Get DMRIDs Via Command Line

This is a quick workaround to retrieve a DMRID on console or terminal. This comes in handy when you don’t have a browser window open or not even a graphical setup running. The script uses w3m to retrieve website content from ham-digital.org. It’s also usable when piping its output to a file.

You want to install w3m. It is a text browser. Don’t forget rpi-rw before installing anything if you’re on Pi-Star.

sudo apt-get -y install w3m

The script

The script itself does not verify the given callsign, so whatever you write as an argument, it will be passed to the website. The script returns with 0 if nothing is found.

#!/bin/bash
# Get DMR-IDs from CALLSIGN or CALLSIGN from DMR-ID or vice versa
# Author: Dominic Reich, OE7DRT
# File:   ~/bin/call
#
# Last modified: 2020-04-12 13:26:36+0200
#
# Inspired from this beautiful article:
#   https://pretzelhands.com/posts/command-line-flags
#
# Good DX and vy 73 de OE7DRT

command -v w3m > /dev/null 2>&1 || { echo >&2 "w3m not found"; exit 1; }

print_usage () {
  echo >&2 "usage: `basename $0` [dmr_id | callsign]"
  exit 1
}

if [ $# -ne 1 ]
then
  print_usage
fi

getID () {
  CALL=`echo $1 | tr a-z A-Z`
  FILE=/tmp/$CALL
  w3m "https://ham-digital.org/dmr-userreg.php?callsign=$CALL" > $FILE
  c=`grep $CALL $FILE | wc -l | xargs`

  while [ $c -gt 0 ]
  do
    OUT=`grep $CALL $FILE | head -n $c | tail -n 1 | awk '{ print $4,$5,$2,$3 }'`
    echo "$OUT"
    ((c--))
  done
  rm $FILE
}

getCALLSIGN () {
  ID=$1
  FILE=/tmp/$ID
  w3m "https://ham-digital.org/dmr-userreg.php?usrid=$ID" > $FILE
  CALL=`grep $ID $FILE | awk '{ print $4 }'`
  rm $FILE
  if [ -z $CALL ]
  then
    exit 1
  fi
  getID $CALL
}

checkID () {
  if [[ ! $1 =~ ^[0-9]{7}$ ]]
  then
    echo >&2 "no valid dmr_id supplied"
    exit 1
  fi
}

if [ "$1" -eq "$1" ] 2>/dev/null
then
  ID="$1"
  checkID $ID
else
  CALL="$1"
fi

if [ ! -z $ID ]
then
  getCALLSIGN $ID
  exit 0
elif [ ! -z $CALL ]
then
  getID $CALL
  exit 0
else
  print_usage
fi

If someone has two DMRIDS, the most recent registered callsign will appear on the top. Feel free to modify the script to your needs if you also want to display the date of registration. Or modify the url if you want to only display last heard ids.

Example usage

Simply get one DMRID (or two, depends on the callsign though):

call OE7DRT

Now let’s think a bit more complex. You can use the script in a loop. Let’s fetch some austrian callsigns only.

for i in 7one 7two 1three; do call oe$i ids >>! ids; done

That would fetch 3 callsigns OE7ONE, OE7TWO and OE1ONE and write them all into the file ids. So run cat ids and display them on screen. Or copy them into clipboard (on a mac only) with pbcopy < ids.

OE7ONE Username1 0007001 2018-05-12
OE7TWO Username2 0007003 2018-12-08
OE7TWO Username2 0007002 2018-11-09
OE1ONE Username3 0001001 2020-03-13

I’ve been anonymizing the data a bit.

Partially known callsign

I anonymized some DMR-IDs on this website.

So you know only the three last letters of an austrian callsign and want to know quickly what federal state it was? Run this command and you’ll get a quick answer on the command line:

for i in oe{1..9}drt; do call $i; done
OE7DRT Dominic 2327180 2019-11-24

If you called your script call and if call is in your $PATH.

This works also if you missed one letter.

for i in oe7{a..z}rt; do call $i; done
OE7BRT Rainer 2327XXX 20XX-XX-XX
OE7DRT Dominic 2327180 2019-11-24
OE7JRT Josef 2327XXX 20XX-XX-XX

This took ~10 seconds on my computer.

Or even with more letters, but this will take a while, since this will start 676 (26 x 26) website lookups to ham-digital.org – maybe they’ll block your IP address quickly, if you hammer their server with so many request in a short period of time.

for i in oe7d{a..z}{a..z}; do call $i; done
2327XXX OE7D?? Daniel
2327XXX OE7D?? Hermann
2327XXX OE7D?? Josef
2327XXX OE7D?? Dragan
2327XXX OE7D?? Peter
2327180 OE7D?? Dominic
2327XXX OE7D?? Wechselberger
2327XXX OE7D?? Gernot

And this ran for 3 minutes and 17 seconds on my computer.

The output above was made with an older version of the script. The output now contains also the registration date as seen in previous examples.