Sleep Mode Description
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How does sleep work, help doc doesn't explain it? When the device goes to sleep, what memory is retained? Does it continue from where it left off or restarts boot & main. Did I miss the doco for this?
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@jcaron said in Sleep Mode Description:
@paul-thornton To be precise, it actually starts from the top of boot.py :-)
While you're in the docs, I don't think the read_battery_voltage method for the Pysense/Pytrack/etc. is in the docs, you may want to add that as well.Thanks ill get this added today if its missing.
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@misterlisty Yes, it acts exactly as on a power on, it executes
boot.pythenmain.py.The only way to know whether it's a power on or a wake from sleep (and what the reason for the wake up was) is to call
machine.wake_reason.The possible reasons are listed in the constants at the bottom of the page:
machine.PWRON_WAKE,machine.PIN_WAKE,machine.RTC_WAKE,machine.ULP_WAKE.
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From what i read above, it would also restart boot.py?
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@paul-thornton To be precise, it actually starts from the top of boot.py :-)
While you're in the docs, I don't think the read_battery_voltage method for the Pysense/Pytrack/etc. is in the docs, you may want to add that as well.
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The wording on that isnt brilliant. but yes. it restarts from the top of main.py again. ill update the docs to be clearer
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@misterlisty If you mean deep sleep, in all cases, all CPU memory and CPU state is lost, and on wake-up it's like the module was just powered on.
This is in the docs, though it's perhaps not that clear.
For
machine.deepsleep:https://docs.pycom.io/firmwareapi/pycom/machine/#machinedeepsleeptimems
Stops the CPU and all peripherals, including the networking interfaces (except for LTE). Execution is resumed from the main script, just as with a reset.
Note that at the ESP32 level the RTC domain including its memory is kept active, but there's no support for that at the micropython level.
In the case of Pysense/Pytrack/Deep Sleep Shield-controlled deep sleep, it's even worse, as power to the ESP32 is cut.