ESP8266 Community Forum

- Mon Jun 15, 2015 2:59 pm #20527 I want to put an ESP8266 into deep sleep, waking every, say, 10 minutes to make and report a measurement. I'd also like a means of forcing the ESP8266 to wake up through a button press. If I connect GPIO16 to nRST to allow deep sleep wake-up to operate is there any way to distinguish this event from a button press on the nRST pin? I don't feel that it is possible but thought I should ask.

In general how can a deep sleep device be forced to wake to do something other than it would normally do on wake-up? I have seen mention somewhere of generating a reset event by capacitive coupling - perhaps this could be combined by a switch on a GPIO to allow the state of the GPIO to be checked after reset. Has anyone tried this successfully?

- Tue Jun 23, 2015 4:34 am #21349 When it comes out of deepSleep() I think a pulse is sent out on GPIO16(XPD) it is attached to the reset pin and I have always used a small capacitor but others say a direct link works . That pulse causes a reset and the program starts from scratch again. So if you put a button on reset to ground that should do the job . It will restart from scratch and then wait the normal deepSleep() time until the next reset pulse .

No clue as to how to make it do something different unless you write a variable to EEPROM ...say state=1 in your program and on wake up have your program read that variable from EEPROM and do something else if it is 1. Manipulation of EEPROM is in the ESP8266 examples

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG