Great contest! Thank you. One small and insignificant error in the answer.

"We can use this value to determine how long the AP has been online by converting it to decimal and dividing it by one million, the number of microseconds in a second.  The value 0x19185 in decimal is 102709, divided by one million … this AP has been online for one tenth of a second.""

0x19185 is decimal 102789 not 102709. 

Just pointing it out. But again, I love these contests and thank you for doing them.