// part of the groworld HPI prototype

#include <stdio.h>
 
#define lightpin 1  // light sensor on analog pin 1
#define humidpin 0  // humidity sensor on analog pin 0
#define power 8     // power for sensors

unsigned long then = 0; // timer which will run for < 50 days
unsigned long interval = 1; // interval between reads in seconds

void setup()  
{ 
  pinMode(power, OUTPUT);
  pinMode(humidpin, INPUT);
  pinMode(lightpin, INPUT);

  Serial.begin(9600); 
}

int lightlevel () 
{
  int light = 0;
  light = (analogRead(lightpin)); 
  return light; 
}

int moisturelevel () 
{
      int moist = 0;
      digitalWrite(power, HIGH);
      moist = (analogRead(humidpin)); 
      digitalWrite(power, LOW);
      return moist; 
}

char display[64];

void loop() 
{ 
    if (millis() - then > interval*1000) {
      then = millis(); 
      sprintf(display, "%u,%u,%u\n", (unsigned int)then, lightlevel(), moisturelevel());
      Serial.print(display);
  }
}