How to know if the ESP8266 has been manually reset?

Question

I have a code looping with the help of the dsleep mode. Each time dsleep ends, the init.lua is loaded, does something the goes back to sleep.

Now I want to implement a button to my ESP8266 that will trigger the reset pin. When pushed, my system should enter in a "setup mode", providing AP to do some setup (that part of code is OK).

My problem is: How do I know if the current init was triggered manually (then go to setup mode) or by normal reboot after dsleep?

I'm guessing that there should be two ways doing this:

programmatically: somehow store a meta-global variable changed by the gpio15 trigger in the end of dsleep ...
electronically: hack something to change one pin state when pushing reset button

Any advice?

please select the correct answer. – Marcel Stör Feb 29 '16 at 18:49 — Marcel Stör, Feb 29 '16 at 18:49

score 2 · Answer 1 · answered Nov 14 '15 at 17:58

2

I know for a fact that it's possible (without any hacks) with the Arduino IDE with ESP.getResetInfoPtr(). A guy used it here

I don't think it has been enabled in nodemcu firmware.

answered Nov 14 '15 at 17:58

seblucas

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NodeMCU does have that as pointed out in the other answer, [`node.bootreason`](http://nodemcu.readthedocs.org/en/dev/en/modules/node/#nodebootreason). – Marcel Stör Feb 29 '16 at 18:48

score 1 · Accepted Answer · edited Feb 29 '16 at 18:46

1

You can get the reboot reason by using the node.bootreason() function.

Sample Code is (you can omit any variables after code, reason if you don't need the additional information:

code, reason, exccause, epc1, epc2, epc3, excvaddr, depc = node.bootreason()

edited Feb 29 '16 at 18:46

Marcel Stör

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answered Jan 30 '16 at 21:12

Adam B

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Is there a definition of `exccause`? I could find code and reson, but not the latter. – dda Mar 30 '16 at 06:18

score 1 · Answer 3 · answered Dec 05 '19 at 20:01

This functionality is implemented by Espressif in their SDK:

int reason = ESP.getResetInfoPtr()->reason;


switch (reason) {
    case REASON_DEFAULT_RST:
        // Normal Power up
        break;
    case REASON_WDT_RST:
        break;
    case REASON_EXCEPTION_RST:
        break;
    case REASON_SOFT_WDT_RST:
        break;
    case REASON_SOFT_RESTART:
        break;
    case REASON_DEEP_SLEEP_AWAKE:
        break;
    case REASON_EXT_SYS_RST:
        break;

    default:
        break;
    }

How to know if the ESP8266 has been manually reset?

3 Answers3