Sending a channel to broadlink

send_command.sh

#!/bin/bash 
channel="$1"
echo -n "Sending: " 
cd /opt/rm3/mag_iptv
if mkdir /var/lock/rm3; then
        for (( i=0; i<${#channel}; i++ )); do
          letter=${channel:$i:1}
          broadlink_cli --device @cogeco.device --send @$letter.iptv
          echo -n $letter
          sleep 0.5
        done
        broadlink_cli --device @cogeco.device --send @ok.iptv
        echo "-ok"
        # Throttle stuff
        sleep 5;
        rmdir /var/lock/rm3
else
  echo "Lock failed - exit" >&2
  exit 1
fi