Code required to get the Arduino Nano I have soldered to a bunch of other components to play nicely with the emergency beacon light it is meant to drive.
This is the sketch that is run on the Arduino. It won't do anything until you send it a message over the serial port.
The sketch to be run on the computer to trigger the emergency beacon. You'll need to execute it when you want to turn on the beacon. I originally had this called by a custom Outlook rule.