Rain gauge not working with arduino UNO WiFi

Projects Programming
1

Hi,
I am trying to use a rain gauge (https://images.app.goo.gl/cMo9FG6oEzXPDaTc7) with Arduino UNO WiFi rev2. The rain gauge works using reed switch. I tried to dowload the sketch attached to Arduino UNO R3 and it works fine.
I compiled the same program with the UNO WIFI Rev2. No problem.
I downloaded it on the card, always OK. A launch the sketch, it seem to work; but nothing happens.
I have already delete "digitalPinToInterrupt" in the line attachInterrupt(2, Basculata, FALLING);.
Are there any other errors? Maybe I have to change some settings on Arduino IDE?
Why doesn't it work?

Thanks in advance


#include <SPI.h>

float TotPioggia = 0;
int nbasculata = 0;
int conto;
boolean blnWrite=false;

void setup()
{
  Serial.begin(9600);
  Serial.println("Start");
  attachInterrupt(2, Basculata, FALLING); //LOW CHANGE RISING FALLING
}
 
void loop()
{
  interrupts();
  delay(1000);
  if (blnWrite==1)
  {
    blnWrite=false;
    Serial.println("Pioggia mm: " + (String)TotPioggia);
    delay(50);
    conto = nbasculata/3;
    Serial.println("Numero basculata: " + (String)conto);
    delay(50);
    Serial.println("--------------------------");
    delay(50);
  }
}
 
void Basculata()
{
  noInterrupts();
  //TotPioggia = TotPioggia + 0.3;
  nbasculata++;
  TotPioggia = (nbasculata/3)*0.3;
  delay(500);
  blnWrite=true; //segnalo che è avvenuta una basculata
}
2

Interrupts are disabled during an ISR execution, you do not have to disable them.

Interrupts are disabled during an ISR, delay depends on interrupts. See a problem there?

The processors are different between the Uno (mega328) and WiFi Uno (mega4809) so the pins may not be the same. Like the SPI pins.

3

According to the doc, all digital pins should be able to take interrupts on the Uno Wifi Rev2 - see attachInterrupt() - Arduino-Referenz

4

The delay() function does not work within an interrupt function.

1 Like
5

Actually if I delete the command it still doesn't work, but thank you anyway.....

I've tried deleting the delay and it works, thank you! I'm still holding the "noInterrupts();" and it gives me no problem!

Can some help me to understand why it counts 3 instead of 1 each time the reed switch "clicks"? I have to divide it by 3, if I don't do that I read a wrong information....

6

Please explain the above line.

Contact bounce might explain excess counts.

I'm still holding the "noInterrupts();" and it gives me no problem!

Of course not. Interrupts are already turned off.

7

0,3 is the rain gauge's tray's capacitance [mm]. 0,3 multiplied the number of nbasculata = mm rain fall in a day for example. nbasculata means the number of times reed switch clicks.

8

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