The Sting has a red and blue LED on the PCB, underneath the light pipe. This article gives some information on what the LED's indicate.


Red LED:

  • Charging: solid on.
  • Not charging: off.
  • Transition between charging and not charging: flash at 1Hz. This state occurs when the 5V input is not stable; or the battery goes out of its charging temperature range; or the charger is switching off because the battery is full.


Blue LED:

  • Initial power on: solid on for about 1 sec.
  • Recovery mode: 1 flash every 5 sec.
  • GPS Fix Attempt: 1 flash every 1 sec; only on first wake after being unplugged, or if "disable after sleep" parameter is set to false;
  • GPS Freshen: 1 flash every 2 sec; only on first wake after being unplugged, or if "disable after sleep" parameter is set to false;
  • Upload: 1 flash every 200 ms; only on first wake after being unplugged, or if "disable after sleep" parameter is set to false;
  • Tamper: if the "indicate tamper" parameter is set, then on for 100ms, then off.
  • Sleep with 5V power present: solid on
  • Sleep with no 5V power present: off.