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[GH-ISSUE #889] why restart-up while attachInterrupt used; #753

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opened 2026-02-28 01:26:53 +03:00 by kerem · 4 comments

kerem commented

2026-02-28 01:26:53 +03:00

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Originally created by @wsdxyz on GitHub (May 22, 2019).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/889

Basic Infos

why esp8266 always restart-up while attachInterrupt used;

Hardware

**Esp8266

ESP8266

**Hardware: ESP-12e,

ESP12 E(nodemcu)

Description

why esp8266 always restart-up while attachInterrupt used;

Settings in IDE

Module: NodeMcu,

Additional libraries:
#include "WIFIManager.h"

Sketch

void setup() {
attachInterrupt(5,interrupt_1,3);
}

void loop() {
// put your main code here, to run repeatedly:
}

void interrupt_1 ()
{

}

#include <Arduino.h>

void setup() {

}

void loop() {

}

Debug Messages

[Info] Opened the serial port - COM29
r$
ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
vac02aff5
~ld
[Done] Closed the serial port

Originally created by @wsdxyz on GitHub (May 22, 2019). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/889 ### Basic Infos why esp8266 always restart-up while attachInterrupt used; #### Hardware **Esp8266 - [ ] ESP8266 **Hardware: ESP-12e, - [ ] ESP12 E(nodemcu) ### Description why esp8266 always restart-up while attachInterrupt used; ### Settings in IDE Module: NodeMcu, Additional libraries: #include "WIFIManager.h" ### Sketch void setup() { attachInterrupt(5,interrupt_1,3); } void loop() { // put your main code here, to run repeatedly: } void interrupt_1 () { } #include <Arduino.h> void setup() { } void loop() { } ### Debug Messages [Info] Opened the serial port - COM29 r$ ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x4010f000, len 1384, room 16 tail 8 chksum 0x2d csum 0x2d vac02aff5 ~ld [Done] Closed the serial port

kerem closed this issue

2026-02-28 01:26:53 +03:00

kerem commented

2026-02-28 01:26:54 +03:00

Author

Owner

@tablatronix commented on GitHub (May 22, 2019):

and it works if you remove wifimanager?

@tablatronix commented on GitHub (May 22, 2019): and it works if you remove wifimanager?

kerem commented

2026-02-28 01:26:54 +03:00

Author

Owner

@tablatronix commented on GitHub (May 22, 2019):

Should interrupt_1 be in IRAM?
ICACHE_RAM_ATTR

@tablatronix commented on GitHub (May 22, 2019): Should interrupt_1 be in IRAM? `ICACHE_RAM_ATTR`

kerem commented

2026-02-28 01:26:54 +03:00

Author

Owner

@wsdxyz commented on GitHub (May 23, 2019):

hi, tablatronix, thanks for your reply.
it's worked while i only use attachInterrupt without #include WiFiManager;
and also worked while #include WiFiManager without attchInterrupt
but not works while only conbined them both;

@wsdxyz commented on GitHub (May 23, 2019): hi, tablatronix, thanks for your reply. it's worked while i only use attachInterrupt without #include WiFiManager; and also worked while #include WiFiManager without attchInterrupt but not works while only conbined them both;

kerem commented

2026-02-28 01:26:54 +03:00

Author

Owner

@wsdxyz commented on GitHub (May 23, 2019):

hi, tablatronix, Thanks a lot for your solution on ICACHE_RAM_ATTR!
this problem of restart-up is perfectly solved by your solution: ICACHE_RAM_ATTR.
below is my code:
void ICACHE_RAM_ATTR interrupt_1 () ;

@wsdxyz commented on GitHub (May 23, 2019): hi, tablatronix, Thanks a lot for your solution on ICACHE_RAM_ATTR! this problem of restart-up is perfectly solved by your solution: ICACHE_RAM_ATTR. below is my code: void ICACHE_RAM_ATTR interrupt_1 () ;