Hi all! I picked up a 4 channel relay board and have been playing around with it lately. I have an arduino uno and got everything wired up, and was able to flash a 120v ac light bulb. Then i stumbled across using your keyboard to turn it on and off.. cool! i was really excited. Now im wanting to actually use this thing and make a timer to control 2(for now) 120v ac plug ins--water pump and lights for my aquaponics system. I have been at this all day, and am slowly removing compiling errors. Unfortunately, I have zero-to-none knowledge in the programming field, and im jumping in to something pretty big here, i know that. I need the light on for x amount of hours and water pump to turn on for 15 mins, off for 15, on for 15 and so on..
Here is what i haved cooked up.
#include <Time.h>
#include <DateTime.h>
#include <TimeAlarms.h>
#define RELAY_PIN 13
AlarmID_t myTimer;
void OnTimer(AlarmID_t Sender){
// add code here to execute when the timer triggers
Serial.println("timer triggered");
pinMode(RELAY_PIN, OUTPUT);
Serial.begin(9600); // open serial
//Change the time to the current time (else will default to 01/01/2009)
DateTime newLocalTime = new DateTime(2012,8,12,20,04,00);
Utility.SetLocalTime(newLocalTime);
/*Creates a timer that calls the OnTimer method immediately after creation
and then calls it every 900000 milliseconds (15 minutes or every 900 seconds)*/
System.Threading.Timer timer = new System.Threading.Timer(new TimerCallback(OnTimer), null, 0, 900000);
Thread.Sleep(Timeout.Infinite);
}
void setup(){
Serial.begin(9600);
pinMode(13,OUTPUT); // we will flash the LED on and off each second in loop
}
void loop(){
{
myTimer = dtAlarms.createTimer( AlarmHMS(0, 5, 0), &OnTimer); // create a timer with period: 0 hrs, 5 minutes, 0 seconds
DateTime.sync(0); // Start the clock
}
dtAlarms.delay(1000); // call dtAlarms.delay instead of delay so the alarms can be serviced
digitalWrite(13,HIGH);
dtAlarms.delay(1000);
digitalWrite(13,LOW);
}
}
}
And this is what it threw back at me..
jay.cpp: In function 'void OnTimer(AlarmID_t)':
jay:17: error: expected `;' before 'newLocalTime'
jay:18: error: 'Utility' was not declared in this scope
jay:18: error: 'newLocalTime' was not declared in this scope
jay:22: error: 'System' was not declared in this scope
jay:22: error: expected `;' before 'timer'
jay:23: error: 'Thread' was not declared in this scope
jay:23: error: 'Timeout' was not declared in this scope
jay.cpp: In function 'void loop()':
jay:37: error: 'dtAlarms' was not declared in this scope
jay:42: error: 'dtAlarms' was not declared in this scope
jay.cpp: At global scope:
jay:48: error: expected declaration before '}' token
What a first impression to make for you guys 
Thanks a lot, and any help will be greatly appreciated!!
Also note that im only trying to control one relay at this time.