Emonlib only some inputs are working

Using Arduino Project Guidance
1

Hello,
I have designed a little board to read 4 SCT-013 60A/1V Sensors. All wired up like this. Board is an Arduino Nano.

I now have the strange behavoir, that the values of two inputs work fine, but the other two not. I have read the analog inputs directly to see if there is something wrong but for me all looks ok.
Do you have any Idea why input 3 und 4 (gree and yellow) work and 1 and 2 (blue and red) not?
1 and 2 have a little lower voltage, but I don't think that should be a problem.

Thank You

Here are the plots.
Analog inputy read directly without load

grafik
grafik889×1560 78.6 KB

Code.
When I set DEBUG to false I get the output of Emonlib, if I set it to true I get the direct readings

#include "EmonLib.h"
EnergyMonitor emon1,emon2,emon3,emon4;

#define DEBUG false

#define ADC_INPUT1 1
#define ADC_INPUT2 2
#define ADC_INPUT3 3
#define ADC_INPUT4 4

void setup()
{
  Serial.begin(500000);

  if (!DEBUG)
  {
  emon1.current(ADC_INPUT1, 111.1);             
  emon2.current(ADC_INPUT2, 111.1);             
  emon3.current(ADC_INPUT3, 111.1);             
  emon4.current(ADC_INPUT4, 111.1);             
  }
}

void loop()
{
  if (not DEBUG)  
  {
    double Irms1 = emon1.calcIrms(1480);  
    double Irms2 = emon2.calcIrms(1480);  
    double Irms3 = emon3.calcIrms(1480);  
    double Irms4 = emon4.calcIrms(1480);  
    
    Serial.print(Irms1);           
    Serial.print(" ");
    Serial.print(Irms2);           
    Serial.print(" ");
    Serial.print(Irms3);           
    Serial.print(" ");
    Serial.print(Irms4);           
    Serial.println();               
  }
  else
  {
    Serial.print(analogRead(ADC_INPUT1)); 
    Serial.print(" ");
    Serial.print(analogRead(ADC_INPUT2)); 
    Serial.print(" ");
    Serial.print(analogRead(ADC_INPUT3)); 
    Serial.print(" ");
    Serial.print(analogRead(ADC_INPUT4)); 
    Serial.println();
  } 
}
2

I found the problem! The PINs for A1 and A2 where not soldered properly. Oddly enough they returned values but only if I read A3 too. Nevermind now its working fine :slight_smile:

3

Haha. When explaining the problem the fault is often found. Your description sounded like hardware error.

4

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