PurePower firmware update history:

Please follow the installation procedure from the online PurePower user manual.

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NOTE:  Firmware 1.8 or above is required for proper operation with the PurePower option.
NOTE: PurePower firmware can only be upgraded on a Windows PC.  If you are an OSX user, please use a Windows PC for this upgrade.
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December 5 2014: 1.15

- We strongly recommend this update because it will improve the sound.
- Screen always turns off while playing music (lower noise = better sound).
- Properly power down USB hardware (lower noise = better sound)
- Fixed possible battery drainage issues
- Raised minimum battery voltage before entering deep sleep
- Boot loader 1.14 automatically restarts after ~60 minutes to prevent battery drainage.

January 5 2013: 1.13

- Fixed bug which could cause relays to click on and off at low charge.
- Minimum charge voltage was increased to 3.4V.
- Fixed bug which could cause battery to drain empty.
- Status menu moved to top for easier access.

June 29 2012: V1.11

- Fixed bug which could cause a low battery to completely drain because the firmware repeatedly woke up the PP instead of staying in deep sleep mode
- Various bug fixes

May 3 2012: V1.9

- Display contrast is now better
- Bug Fix: Under some conditions the LCD diplay can display garbage or become blank, with only the backlight working. Note that
  if you experience this problem, press the joystick for 8 seconds so the PP reboots.  Then you can see the display and upgrade
  to firmware 1.9.

April 16 2012: V1.8

- First public release of PurePower.  Please upgrade to this if you have a lower version.
- Faster user interface
- More responsive user interface while AP is playing music.
- Bug Fix: 15 hour battery graph now updates faster to provide a real 15 hour graph.
- Bug Fix: When battery is full, the relays could begin clicking as charging turns on and off repeatedly
- Bug Fix: When doing firmware update the screen no longer gets corrupted
- Various bug fixes and cleanup

April 4 2012: V1.3

V1.03

- initial beta release shipped with first batch of units

