💬 Real Time Clock Module, LCD Display and Controller Time

[hek]

This thread contains comments for the article "Real Time Clock Module, LCD Display and Controller Time" posted on MySensors.org.

[mpp]

Thank you for this nice write up.

I have some "low power" questions:

• Will the RTC continue to work when the Arduino is set to Sleep?
• Is there a way to save battery and wake up the Arduino using the RTC?
• What is the power consumption of a get time request?
• What is the autonomy of the RTC?

[hek]

Yes, the RTC will continue to function while the Arduino is sleeping.

On the DS3232RTC you can set alarm (which triggers the INT pin of the module). See more info here:
https://github.com/mysensors/MySensorsArduinoExamples/tree/master/libraries/DS3232RTC

[cadet]

I was modify code to Present temp to controller .

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik Ekblad
 * 
 * DESCRIPTION
 * Example sketch showing how to request time from controller which is stored in RTC module
 * The time and temperature (DS3231/DS3232) is shown on an attached Crystal LCD display
 * 
 *
 * Wiring (radio wiring on www.mysensors.org)
 * ------------------------------------
 * Arduino   RTC-Module     I2C Display 
 * ------------------------------------
 * GND       GND            GND
 * +5V       VCC            VCC
 * A4        SDA            SDA
 * A5        SCL            SCL
 *
 * http://www.mysensors.org/build/display
 *
 */

// Enable debug prints to serial monitor
#define MY_DEBUG 

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69
 
#include <SPI.h>
#include <MySensors.h>  
#include <TimeLib.h> 
#include <DS3232RTC.h>  // A  DS3231/DS3232 library
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
//#include <LCD_1602_RUS.h>

bool timeReceived = false;
unsigned long lastUpdate=0, lastRequest=0;

int numSensors=0;
#define CHILD_ID_TEMP 15
#define COMPARE_TEMP 1                            // Send temperature only if changed? 1 = Yes 0 = No
MyMessage msg(0,V_TEMP);
float lastTemperature;


// Initialize display. Google the correct settings for your display. 
// The follwoing setting should work for the recommended display in the MySensors "shop".
LiquidCrystal_I2C lcd(0x3F, 16, 2);
//LCD_1602_RUS lcd(0x3F, 16, 2);

void setup()  
{  
  // the function to get the time from the RTC
  setSyncProvider(RTC.get);  

  // Request latest time from controller at startup
  requestTime();  
  
  // initialize the lcd for 16 chars 2 lines and turn on backlight
  lcd.begin(16,2); 
  lcd.init();                    // Инициализируем экран
  lcd.clear();
  lcd.backlight();               //включаем подсветку
}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("RTC Clock + Temp", "1.1.1");
  present(0, S_TEMP); 
 
  numSensors = 1 ;
}

// This is called when a new time value was received
void receiveTime(unsigned long controllerTime) {
  // Ok, set incoming time 
  Serial.print("Time value received: ");
  Serial.println(controllerTime);
  RTC.set(controllerTime); // this sets the RTC to the time from controller - which we do want periodically
  timeReceived = true;
}
 
void loop()     
{     
  unsigned long now = millis();
  
  // If no time has been received yet, request it every 10 second from controller
  // When time has been received, request update every hour
  if ((!timeReceived && (now-lastRequest) > (10UL*1000UL))
    || (timeReceived && (now-lastRequest) > (60UL*1000UL*60UL))) {
    // Request time from controller. 
    Serial.println("requesting time");
    requestTime();  
    lastRequest = now;
  }
  
  // Update display every second
  if (now-lastUpdate > 1000) {
    updateDisplay();  
    lastUpdate = now;
  }
}


void updateDisplay(){
  tmElements_t tm;
  RTC.read(tm);

  // Print date and time 
  lcd.home();
  lcd.print(tm.Day);
  lcd.print("/");
  lcd.print(tm.Month);
  lcd.print("/");
  lcd.print(tmYearToCalendar(tm.Year)-2000);

  lcd.print(" ");
  printDigits(tm.Hour);
  lcd.print(":");
  printDigits(tm.Minute);
//  lcd.print(":");
//  printDigits(tm.Second);

