It looked like they were having difficulty making a pH probe circuit that didn't require 2x 9v batteries, but I didn't look to far into it. I'm not going to be building a pH probe as it's never been an issue or concern for me. I have a nice hand held probe that I use for the occasional testing.
I played with the clock library and got it to display the set time on the screen, I'm not sure how I keep the clock set, it doesn't seem to work if I take out the code to set the time, but obviously I wouldn't it want it to set to the same exact time everytime it powers up since that will change.
Here's the code I'm using if anyone has any input on reading the clock's date. It seems like I should be able to set the clock once, and have it remember the time until the battery runs out right?
#include <LiquidCrystal.h>
#include <WProgram.h>
#include <Wire.h>
#include <DS1307.h>
// Connections:
// rs (LCD pin 4) to Arduino pin 12
// rw (LCD pin 5) to Arduino pin 11
// enable (LCD pin 6) to Arduino pin 10
// LCD pin 15 to Arduino pin 13
// LCD pins d4, d5, d6, d7 to Arduino pins 5, 4, 3, 2
LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);
int backLight = 13; // pin 13 will control the backlight
void setup()
{
//CLOCK
RTC.stop();
RTC.set(DS1307_SEC,1); //set the seconds
RTC.set(DS1307_MIN,55); //set the minutes
RTC.set(DS1307_HR,3); //set the hours
RTC.set(DS1307_DOW,6); //set the day of the week
RTC.set(DS1307_DATE,16); //set the date
RTC.set(DS1307_MTH,4); //set the month
RTC.set(DS1307_YR,10); //set the year
RTC.start();
//LCD
pinMode(backLight, OUTPUT);
digitalWrite(backLight, HIGH); // turn backlight on. Replace 'HIGH' with 'LOW' to turn it off.
lcd.begin(4,20); // rows, columns. use 2,16 for a 2x16 LCD, etc.
lcd.clear(); // start with a blank screen
lcd.setCursor(0,0); // set cursor to column 0, row 0 (the first row)
lcd.print("Aquarium Controller"); // change this text to whatever you like. keep it clean.
lcd.setCursor(7,1); // set cursor to column 0, row 1
lcd.print("Ludnix");
delay(3000);
}
void loop()
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Aquarium Controller");
lcd.setCursor(0,1);
lcd.print("");
lcd.setCursor(0,2);
lcd.print("");
lcd.setCursor(0,3);
lcd.print(RTC.get(DS1307_HR,true));
lcd.print(":");
lcd.print(RTC.get(DS1307_MIN,false));
lcd.print(":");
lcd.print(RTC.get(DS1307_SEC,false));
delay(1000);
}
EDIT:
Nevermind, removing that section that sets the time in the setup does work for keeping time. I just happened to look when the time was 0 and thought it wasn't working!