find_elecraft_k4_usb_devices.sh

#!/bin/bash
# vim: ft=sh sw=4 ts=4 et

# Overview
# --------
# This script queries connected USB devices looking for the Elecraft K4's "Dual RS232" device.
# If such a device is found and the serial devices exist, they are listed as K4 candidates. If
# no devices are found, an error is printed.
#
# Instructions
# ------------
# 1. Download this file to your Mac (put it in the Downloads folder)
# 2. Open Terminal.app
# 3. sh $HOME/Downloads/find_elecraft_usb_devices.sh

BASE_ADDR=`ioreg -p IOUSB | grep 'Dual RS232' | sed -e 's/.*Dual RS232@//' | awk '{print $1}'`

found=0
for device_id in $BASE_ADDR $(expr $BASE_ADDR + 1)
do
    candidate="/dev/cu.usbserial-$device_id"
    if [ -e $candidate ]; then
        echo "Potential K4 USB device: $candidate"
        let found=$found+1
    fi
done

if [ "$found" -eq 0 ]; then
    echo "ERROR: Unable to find any potential K4 USB devices. Is the K4 connected?"
    exit 1
else
    exit 0
fi