Can We Use Adhan as Alarm Clock?

Can we use the adhan as an alarm clock to wake up for Fajr, for meetings at work or prayer times in general? 

It is allowed, especially for prayer, because the adhan is a form of motivation. Anything that is going to help us wake up and assist with our religious obligations should be used to the best of its advantage! 

What to Say upon Hearing the Adhan?