Hi
I’ve made a simple and small sketch for a sprinkler control system
/*
Udp NTP Client
Get the time from a Network Time Protocol (NTP) time server
Demonstrates use of UDP sendPacket and ReceivePacket
For more on NTP time servers and the messages needed to communicate with them,
see http://en.wikipedia.org/wiki/Network_Time_Protocol
created 4 Sep 2010
by Michael Margolis
modified 17 Sep 2010
by Tom Igoe
This code is in the public domain.
*/
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
#include <Time.h>
#include <TimeAlarms.h>
//CONFIG RELAY BOARD
#define RELAY_ON 0
#define RELAY_OFF 1
#define Relay_1 3 // Valve 1
#define Relay_2 5 // Valve 2
#define Relay_3 6 // Valve 3
#define Relay_4 8 // Valve 4
#define Relay_5 9 // Valve 5
#define Relay_6 4 // Valve 6
#define Relay_7 7 // Valve 7
#define Relay_M 2 // Master Valve
// Configurazione di rete e NTP
byte mac[] = { 0x90, 0xA2, 0xDA, 0x06, 0x00, 0x5A }; //Mac Adress Arduino
unsigned int localPort = 8888; // Porta UDP
IPAddress timeServer(199,167,198,163); // pool.ntp.org NTP server
const int NTP_PACKET_SIZE= 48; // NTP time stamp is in the first 48 bytes of the message
byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets
EthernetUDP Udp;
int timeZoneHour = +2; // Timezone (+1 inverno - +2 Estate)
long timeZoneOffset = (timeZoneHour * -1) * 60 * 60 ;
int NTP_Update_Interval = 86400; // Intervallo update NTP in secondi (86400 = una volta al giorno)
// Config DURATA
int var;
int attive; // Numero Stazioni attive (per il calcolo della pausa)
int durata1 = 10; //in secondi
int durata2 = 10; //in secondi
int durata3 = 10; //in secondi
int durata4 = 10; //in secondi
int durata5 = 10; //in secondi
int durata6 = 10; //in secondi
int durata7 = 0; //in secondi
long intervallo = 1200; //pause time
// Config PARTENZA e FINE
int orapartenza = 19;
int minutopartenza = 31;
int orafine = 19;
int minutofine = 51; //Dare tempo di fare un ulteriore giro se necessario
// Void Setup - Esecuzione solo all'avvio
void setup()
{
digitalWrite(Relay_1, RELAY_OFF);
digitalWrite(Relay_2, RELAY_OFF);
digitalWrite(Relay_3, RELAY_OFF);
digitalWrite(Relay_4, RELAY_OFF);
digitalWrite(Relay_5, RELAY_OFF);
digitalWrite(Relay_6, RELAY_OFF);
digitalWrite(Relay_7, RELAY_OFF);
digitalWrite(Relay_M, RELAY_OFF);
Serial.begin(9600);
Serial.println("Starting");
// start Ethernet and UDP
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// no point in carrying on, so do nothing forevermore:
for(;;);
}
Udp.begin(localPort);
Serial.print("Got IP:");
Serial.println(Ethernet.localIP());
setSyncProvider(getNTPTime);
Serial.println("Looking for a time");
while(timeStatus()== timeNotSet);
Serial.println("Got a Time");
setSyncInterval(NTP_Update_Interval);
// SVEGLIE
Alarm.alarmRepeat(orapartenza,minutopartenza,0, MorningAlarm); // Partenza
Alarm.alarmRepeat(orafine,minutofine,0,EveningAlarm); // Fine
//LED
pinMode(Relay_1, OUTPUT);
pinMode(Relay_2, OUTPUT);
pinMode(Relay_3, OUTPUT);
pinMode(Relay_4, OUTPUT);
pinMode(Relay_5, OUTPUT);
pinMode(Relay_6, OUTPUT);
pinMode(Relay_7, OUTPUT);
pinMode(Relay_M, OUTPUT);
}
//void loop - Programma sempre in esecuzione
void loop(){
if (var == 1)
{
Azione();
}
else
{
stampaorario();
Alarm.delay(1000);
}
}
// Printdigits - Mette lo 0 davanti alle cifre
void printDigits(int digits){
if(digits < 10)
Serial.print('0');
Serial.print(digits);
}
//Accende i LED
void Azione(){
// MASTER
if ( durata1 > 0 || durata2 > 0 || durata3 > 0 || durata4 > 0 || durata5 > 0 || durata6 > 0 || durata7 > 0 )
{
Serial.print("Partenza Stazione MASTER: ");
stampaorario();
digitalWrite(Relay_M, RELAY_ON);
Alarm.delay(1000);
attive++;
}
// Stazione 1
if ( durata1 > 0 ){
Serial.print("Partenza Stazione 1: ");
stampaorario();
digitalWrite(Relay_1, RELAY_ON);
Alarm.delay(durata1*1000);
digitalWrite(Relay_1, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
//Stazione 2
if ( durata2 > 0 ){
Serial.print("Partenza Stazione 2: ");
stampaorario();
digitalWrite(Relay_2, RELAY_ON);
Alarm.delay(durata2*1000);
digitalWrite(Relay_2, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
