ESP8266 interrupts issue

Question

i am using esp8266 to calculate the rpm using hall 3144 sensor, and while doing so there is an issue arises in code.

void exti_callback()
{
Serial.println("working");
}
void setup() {

pinMode(D1,INPUT);
attachInterrupt(digitalPinToInterrupt(D1),exti_callback,FALLING);
Serial.begin(115200);
}

void loop() {
Serial.println("Not working");
}

upon further investigation i understand that this specific line

attachInterrupt(digitalPinToInterrupt(D1),exti_callback,FALLING);

of code is giving me error. Earlier i was using D2 pin and was still facing the same error so i thought i am using wrong pin to get the interrupt so i change that pin to pin D1 but same error still persists. How did i know that this line is giving me error because if i comment out this line, whole code works perfectly, and void loop () also starts to work fine then.

I have even tried using different baud rate, different upload rate but the issue persists. I have even change the USB cable, USB port and what not but still error came. This is the error.

load 0x4010f000, len 3424, room 16
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8 
tail 0
chksum 0x2b
csum 0x2b
v00041f10
~ld
⸮⸮⸮⸮o쒜p⸮⸮n|⸮l⸮⸮$`b⸮⸮|r⸮$⸮o⸮⸮o⸮
ets Jan  8 2013,rst cause:2, boot mode:(3,6)

this same error is keep getting generated again and again.

I have even tried using different baud rate, different upload rate but the issue persists. I have even change the USB cable, USB port and what not but still error came.

EDIT#1

I tried your Button code as said by @MartinR its giving same error. But i have made a progress

int flag = 0;
void ICACHE_RAM_ATTR hallInterrupt();
void setup() {
Serial.begin(115200);
pinMode(D5, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(D5), hallInterrupt, FALLING);
}

void loop() {
Serial.println(flag);
delay(500);

}
void hallInterrupt()
{
flag = 1;
delay(500);
}

this code at least run without giving the previous error but still this code unable to enter the interrupt function. I mean to say that this code is printing 0, but as soon i provide some interrupts to hall sensor using magnets it's giving me new kind of hex numberical error.

Please see How to Ask, then revise your title to ask a clear, specific question and not just state that you have an issue. We all have issues. Also take the tour. — isherwood
– isherwood, Commented Dec 20, 2023 at 16:23
1) For ESP8266, ISR() function need to have ICACHE_RAM_ATTR attribute (meaning to run it from RAM). Read documentation on interrupt. 2) add volatile to the declaration of flag to avoid it from being over-optimized away by the compiler. — hcheung
– hcheung, Commented Dec 26, 2023 at 8:59

MartinR · Accepted Answer · 2023-12-20 16:24:59Z

0

Try defining D1 as GPIO 5 which is the corresponding pin if im not wrong.

#define D1 5

If somehow D1 is reserved try calling it different (BUTTON for example).

#define BUTTON 5

void exti_callback()
{
Serial.println("working");
}
void setup() {

pinMode(BUTTON,INPUT);
attachInterrupt(BUTTON,exti_callback,FALLING);
Serial.begin(115200);
}

void loop() {
Serial.println("Not working");
delay(500);
}

Hope this helps.

#EDIT:

Code Working Screencap

Your edited code working Screencap

edited Dec 20, 2023 at 16:24

answered Dec 20, 2023 at 11:58

MartinR

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6 Comments

Ryu Over a year ago

it's not working still. I have used all the pin from D1 to D8 still the error is same. Could u help me to resolve the error, like what that error is trying to say?

MartinR Over a year ago

Have you tried a code like this? I eddited the previous comment with the actual modified code. The error code is due to a boot of the board due to a possible coding error.

MartinR Over a year ago

And btw, watch out the function attachInterrupt(digitalPinToInterrupt(D1),exti_callback,FALLING); The function should look like this: attachInterrupt(GPIOPin, ISR, Mode); so for the first argument just put the GPIO pin.

Ryu Over a year ago

Kindly look into the question again. i have edited it with my progress.

MartinR Over a year ago

Well, I don´t know what to say... I just tried the code in my ESP board and works perfectly for me. I would try to change the hall sensor for a simple button for testing, but the code i provided you just works fine. (Also added a delay for debuging...)

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