How do I reset my Opal?

For a bit of context, the behavior of an Opal is determined by its configuration, which is saved as a file named config.ini on each Opal. These configuration values are set by our software during configuration (or by hand by the adventurous user).

Despite its size, the Opal is a very complex electronic device that has more computing power and peripherals than a desktop PC from 15 years ago. On occasion, it may get into a bad state, which will be indicated by a red flashing LED (see this support document for more information on these indicators). Below we document the various types of reset operations, what they do, and how to perform them. 

  • Dock/Undock: When you dock and undock an Opal (either in a docking station or a powered USB cable), it will re-read the configuration file, reset the individual sensors (accelerometer, etc.) and reset the radio. This will clear certain types of errors indicated by a red flashing LED, and is the first thing you should try as it is fast and easy.
  • Soft reset: A soft reset will shut down all of the Opal's systems and bring them back up again to conform to the saved configuration file. To perform this operation: 1) Hold button #2 (the one near the bottom of the display) for 3s until the boot menu comes up, 2) Push button #1 three times to navigate to the "Boot Menu" option, 3) Push button #2 to select this option, 4) Push button #1 once to navigate to the "Reset" option, and 5) Push button #2 to select this option.
  • Power cycle: Power cycling your opal is identical to a soft reset, with the exception that it completely powers down until you power it on again. It is possible for the Opal to maintain some electric state in the internal capacitors, which typically dissipate over 5-10s. Try this option if a soft reset does not address your issue. To perform this operation: 1) Hold button #2 (the one near the bottom of the display) for 3s until the boot menu comes up, 2) Push button #1 twice to navigate to the "Boot Menu" option, 3) Push button #2 to select this option. At this point, the Opal will be powered off. Wait 10s and dock it or plug it back into a USB cable to turn it on again.
  • Reset Configuration: This process resets the configuration file to the defaults, and reconfigures the Opal based on these defaults. It does not shut down your Opals systems and bring them back up again. To perform this operation: 1) Hold button #2 (the one near the bottom of the display) for 3s until the boot menu comes up, 2) Push button #1 three times to navigate to the "Boot Menu" option, 3) Push button #2 to select this option, 4) Push button #1 twice to navigate to the "Reset Configuration" option, and 5) Push button #2 to select this option.
  • Format SD: This process erases and reformats the internal storage on the Opal. This includes the configuration file (as the option above does) in addition to all logged data. To perform this operation: 1) Hold button #2 (the one near the bottom of the display) for 3s until the boot menu comes up, 2) Push button #1 three times to navigate to the "Boot Menu" option, 3) Push button #2 to select this option, 4) Push button #1 three times to navigate to the "Format SD" option, and 5) Push button #2 to select this option.
  • Hard Reset: A hard reset is identical to a soft reset, but can usually be performed if the Opal is otherwise unresponsive. To perform this operation: 1) Plug the Opal into a powered USB cable (either connected to your computer or a wall charger), 2) Hold both buttons for 30s until you see the LED come on and the Opal reset.
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