Example and consumption of STM32F411CEU6 in deep sleep

[snorkman88]

Awesome repo, very well documented!
Have you tested the deep sleep function? Do you have an example?
Have you measured the deep sleep current consumption?

[dukeduck1984]

No. I just did 'hello world' test in REPL, and nothing beyond that point. Pls let me know if you have done the test :-)