#include "cmdArduino.h"
#define ADC_UNITS 1024
#define ADC_REF_VOLTAGE 3.3
#define ADC_SCALE_FACTOR 2

int pinBatt = A6;

void setup()
{
  cmd.begin(57600);
  Serial.println("Lab 3b - Battery Status on command");
 
  pinMode(pinBatt, INPUT);
  cmd.add("batt", cmdBatt);
}

void loop()
{
  cmd.poll();
}

void cmdBatt(int argCnt, char **args)
{
  int battAdc = analogRead(pinBatt);
  float VoltsPerUnit = ADC_REF_VOLTAGE / ADC_UNITS;
  float battVoltage = battAdc * VoltsPerUnit * ADC_SCALE_FACTOR;

  Serial.print("Raw ADC value: ");
  Serial.print(battAdc);
  Serial.print(", Battery Voltage: ");
  Serial.println(battVoltage);
}