu System）

#Install
sudo apt-get install putty -y

Device

#install
sudo apt-get install putty -y

Receive-Send Test

Device

#Open putty
sudo putty

After opening Putty, configure the parameters in “Session”. Enter the device node in “Serial line” and set the speed to 115200 in “Speed”. Choose “Serial” in “Connection type”.

Configure the parameters in “Terminal”, select “Force on” in “Line discipline options”, and then click “Open” to enter the data transfer interface.

PC

Obtaining the UART device node on the PC side.

#After connecting the USB to serial module to the PC side, execute the command, and the output result is the UART device node.
 ls /dev | grep -E 'ttyUSB[0-9]+' | sort -V | tail -n 1

#Open putty
sudo putty

After opening Putty, configure the parameters in “Session”. Enter the device node in “Serial line” and set the speed to 115200 in “Speed”. Choose “Serial” in “Connection type”.

Configure the parameters in “Terminal”, select “Force on” in “Line discipline options”, and then click “Open” to enter the data transfer interface.

Use PuTTY to determine whether the send and receive operations are successful.

Observe the transmission interfaces on both the device side and the PC side. Enter any information in either interface, and if both interfaces display the same content, it means that the send and receive operations are successful.

PC

Device