This is a significant change from the original alarm clock code published by Brian Lough.

The following things have been changed:

• Fixed several of bugs
• Removed all the google maps code that calculates trip delays. I couldn't find the library Brian was using and I didn't need the functionality
• Added support for Ring Tone Text Transfer Language - RTTTL alarm sounds (see ringtones.rtttl file for hundreds of sounds you can use)
• Added support for a unique alarm time each day
• Removed snooze functionality
• The alarm rings forever until acknowledged
• Reduced frequency of NTP time requests to every 15 minutes (1 minute on error)
• Changed to 12 hour display format
• Used the left two vertical lines and the horizontal line in the left-most seven segment display to display AM/PM and global alarm disable
• Changed the meanings / functions of the buttons
• left button shows the last byte of the clock's IP address
• right button held for 2 seconds disables / enables global alarms (also plays the alarm sound when re-enabling alarms)
• both buttons show the realtime value from the LDR
• when the alarm is playing, either button instantly stops the alarm; there is no "snooze"
• Implemented threading using Protothreads - Lightweight, Stackless Threads in C
• changed the SPIFFS storage format to a binary representation of the alarmInfo structure