  // Go to next line and print temperature
  lcd.setCursor ( 0, 1 );  
  lcd.print("Temp: ");
  lcd.print(RTC.temperature()/4);
  lcd.write(223); // Degree-sign
  lcd.print("C");
  float temperature = (RTC.temperature()/4);
  #if COMPARE_TEMP == 1
    if (lastTemperature != temperature && temperature != -127.00 && temperature != 85.00) {
    #else
    if (temperature != -127.00 && temperature != 85.00) {
    #endif

      // Send in the new temperature
      send(msg.setSensor(0).set(temperature, 1));
      // Save new temperatures for next compare
      lastTemperature=temperature;
    }
 
  
}


void printDigits(int digits){
  if(digits < 10)
    lcd.print('0');
  lcd.print(digits);
}

[cadet]

@cadet
Hi all

Can I display Temp from other sensor ?

Thank you
Andrey

[exagon_46]

Hi, I wanted to know if it was possible to create a node in each room with a temperature sensor and display and send it all to the controller

[gohan]

@cadet sure you can, in the send() function you can specify a destination ID of the node with the display

@exagon_46 of course is possible, just add some code to display the temperature (use the examples of the LiquidCrystal_I2C library as reference)

[JeeLet]

good evening

again a new sketch for the "void receiveTime" function
(without RTC clock)

• start synchronization with the controller and regularly for the drift of the arduino.
• display time and date on an OLED screen
• error message when a loss of communication with the controller occurs

a video "https://www.casimages.com/v/RSWTNb-vokoscreen-2022-05-24-19-33-49.mp4.html"

/*
 * LIBRAIRIE:
 *  MySensors v2    : https://github.com/mysensors/MySensors
 *  TimeLib.h       : https://github.com/PaulStoffregen/Time
 *  SSD1306Ascii.h  : https://github.com/greiman/SSD1306Ascii
 *
 * MATERIEL:
 *    Arduino Uno
 *    -Afficheur OLED 0,96" I2C TF052 / circuit SSD1306.
 *    bus TTLModule RS485
 * 
 * REVISION HISTORY
 *  base de Henrik Ekblad 2013-2015 et autres :)
 *  ajout bus RS485 et OLED
 * 
 * DESCRIPTION
 *  demander Date et Heure au  contrôleur et l'affiche sur ecran OLED 
 *  Request date and time from the controller and display it on OLED screen 
 *  
 *  Connectique i2c:
*   Arduino :  A4   A5
*   OLED    :  SDA  SCL
 *  
 */
//-- The sketch uses 11932 bytes (36%) ----global variables use 839 bytes (40%)-----------
//-
//------------ 2022 ----------------------- Fonctionnelle avec MyC et MyS------------------- 

  //#define MY_DEBUG                  /*Enable debug prints to serial monitor*/
  #define MY_TRANSPORT_WAIT_READY_MS 3000  /*Timeout (ms) pour mis en Com.(0 pour aucun)*/
  #define MY_NODE_ID 22          /*Node en ID static*/

/* ----- Module RS485 ----*/
  #define MY_RS485                  /*Apl du transport RS485 (protocol?)*/
  #define MY_RS485_DE_PIN 2         /*Cmd DE pin*/
  #define MY_RS485_BAUD_RATE 9600   /*Set RS485 baud rate to use*/
//#define MY_RS485_HWSERIAL Serial1 /*pour port Serial autre*/
  
  #include "SSD1306Ascii.h"
  #include "SSD1306AsciiAvrI2c.h"
  
  #include <MySensors.h>  
  #include <TimeLib.h> 

  #define CHILD_ID 22       /* MyS numero du Node*/

  #define I2C_ADDRESS 0x3C                        /*i2c adresse*/
  
  #define RST_PIN -1  // Define proper RST_PIN if required.(oled)
   
  SSD1306AsciiAvrI2c oled;  //type de com oled

//----- MyS ------
    bool timeReceived = false;  
    bool stateCom = false;
    unsigned long lastUpdate=0, lastRequest=0 , lastmillis = 0;
    unsigned long newTime = 0, oldTime = 0, ComTime = 6000;

