I have one powered up on the bench running nodemcu and happy to task as
required to repeat you experiment. Just send whatever test code and I will
attempt the test on a ESP12
Justin
On 24/10/2015 12:47 PM, "James Cameron" <quozl@laptop.org> wrote:

> [repost with tag, thanks Justin]
>
> G'day,
>
> I've been using a deep sleep mode on the ESP8266 for a few weeks now,
> and it works fine on ESP-01 modules if XPD_DCDC (8) is tied to
> EXT_RSTB (32).
>
> On waking, the CPU restarts from the reset vector.
>
> I'm evaluating a carrier board for the ESP-12 module, the Adafruit
> Huzzah, where waking up doesn't always work.  It works for about
> 15 to 20 minutes, then there's no evidence of code execution.  It is
> as if it has entered programming mode.
>
> Oddly, grounding EXT_RSTB momentarily does not reset it.
>
> Removing power for one second does clear the state.
>
> The test program is written in Lua:
>
> tmr.alarm(2, 5000, 0, function() node.dsleep(55000000) end)
>
> Which means schedule an alarm 5 seconds from now which runs a function
> that invokes deep sleep for 55 seconds.
>
> The module is configured to join an access point, and does succeed
> within 5 seconds.
>
> I've tried a few things; microscope inspection, forcing all unused
> pins to outputs, external 3.3V regulator, different versions of
> NodeMCU firmware, pulling up GPIO0, and bypassing a diode on the
> carrier that protects EXT_RSTB.
>
> What else to try?
>
> References:
>
> http://www.adafruit.com/product/2471
>
> https://learn.adafruit.com/downloads/pdf/adafruit-huzzah-esp8266-breakout=
..pdf
>
> http://community.littlebirdelectronics.com/t/adafruit-huzzah-doesnt-wake/=
288/4
> (schematic attached, 29323 bytes)
>
> --
> James Cameron
> http://quozl.linux.org.au/
> --
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