ch343ser_linux-main.zip

用的是这个代码。

编译正常。能正常识别到ttyCH343USB0.

[  163.815243] usb 2-1: new full-speed USB device number 2 using ohci-platform

[  164.042656] usb 2-1: New USB device found, idVendor=1a86, idProduct=55d3, bcdDevice= 4.45

[  164.042685] usb 2-1: New USB device strings: Mfr=0, Product=2, SerialNumber=3

[  164.042695] usb 2-1: Product: USB Single Serial

[  164.042703] usb 2-1: SerialNumber: 5719028097

[  164.044893] usb_ch343 2-1:1.0: ttyCH343USB0: usb to uart device

[  164.046660] usb_ch343 2-1:1.0: chip idproduct is 21971,chiptype is 8

[  164.048648] usb_ch343 2-1:1.0: chip type is 2

[  164.048830] usb_ch343 2-1:1.0: normal to probe

[root@RV1126_RV1109:/]# stty -F /dev/ttyCH343USB0 

[  181.176634] usb_ch343 2-1:1.0: chip type is 2

[  181.176665] usb_ch343 2-1:1.0: ch343_update_status - unknown status received:len:10, data0:0xa1, data1:0x20

speed 9600 baud; line = 0;

-brkint -imaxbel

[root@RV1126_RV1109:/]# 

[root@RV1126_RV1109:/]# printf "01" >/dev/ttyCH343USB0 

[root@RV1126_RV1109:/]# 

发数据的时候会出现多出2个数据。

这是什么原因导致的。而且每次第一次插上，只要直接通信，都会报ch343_update_status - unknown status received:len:10, data0:0xa1, data1:0x20这个。后续不会报。但是发数据就很奇怪

您好，看您发的是V1.6的老版本驱动，麻烦下载安装最新的CH343 Linux驱动，驱动链接：https://github.com/WCHSoftGroup/ch343ser_linux。 

下载了最新的驱动后，解决了发送数据出错的问题。在设备插上后，第一次对ttyCH343USB0进行操作(配置或者使用默认配置进行数据发送)的时候会报错。但是后续操作并没有受影响

ch343_update_status - unknown status received:len:10, data0:0xa1, data1:0x20

speed 9600 baud; line = 0;