//Stazione 3
if ( durata3 > 0 ){
Serial.print("Partenza Stazione 3: ");
stampaorario();
digitalWrite(Relay_3, RELAY_ON);
Alarm.delay(durata3*1000);
digitalWrite(Relay_3, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
// Stazione 4
if ( durata4 > 0 ){
Serial.print("Partenza Stazione 4: ");
stampaorario();
digitalWrite(Relay_4, RELAY_ON);
Alarm.delay(durata4*1000);
digitalWrite(Relay_4, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
// Stazione 5
if ( durata5 > 0 ){
Serial.print("Partenza Stazione 5: ");
stampaorario();
digitalWrite(Relay_5, RELAY_ON);
Alarm.delay(durata5*1000);
digitalWrite(Relay_5, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
// Stazione 6
if ( durata6 > 0 ){
Serial.print("Partenza Stazione 6: ");
stampaorario();
digitalWrite(Relay_6, RELAY_ON);
Alarm.delay(durata6*1000);
digitalWrite(Relay_6, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
// Stazione 7
if ( durata7 > 0 ){
Serial.print("Partenza Stazione 7: ");
stampaorario();
digitalWrite(Relay_7, RELAY_ON);
Alarm.delay(durata7*1000);
digitalWrite(Relay_7, RELAY_OFF);
Alarm.delay(1000);
attive++;
}
// Fine MASTER e Pausa
if ( durata1 > 0 || durata2 > 0 || durata3 > 0 || durata4 > 0 || durata5 > 0 || durata6 > 0 || durata7 > 0 ) {
digitalWrite(Relay_M, RELAY_OFF);
Serial.print("Inizio Pausa: ");
stampaorario();
Serial.print("Durata Pausa: ");
Serial.print(intervallo-durata1-durata2-durata3-durata4-durata5-durata6-durata7-attive);
Serial.print(" Secondi ");
Serial.println();
Alarm.delay(intervallo*1000-durata1*1000-durata2*1000-durata3*1000-durata4*1000-durata5*1000-durata6*1000-durata7*1000-1000*attive);
attive=0;
}
}
// Stampaorario - Stampa l'ora come voglio io
void stampaorario() {
printDigits(hour());
Serial.print(":");
printDigits(minute());
Serial.print(":");
printDigits(second());
Serial.print(" ");
printDigits(day());
Serial.print("/");
printDigits(month());
Serial.print("/");
Serial.print(year());
Serial.println();
}
// functions to be called when an alarm triggers:
void MorningAlarm(){
var = 1;
}
void EveningAlarm(){
var = 0;
}
//Codice NTP
unsigned long getNTPTime()
{
Serial.println("In getNTPTime");
sendNTPpacket(timeServer);
Alarm.delay(1000);
if ( Udp.parsePacket() ) {
Serial.println("Got Time Packet");
Udp.read(packetBuffer,NTP_PACKET_SIZE);
unsigned long highWord = word(packetBuffer[40], packetBuffer[41]);
unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]);
unsigned long secsSince1900 = highWord << 16 | lowWord;
const unsigned long seventyYears = 2208988800UL + timeZoneOffset;
unsigned long epoch = secsSince1900 - seventyYears;
return epoch;
}
Serial.println("No Time Packet Found");
return 0;
}
// send an NTP request to the time server at the given address
unsigned long sendNTPpacket(IPAddress& address)
{
// set all bytes in the buffer to 0
memset(packetBuffer, 0, NTP_PACKET_SIZE);
// Initialize values needed to form NTP request
// (see URL above for details on the packets)
packetBuffer[0] = 0b11100011; // LI, Version, Mode
packetBuffer[1] = 0; // Stratum, or type of clock
packetBuffer[2] = 6; // Polling Interval
packetBuffer[3] = 0xEC; // Peer Clock Precision
// 8 bytes of zero for Root Delay & Root Dispersion
packetBuffer[12] = 49;
packetBuffer[13] = 0x4E;
packetBuffer[14] = 49;
packetBuffer[15] = 52;
// all NTP fields have been given values, now
// you can send a packet requesting a timestamp:
Udp.beginPacket(address, 123); //NTP requests are to port 123
Udp.write(packetBuffer,NTP_PACKET_SIZE);
Udp.endPacket();
}
It simply takes the time from an NTP server, and when the morning alarm starts the sequence it activates the various relays and then pause for a given time, after the pause it restarts the sequence until the evening alarm stops everything for the night.
The main problem is that I have the same pause time for every station. I would like to have the ability to control every relay indipendently. Since I’m a programming newbie, what’s the easiest way to achieve that?
If you need any explanation for the code (most of the comments are in Italian 
), just ask.
Thank you
