//library of the multiplexors
#include <CD74HC4067.h>
//library for calculating RMSvalues
#include <TrueRMS.h>
// loop period time in microseconds (time between samples)
#define LPERIOD 1000
// define the used ADC input channel
#define ADC_INPUT 0
// RMS window of 40 samples, means 2 periods at 50Hz
#define RMS_WINDOW 40
unsigned long nextLoop;
int adcVal;
int cnt=0;
// ADC full scale peak-to-peak is 5.00Volts
float VoltRange = 5.00;
// create an instance
Rms readRms ;
CD74HC4067 my_mux(22,23,24,25);
CD74HC4067 my_mux2(26,27,28,29);
CD74HC4067 my_mux3(30,31,32,33);
CD74HC4067 my_mux4(34,35,36,37);
void setup()
{
pinMode(A0, INPUT);
Serial.begin(9600);
Serial.println("LABEL,v");
Serial.print("DATA, ");
readRms.begin(VoltRange, RMS_WINDOW, ADC_10BIT, BLR_ON,CNT_SCAN);
readRms.start();
// Set the loop timer variable for the next loop interval.
//micros( ) Returns the number of microseconds since the Arduino board began running the current program.
nextLoop = micros() + LPERIOD;
//electrode 0 and 1//electrode 0 and 1
my_mux.channel(0);
my_mux2.channel(1);
for (int k=2;k<15;k++)
{
my_mux3.channel(k);
my_mux4.channel(k+1);
for(int i=0;i<500;i++)
{
// Read the ADC and remove the DC-offset
adcVal = analogRead(ADC_INPUT);
//take an instance again
readRms.update(adcVal);
cnt++;
//repeating the readings of one sample
if(cnt >= 500)
{
// publish every 0.5s
readRms.publish();
Serial.print(readRms.rmsVal,2);
Serial.println();
Serial.print("DATA, ");
cnt=0;
}
// wait until the end of the time interval
while(nextLoop > micros());
// set next loop time to current time + LOOP_PERIOD
nextLoop += LPERIOD;
}
}
}
void loop(){
}