title: Using perl to talk to serial port for sat comms
body: <p>This is probably an easy one, but I need to use perl to both talk to a serial port, and accept responses back from it - ideally something which would flag up to the rest of my programme that a new message has come back from the port so that I can process it?</p>
  
  <p>The unit I'm using is called a RockBLOCK, it's a two-way satellite communicator module, plugs into the USB port, but presents itself as a normal serial device. Details here in case anyone is interested: <a href="http://rockblock.rock7mobile.com" rel="nofollow">http://rockblock.rock7mobile.com</a></p>
  
  <p>Does anyone have any sample code for sending data plus also flagging if a message has come back? The first bit seems fairly straighforward, but the second less so...</p>