//---------------- SETUP ----------------------------

  void setup()  {  

//--- OLED ----
  #if RST_PIN >= 0
    oled.begin(&Adafruit128x32, I2C_ADDRESS, RST_PIN);
  #else // RST_PIN >= 0
    oled.begin(&Adafruit128x32, I2C_ADDRESS);
  #endif // RST_PIN >= 0

    oled.setFont(Adafruit5x7);         /*font Oled*/
    // oled.setFont(font8x8);             //bien 
    // oled.setFont(Verdana12);           //grand
    // oled.setFont(fixed_bold10x15);     //tres grand   
    // oled.setFont(Arial_bold_14);       //grand sympa 
    oled.clear();
    }

//--------------MySensors-------------

  void presentation()  {
    sendSketchInfo("Clock", "2.0");
    }

//------------------ LOOP -----------------------
  void loop() {     
  
// ---- MyS time --------  
  unsigned long now = millis();
  
   if (now-lastRequest > (ComTime)) {    
                
      timeReceived = false;
      requestTime(receiveTime);   // Request time from controller. 
      lastRequest = now;
      }
    
//----- Tempo Display Oled ----------
  if (now-lastUpdate > 10000) {  //10secondes
    lastUpdate = now;
   // Serial.print(" test lastmillis------------ display : "); 
   // Serial.println(timeReceived);
    updateDisplay();
    lastmillis = millis();


//----- Stat Com ---
    if (timeReceived == 1) {   //En Com Controller stateCom
      ComTime = 480UL*1000UL;    // 480=8 minutes cycles for Control presence controller 
        }
    else  {           // Erreur Com Controller
      stateCom = false;
      ComTime = 60UL*1000UL;    // secondes for attempted reconnection to the controller 
     // Serial.println(" ----*** Erreur Com Controller *** ---- ");
      }
     }
   } //---Loop

 // -------------------- MyS --------------------------------
  void receiveTime(unsigned long controllerTime)   {   
   if (receiveTime) stateCom = true ; else stateCom = false;
    newTime = controllerTime;
    timeReceived = true;
    setTime(controllerTime); // apl pour TimeLib.h
    }
    
//------------Gestion de l'affichage OLED---------------
  void updateDisplay() {

    oled.set1X();           //ligne Message
    oled.setCursor(2, 0);
    printStatDay () ;       // affiche jour de la semaine/poster day of the week
    //oled.print(day());
   
    oled.set2X();           //ligne Heures
    oled.setCursor(18,1);
    oled.print(hour());
    printDigits(minute());
    printDigits(second());
     
    oled.set1X();           // ligne jour mois Année / day month year
    oled.setCursor(35,3);
    oled.print(day());
    printDigitsDay(month());
    printDigitsDay(year());
   }

//-------- Day displaying-------
  void printDigitsDay(int digitday) { //function for Day displaying "0" and separator "/" for day/month/year values
    oled.print("/");
      if(digitday < 10)
        oled.print('0');
        oled.print(digitday);
    }

//-------- Time displaying-------
  void printDigits(int digits) {  //function for Time displaying "0" and separator ":" for hour:minute:sec values
    oled.print(":");
      if(digits < 10)
        oled.print('0');
        oled.print(digits);
    }

//------ conversion date en texte (fonction weekday) et statu Com Controller -----------  
  void printStatDay () {   //function for display Day texte

    oled.invertDisplay(!(stateCom)); // inverse N/B Oled sur erreur Com
    if(stateCom == true) { oled.print("com  "); }    //com okai
    if(stateCom == false){ oled.print("Error"); }    //com Error
      // oled.print(stateCom);
        oled.print("  ");
      
   
    if(weekday() == 1) { oled.print("dimanche"); }  //Sunday
    if(weekday() == 2) { oled.print("lundi"); }     //Monday
    if(weekday() == 3) { oled.print("mardi"); }     //Tuesday
    if(weekday() == 4) { oled.print("mercredi"); }  //Wednesday
    if(weekday() == 5) { oled.print("jeudi"); }     //Thursday
    if(weekday() == 6) { oled.print("vendredi"); }  //Friday
    if(weekday() == 7) { oled.print("samedi"); }    //Saturday

     oled.print(" ");
     oled.print(day());
   }

//-------------------FIN PGM --------------------------

//------------------- INFO -------------------

why open a new post, there is still some space here