💬 Real Time Clock Module, LCD Display and Controller Time
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This thread contains comments for the article "Real Time Clock Module, LCD Display and Controller Time" posted on MySensors.org.
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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?
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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
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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); }
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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
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@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)
