picow: Turn off wifi co-processor regulator when entering deep sleep #7050
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This reduces power consumption during true deep sleep. In my measurements with ppk2 and a program that _irrevocably_ entered deep sleep (no time alarm or pin alarm), power usage as measured on a ppk2 decreased from ~10mA to ~1mA.
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This reduces power consumption during true deep sleep.
In my measurements with ppk2 and a program that irrevocably entered deep sleep (no time alarm or pin alarm), power usage as measured on a ppk2 decreased from ~10mA to ~1mA.
Closes: #7047 (or at least improves on the status quo)
ppk graph, before (right hand side represents deep sleep):
zoomed in on the right:
after, zoomed in on deep sleep:
Using pin alarms or time alarms still incurs a power cost. Light sleep and fake deep sleep are not improved/changed by this PR.