Difference between revisions of "UIO-4031 RS485：U-COM0/1、U-COM2/3"
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| − | [[File:UIO-4031 U-COM01 23.png]] | + | [[File:UIO-4031 U-COM01 23.png|RTENOTITLE]] |
| − | [[File:UIO-4031 U-COM01 23-Pin.png]] | + | [[File:UIO-4031 U-COM01 23-Pin.png|RTENOTITLE]] |
| + | |||
| + | === '''Send and Receive Data''' === | ||
| + | |||
| + | The following figure shows the connection mode. | ||
| + | |||
| + | [[File:UIO-4031 RS485.png]] | ||
| + | |||
| + | '''Taking COM1 as receiver and COM2 as sender :''' | ||
| + | <pre># #---- COM1 as receiver ----# # | ||
| + | # stty -F /dev/ttyUSB0 115200 cs8 -cstopb -parenb -crtscts | ||
| + | # cat /dev/ttyUSB0 & | ||
| + | |||
| + | # #---- COM2 as sender ----# # | ||
| + | # stty -F /dev/ttyUSB1 115200 cs8 -cstopb -parenb -crtscts | ||
| + | # echo pass > /dev/ttyUSB1 | ||
| + | |||
| + | # #----If no error, the receiver will receive “pass”----# # | ||
| + | pass</pre> | ||
| + | |||
| + | [[File:UIO-4031 RS485 1.png]] | ||
| + | |||
| + | Note: | ||
| + | |||
| + | 1、Receiver should run before sender. | ||
| + | |||
| + | 2、The “serial port parameters” should be the same for sender and receiver. | ||
Latest revision as of 02:34, 20 December 2024
Send and Receive Data
The following figure shows the connection mode.
Taking COM1 as receiver and COM2 as sender :
# #---- COM1 as receiver ----# # # stty -F /dev/ttyUSB0 115200 cs8 -cstopb -parenb -crtscts # cat /dev/ttyUSB0 & # #---- COM2 as sender ----# # # stty -F /dev/ttyUSB1 115200 cs8 -cstopb -parenb -crtscts # echo pass > /dev/ttyUSB1 # #----If no error, the receiver will receive “pass”----# # pass
Note:
1、Receiver should run before sender.
2、The “serial port parameters” should be the same for sender and receiver.