- Thu Jun 16, 2016 10:20 am
#49278
Hello,
I understood that the ESP8266 is pretty much identical to "whole chip powered down", just the RTC might still be running to finally generate a pulse on GPIO16, which, if connected to RST might wake up the chip.
That said, I wonder if anyone knows whether the ESP8266 will keep its GPIO states while in deep-sleep mode.
Simple example: assume there is a LED connected to one of the GPIO4. I would like to light up the LED, then go to deep-sleep for 10 seconds, and after coming back from deep sleep, disable the LED. This can only work if the chip keeps GPIO4 high during the deep-sleep period.
Does anyone know whether this works? Or are the GPIO output states just 'undefined' during deep sleep?
Greetings,
Roland
I understood that the ESP8266 is pretty much identical to "whole chip powered down", just the RTC might still be running to finally generate a pulse on GPIO16, which, if connected to RST might wake up the chip.
That said, I wonder if anyone knows whether the ESP8266 will keep its GPIO states while in deep-sleep mode.
Simple example: assume there is a LED connected to one of the GPIO4. I would like to light up the LED, then go to deep-sleep for 10 seconds, and after coming back from deep sleep, disable the LED. This can only work if the chip keeps GPIO4 high during the deep-sleep period.
Does anyone know whether this works? Or are the GPIO output states just 'undefined' during deep sleep?
Greetings,
Roland
