Situation

# 使用Minicom想連線到Cisco C3850但沒有TTYUSB0
Tried to connect to a C3850 using Minicom but TTYUSB0 is not available.

# Type A - Type B(Micro USB)
# PC - C3850

Solution

# MicroUSB(Type B)設備要用ttyACM0

[1-1]
# 確認USB裝置
lsusb > Cisco Systems, Inc. Console

[1-2]
# 確認USB裝置名稱
sudo dmesg | grep tty

# 也可從/dev底下判斷
cd /dev > ls tty*

[3]
# 設定Minicom，要用ttyACM
sudo minicom -s > Serial port setup > A > /dev/"Your_USB_Device" > Enter

# 設定Baud Rate為9600 or 115200
E - BPS/Par/Bits > 115200 8N1
E - BPS/Par/Bits > 9600 8N1

# 設定Flow Control
F - Hardware Flow Control > No
G - Software Flow Control > No

[4]
# 儲存為預設值
Save setup as dfl

Check

# 測試連線
sudo minicom > Enter

# 更改設定
CTRL+A > Z