Category: Senza categoria

Hi ,

I always use github but I never shared my repositories.
My repositories:

– burglar alarm system
– timer

Bests,

Giuseppe

Here I am again with the timer.

As I explained in the previous post I want to turn on and/or turn off an electrical appliance at 220 V using relays.

I never had any experience in using relays, then at the moment the scheme will include a led.

Here is the schema seen previously with the addition of led connected to PIN 13 Arduino digital:

And here is the code:

#include <Wire.h>
#include <String.h>
#include "RTClib.h"
  
#define BUFFER_SIZE 20
#define STATE_OFF  0
#define STATE_ON   1
  
//Giornate di programmazione
const int numeroProgrammazioni = 4;
String Monday[numeroProgrammazioni] = {
  "21:35", "20:30","20:35","20:40"};
String Tuesday[numeroProgrammazioni] = {
  "11:00", "11:35","13:10","13:50"};
String Wednesday[numeroProgrammazioni] = {
  "20:55", "19:58","20:00","20:05"};
String Thursday[numeroProgrammazioni] = {
  "10:00", "10:35","17:10","20:00"};
String Friday[numeroProgrammazioni] = {
  "10:00", "10:35","14:10","15:00"};
String Saturday[numeroProgrammazioni] = {
  "18:15", "18:20","18:22","18:25"};
String Sunday[numeroProgrammazioni] = {
  "10:00", "10:35","12:10","15:00"};
//Fine giornate di programmazione
  
RTC_DS1307 rtc;
int fsm_state;
String START_TIME;
String END_TIME;
int nSize = numeroProgrammazioni / 2;
String giornoTemp[numeroProgrammazioni];
  
void setup () {
  //Serial.println("Inizio Setup");
  fsm_state = STATE_OFF;
  Serial.begin(57600);
#ifdef AVR
  Wire.begin();
#else
  Wire1.begin(); // Shield I2C pins connect to alt I2C bus on Arduino Due
#endif
  rtc.begin();
  
  if (! rtc.isrunning()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  
  pinMode(13,OUTPUT);        //Collegamento al LED
}
  
void loop () {
    // Ricavo il time attuale
    DateTime now = rtc.now();  
  
    int giorno = now.dayOfWeek();      //0 = Monday 1 = Tuesday 2 = Wednesday ....
    //Serial.println( giorno);
    if (giorno == 1){                  //Monday
      memcpy(giornoTemp,Monday, sizeof(Monday));
    }
    else if (giorno == 2){            //Tuesday
      memcpy(giornoTemp,Tuesday, sizeof(Tuesday));
    }
    else if (giorno == 3){            //Wednesday
      memcpy(giornoTemp,Wednesday, sizeof(Wednesday));
    }
    else if (giorno == 4){            //Thursday
      memcpy(giornoTemp,Thursday, sizeof(Thursday));
    }
    else if (giorno == 5){            //Friday
      memcpy(giornoTemp,Friday, sizeof(Friday));
    }
    else if (giorno == 6){            //Saturday
      memcpy(giornoTemp,Saturday, sizeof(Saturday));
    }
    else if (giorno == 7){            //Sunday
      memcpy(giornoTemp,Sunday, sizeof(Sunday));
    }
  
    //verifico lo stato che dovrà assumere
    int isON = 0;
    for (int i= 0; i< nSize;i++){
      START_TIME = giornoTemp[i*2];
      END_TIME = giornoTemp[(i*2)+1];
      isON = setStatus(now,START_TIME,END_TIME);
      gestisciCarico(isON);
    } //end for
  
  delay(3000);
}
  
int setStatus(DateTime timeOra, String START_TIME, String END_TIME)
{
  //recupero l'ora
  DateTime dSTART_TIME = DateTime(timeOra.year(),timeOra.month(),timeOra.day(),START_TIME.substring(0, 2).toInt(),START_TIME.substring(3, 5).toInt(),0);
  DateTime dEND_TIME = DateTime(timeOra.year(),timeOra.month(),timeOra.day(),END_TIME.substring(0, 2).toInt(),END_TIME.substring(3, 5).toInt(),0);
  long lSTART_TIME = dSTART_TIME.unixtime();
  long lEND_TIME = dEND_TIME.unixtime(); 
  
  switch(fsm_state) {
  case STATE_OFF:
    if(timeOra.unixtime() > lSTART_TIME && timeOra.unixtime() < lEND_TIME) {
      fsm_state = STATE_ON;
      //Serial.println("caso 1");
    }
    break;
  case STATE_ON:
    if(timeOra.unixtime() > lEND_TIME) {
      fsm_state = STATE_OFF;
      //Serial.println("caso 2");
    }
    break;
  }
  
  return fsm_state;
}
  
void gestisciCarico(int isON)
{
  if (isON == 1){
    digitalWrite(13,HIGH);
  }
  else
  {
    digitalWrite(13,LOW);
  }
}

Code explanation:

from line 12 to line 25: setting times of day when turn led
row 47: setting RTC with time and date code compilation
row 50: setting led connection on pin 13
In the loop:
row 55: updating RTC with current day and time
row 57: Getting current day (0= monday, 1 = thusday…).
In this way i can undestand which array I have to use to determine hour settings.
line 86: using the setStatus function to test whether or not turn on the led
row 84: function setStatus: to compare dates using the function unixtime () that converts the date to unix (long): The function returns an int (0/1) 1 turn on led and 0 turn off
line 87: gestisciCarico function: the function takes as input the value previously returned. At this point it is actually switched on led.

 
This is actually what we wanted: our led will turn on or off in the hours established by us.

The next steps, which I’ll explain soon are:

1. adding a random function (optional): If the random function is activated, I’ll add some random minutes to the hour I decided in array.

2. using relay to turb off or on a 220v bulb.

That’s all.

Happy 2016!

For my latest experiments (see previous post) I decided to buy my first Arduino clone.

Once written the sketch I tried to upload it: nothing, no USB communication with my MAC system.

Reading the ad and looking better the tab, I found that the chip that is responsible for the serial communication is not present in the original Arduino boards but is the CH340G chip (USB/Serial Interface).

It is therefore necessary to find the correct drivers to handle the chip.

I found this very interesting guide searching in Internet.

Summary for my future and memory for those who follow me:

1. Download the drivers fromm here (chip manufacturer’s site) or directly from my site (CH341SER_MAC)
2. Unzip the file
3. Open the unzipped folder, inside there is ch34xInstall.pkg file. Run the package installation
4. If required, perform the reboot
5. If, like me, you have OS-X, open Terminal and run the following command:

   sudo nvram boot-args="kext-dev-mode=1"
   

6. Reboot

At this point in the Arduino Ide, on the Tools menu, serial port, you can select the correct serial port.

I hope you can help!

Buongiorno a tutti,

mi presento, sono Giuseppe.
Sono un programmatore NET con la passione per la corsa, la bicicletta e per lo sport in generale.
Ed ora di Arduino: ho scoperto un mondo nuovo, di passione e di fantasia.
Sono completamente nuovo in questo mondo, ma voglio provarci e scrivere dei miei “successi” e dei miei fallimenti.

Spero di avere suggerimenti e perché no, critiche, in modo da poter migliorare ed imparare.

Giuseppe