ESP8266 doesn't wake from deep sleep

Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)
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Re: ESP8266 doesn't wake from deep sleep

By eriksl
- Sun Oct 03, 2021 5:41 am #92523 I recognise this. At this point RF calibration takes places, which takes a lot of power (far more than using normal operation). So make sure your power supply can deliver at least 500 mA without dipping and add a big capacitor (think 1000 uF).
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Re: ESP8266 doesn't wake from deep sleep

By washburn_it
- Sun Oct 03, 2021 8:17 am #92524 I tried to use a Raspberry Pi4 power supply (5V 3A), connect a LED to a GPIO but the problem remains...at the first boot the LED turns on, then after 10 sec. it enters in a 30 sec. deep sleep.
After 30 sec. nothing happens, the LED stays off.
I have to power off the ESP...
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Re: ESP8266 doesn't wake from deep sleep

By btidey
- Sun Oct 03, 2021 4:32 pm #92527 You say you are using a ESP-12E module and a Raspberry Pi PS. The latter is 5V whereas the ESP needs 3.3V so I assume you are using some regulator in between. Could it be the regulator you are using is the source of the problem?

I note that HiLetgo do various modules from raw ESP-12E to a Wemos lookalike which includes an on board regulator. So you need to say what module you are using.
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