deepsleep maximum time

[dhk111]

@seb thank you for the reply.
can you please tell me why 3 byte value.

[seb]

Hi,

Q1) The deepsleep time is set as a 3 byte value in seconds, so therefore the maximum sleep time is 2^(8*3) seconds = 16,777,216 seconds = 27.7 weeks

Q2) In regards to waking on pin P17 please see the docs here: https://docs.pycom.io/chapter/datasheets/boards/deepsleep/api.html

You can do this like so:

ds.enable_pullups('P17')
ds.enable_wake_on_fall('P17') 
ds.enable_wake_on_fall('P17')
ds.go_to_sleep(100) #Sleep for 100s

When the deep sleep shield goes to sleep, the LoPy will be completely unpowered, when it wakes up (either via a change on P17 or after 100s in the example above) the LoPy will begin code execution just as if you had pressed the reset button on the module.

I hope this answers your questions