Serial #
picocom Autocompletion
#
Here is a simple config I put in my .bashrc to enable useful defaults and
device autocompletion for picocom:
# picocom config for usb serial
if iscommand picocom; then
alias picocom='picocom --baud 115200 --omap crcrlf,delbs --quiet'
_picocom_serials() { COMPREPLY=($(compgen -W "$(ls /dev/{ttyUSB,serial/by-id/}* 2>/dev/null)" "${COMP_WORDS[1]}")); }
complete -F _picocom_serials picocom
fi
udev Rule to Create Symbolic Links for Devices
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As soon as you regularly have more than one USB serial adapter,
for example a Startech RS232 cable and a Sparkfun FTDI breakout board …,
the /dev/ttyUSB* naming gets frustrating. There’s symlinks in
/dev/serial/by-id/* which are stable. But do you really want to remember the
serial yourself?
A page in the siduction wiki
describes how you can create symlinks with udev rules.
Find your device’s attributes with udevadm info --attribute-walk --name=/dev/ttyUSB*.
For example my Startech RS232 adapter lists:
/* ... */
looking at device '[...]/ttyUSB0/tty/ttyUSB0':
KERNEL=="ttyUSB0"
SUBSYSTEM=="tty"
DRIVER==""
/* ... */
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3.3':
KERNELS=="1-3.3"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
/* ... */
ATTRS{idProduct}=="6001"
ATTRS{idVendor}=="0403"
/* ... */
ATTRS{manufacturer}=="FTDI"
ATTRS{product}=="FT232R USB UART"
ATTRS{serial}=="AI05A7NY"
/* ... */
/* ... */
Create a file in /etc/udev/rules.d/ named like 20-serial-mydev.rules with
the following content to create a custom symlink whenever the matching device
is attached:
# create an alias for the startech rs232 serial cable
SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="AI05A7NY", SYMLINK+="ttyUSBStartechRS232"
Use picocom with the new alias:
picocom /dev/ttyUSBStartechRS232