Using reset pin and millis() how i reset Mega board every 1 hour interval

Projects Programming
1

I have to reset my Arduino mega board every 1 hour. Can anyone help?

2

why?

3

Juraj:
why?

I bet everyone wanted to ask that but you beat everyone to it :wink:

4

Juraj:
why?

When I checking continuously sensor data device give wrong value and if restart it starts working fine.
So, I want to restart the device.

5

bytebd:
When I checking continuously sensor data device give wrong value and if restart it starts working fine.
So, I want to restart the device.

solve the problem

6

Juraj:
solve the problem

Or to put it another way :wink: if you want help solving the problem post the code and schematic, and link to the sensor datasheet.

Resetting the device is so I.T. Crowd...

have you tried.GIF

have you tried.GIF

7

Juraj:
solve the problem

No, Now I am now doing this by manually, so I want to do it by automatically

8

and you don't know how to code the timing or the reset?

9

bytebd:
Now I am now doing this by manually, so I want to do it by automatically

Yeah we get that, but you still haven't said why you don't fix the underlying problem in the first place.

:slight_smile: Maybe you could rig a small servo to press the reset button?

10

bytebd:
No, Now I am now doing this by manually, so I want to do it by automatically

With properly written code there should be no need to reset the Arduino.

If you really need a back-up in case of a failure of the program then that is what the Watchdog Timer is for.

...R

11

I am using something like this with Watchdog

#include <avr/wdt.h>

void setup() {
  wdt_disable();
  Serial.begin(19200);
  Serial.println("Setup! Check the LED.");
  pinMode(13, OUTPUT);
  delay(5000);
  wdt_enable(WDTO_2S);
}

void loop() {
  Serial.println("Main Loop!");
  for (int cnt = 0; cnt < 5; cnt++) {
    Serial.println(cnt);
    delay(500);
    digitalWrite(13, LOW);
    delay(500);
    digitalWrite(13, HIGH);
    wdt_reset();
  }

  Serial.println("Reset by Watch Dog?");
  delay(3000);

  // Code should never get to here
  Serial.println("Reset failed");
}
12

bytebd:
I am using something like this with Watchdog

Did it solve the problem?

13

Micros() rollover, 71.5827882667 minutes? Need to see code.

14

outsider:
Micros() rollover, 71.5827882667 minutes? Need to see code.

I was thinking millis() and wondered how it could be the culprit; but I always forget about micros()- you're probably right.

15

bytebd:
I am using something like this with Watchdog

The difference between your code and "something like it" could be fatal. Post the actual program that is causing the problem.

...R