9 Replies Latest reply on Sep 27, 2016 1:25 PM by Intel Corporation

    Can't find /dev/ttyUSB when an RS485 converter is connected

    Aqour

      The chips in the converter is MAX485 and CH340G.

      I connected the RS485 devices as the following picture.

      P60909-135750(1).jpg

      The result of lsusb

      root@edison_aria:~#lsusb
      Bus 001 Device 005: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter       //These two are the converters I plug in.
      Bus 001 Device 003: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
      Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
      Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
      Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
      

       

      But when ls /dev/tty* ,I failed to find /dev/ttyUSB0 and /dev/ttyUSB1 .

      QQ截图20160909142016.png

      If I try it on Ubuntu, there is no such problem. Can anyone tells me what happened.

       

      Thanks a lot.