#!/bin/sh
#(c) Bernhard Tittelbach

if [ -z "$1" ]; then
  IDS="03eb:204b"
else
  IDS=$1
fi

WAIT_MAX=20

FOUND=0
DISAPPEARED=0
echo -n "Please double-tap GND to the RST pin"
i=$WAIT_MAX
while (test $i -gt 0); do
  echo -n "."
  for id in $IDS; do
    lsusb -d $id > /dev/null 2>&1
    if [ $? -eq 0 ]; then
      FOUND=1
      [[ $DISAPPEARED -eq 1 ]] && break;
    else
      [[ $FOUND -eq 1 ]] && DISAPPEARED=1;
    fi
  done
  if [ $FOUND -eq 1 -a $DISAPPEARED -eq 1 ]; then
    break;
  fi
  sleep 0.1
  i=$(($i-1))
done

if [ $FOUND -eq 1 ]; then
  echo " device found!"
  sleep 1
else
  echo " timout - trying anyway"
fi

exit 0