Revision history (for those who're just curious, you can't get firmware file to update anyways)

1.00		Initial release (4 tubes, alarm function)
1.05		12/24 hour mode and other improvements
1.14	 	Added LCD screen support
1.55		Added adjustable backlight option

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2.00		Hardware update to 6 tube version with USB PD support
2.24		Small improvements and updated circuitry. Mass release
2.32		Improved USB PD Support
2.35		Small cosmetic fixes, added tube soldering check option

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3.00		New hardware platform, 8 tubes,Graphic LCD, FM radio/GPS/Rh/thermometer support